INFINITY A PRESSURE EQUALIZED RAINSCREEN EXTERIOR INSULATION AND FINISH SYSTEM DUK145

Transcription

1 INFINITY A PRESSURE EQUALIZED RAINSCREEN EXTERIOR INSULATION AND FINISH SYSTEM INFINITY Installation Instructions

2 Checklist Prior To The Installation Of Infinity PROJECT CONDITIONS Air and surface temperatures for applying most Dryvit products must be 4 C (40 F) or above and must remain so for a minimum of 24 hours; however, please reference each product s data sheet for individual product requirements with regard to temperatures and drying times.. For example: When Demandit is used, a minimum temperature of 7 C (45 F) is required. For Ameristone and Custom Brick Finishes, refer to individual finishes specifications and application instructions. Ensure that all roof-to-wall flashings and run-off diverters (i.e. kick-outs) are installed where required. Particular attention must be paid to the eaves/chimney intersections and sloped roof/wall intersections. Refer to Infinity Installation Details, DUK120. Protect surrounding areas and surfaces during the installation of the Infinity System. The tops of all walls shall be immediately covered with the final trim or be temporarily protected to prevent water infiltration behind the system. Permanent protection in the form of cap flashing or copings shall be installed as soon as possible after the finish coat has been applied. Infinity materials shall be fully dry prior to installation of sealant materials (typically hours). Humid or cool conditions may require longer drying times. Materials Required For Completing Installation Of The Infinity System MATERIALS SUPPLIED BY GEORGIA-PACIFIC CORPORATION Dens-Glass Gold Sheathing MATERIALS SUPPLIED BY DRYVIT UK Ltd. Dryvit DryShield ABA Dryvit Grid Tape Dryvit Flashing Tape Dryvit Flashing Tape Surface Conditioner Dryvit I. S. Insulation Board Dryvit AP Adhesive Dryvit Starter Strip Dryvit Vent Track Dryvit Track Dryvit Vent Assembly Dryvit I. S. Insulation Board Closure Blocks Dryvit I. S. Base Dryvit I. S. Reinforcing Mesh, Panzer 20, Corner Mesh, Detail Mesh Dryvit Infinity Finishes: Infinitex QP, Infinitex SP, Infinitex SPF, Infinitex ADB Dryvit Specialty Finishes: Ameristone, Stone Mist, Custom Brick Dryvit Coating and Primer: Demandit and Color Prime MATERIALS SUPPLIED BY DOW CORNING CORPORATION Dow Corning 790, 791, or 795 Sealant with Dow Corning 1200 Prime Coat MATERIALS SUPPLIED BY OTHERS Portland Cement: Type I, II or I-II Closed cell backer rod 2

3 I. Dens-Glass Gold Sheathing Installation A. Inspect the framing and install the Dens-Glass Gold sheathing in strict accordance with Georgia-Pacific Product Bulletin No Dens-Glass Gold Application and Installation Procedures For Dryvit Infinity Series, included as Appendix A of this document. NOTE: GOLD SURFACE MUST FACE OUTWARD! II. Mixing Instructions A. Air Barrier and Insulation Board Adhesive 1. DryShield ABA a. Open the bucket using a utility knife or lid-off. b. Due to shipping and storage, there may be some settling of materials. Prior to splitting the material and mixing with Portland cement, mix the material thoroughly using a Wind-Lock B-M1 or B-M8, or equivalent, mixing blade powered by a 13 mm (1/2 in) drill, at rpm. Caution: Do not overmix or use other types of mixing blades as air entrapment and product damage may occur and result in workability and performance problems. c. The DryShield ABA is mixed in a 1:1 ratio, by weight, with Portland cement. Pour 1/2 of the freshly mixed material, 13.6 kg (30 lbs), into a clean 18.9 L (5 gal) plastic container. Add 13.6 kg (30 lbs), approximately 1/3 of a bag, of fresh, lump-free Type I, II or I-II Portland cement. Either white or gray cement is acceptable. Add the cement slowly and mix thoroughly. Do not add large quantities of cement at one time or lumps may develop. d. Clean, potable water may be added to the mixture to adjust the workability. Add as little water as possible, in small increments, and only after the Portland cement is thoroughly mixed. CAUTION: Do not over water as this will degrade the performance of the product and promote efflorescence. e. It is advisable to thoroughly mix the DryShield ABA with Portland cement then wait five (5) minutes and mix again to break the initial set. Retempering with a small amount of water is permissible provided the mixture has not set. The mixture has a pot life similar to other Portland cement based materials. Mix only as much material as can be conveniently used during a work period. WARNING: No additives such as sand, aggregates, rapid binders, anti-freeze, accelerators, etc., shall be added to any Dryvit materials under any circumstances. Such additives will adversely affect the performance of the material, and void all warranties. B. Base Material 1. I. S. Base a. Open the bucket using a utility knife or lid-off. b. Due to shipping and storage, there may be some settling of materials. Prior to splitting the material and mixing with Portland cement, mix the material thoroughly using a Wind-Lock B-M1, B-M8, or equivalent, mixing blade powered by a 13 mm (1/2 in) drill, at rpm. Caution: Do not over-mix or use other types of mixing blades as air entrapment and product damage may occur and result in workability and performance problems. c. The I. S. Base is mixed in a 2:1 ratio, by weight, with Portland cement. Pour 1/2 of the freshly mixed material, 13.6 kg (30 lbs), into a clean 18.9 L (5 gal) plastic container. Add 6.8 kg (15 lbs) of fresh, lump free Type I, II or I-II Portland cement. Either white or gray cement is acceptable. Add the cement slowly and mix thoroughly. Do not add large quantities of cement at one time or lumps may develop. d. Clean, potable water may be added to the mixture to adjust the workability. Add as little water as possible, in small increments, and only after the Portland cement is thoroughly mixed. CAUTION: Do not over water as this will degrade the performance of the product and promote efflorescence. e. It is advisable to thoroughly mix the I. S. Base with Portland cement then wait five (5) minutes and mix again to break the initial set. Retempering with a small amount of water is permissible provided the mixture has not set. The mixture has a pot life similar to other Portland cement based materials. Mix only as much material as can be conveniently used during a work period. WARNING: No additives such as sand, aggregates, rapid binders, anti-freeze, accelerators, etc., shall be added to any Dryvit materials under any circumstances. Such additives will adversely affect the performance of the material, and void all warranties. 3

4 C. Dryvit Infinity Finishes and Coatings 1. Infinitex QP, Infinitex SP, Infinitex SPF, Infinitex ADB, Demandit, and Color Prime. a. Thoroughly mix the factory prepared Dryvit Infinity finish or coating with a Wind-Lock B-M1 or B-M8 mixing blade, or equivalent, powered by a 13 mm (1/2 in) drill, at rpm, until a uniform, homogeneous consistency is attained. A small amount of clean water may be added to adjust workability. Always add the same amount of water to each pail within a given lot to avoid color variations. D. Dryvit Specialty Finishes 1 Ameristone and Stone Mist (For Ameristone refer to DUK142 for complete application instructions) a. Mix the factory prepared finish for approximately 1 minute using a Goldblatt Jiffler Mixer powered by a 13 mm (1/2 in) drill at rpm, just prior to application. 2. Custom Brick Finishes a. For Custom Brick Finishes, refer to Dryvit Custom Brick Application Instructions, DUK154 and DUK214, for complete mixing and usage instructions. III. Air Barrier Application A. Prior to applying the DryShield ABA, check the substrate to ensure that: 1. It is Dens-Glass Gold sheathing as manufactured by Georgia-Pacific Corporation. 2. The sheathing is securely fastened to the wall framing as specified in the contract drawings and Georgia- Pacific's instructions (Appendix A). 3. The sheathing is structurally sound, free of loose material, voids, projections, etc. and is installed with the gold side facing outward. 4. The Dens-Glass Gold is clean, dry, free of grease, oil, paints, and other foreign material. 5. There are no planar irregularities greater than 6.4 mm (1/4 in) within any 1.2 m (4 ft) radius. GAPS OR DAMAGE IN THE DENS-GLASS GOLD SHEATHING WHICH EXCEEDS 9.5 mm (3/8 in) IN ANY ONE DIRECTION MUST BE REPAIRED BY REPLACING DENS-GLASS GOLD MATERIAL. 6. All needed flashings and other waterproofing details have been completed, if such completion is required prior to the air barrier application. 7. Notify the general contractor and/or architect, and/or owner of all discrepancies. Do not proceed until all unsatisfactory conditions have been corrected. B. Check the wall surface and ambient temperatures to ensure that they are 4 C (40 F) and rising at the time of application. C. Application 1. Dryvit Grid Tape a. Apply the Dryvit Grid Tape along all joints in the Dens-Glass Gold sheathing, as well as inside corners, outside corners, and exposed edges at terminations that will not be covered with Dryvit Flashing Tape. b. Center the Dryvit Grid Tape on the sheathing joints, edges, etc. with the pressure sensitive adhesive backing in contact with the Dens-Glass Gold surface. Press into position with hand pressure until adhesion is achieved. c. Apply only enough Grid Tape as can be covered with DryShield ABA in the same work period. 2. Dryvit DryShield ABA a. Mix the DryShield ABA with Portland cement in accordance with Section II.A above. b. Using a stainless steel trowel, apply the DryShield ABA mixture over the Grid Tape at all Dens-Glass Gold board joints, corners, and all other areas that have Dryvit Grid Tape applied. Smooth and feather the DryShield ABA to completely cover the Grid Tape, and allow to take up for a minimum of two (2) hours or until firm. c. Apply a continuous layer of DryShield ABA mixture over the entire wall surface to a uniform thickness of approximately 1.6 mm (1/16 in) and allow to completely dry. 3. Dryvit Flashing Tape a. Dryvit Flashing Tape must be installed in order to maintain a continuous air barrier from the DryShield ABA onto the framing edges at discontinuities and terminations such as openings, expansion joints, tops of parapets, etc. Refer to Dryvit Infinity Installation Details, DUK120, for specific locations. b. Surface Preparation 1) Apply only in dry weather when air and surface temperatures are above 4 C (40 F). 2) The surface to receive the Dryvit Flashing Tape must be clean, dry, smooth and free of any other condition that will hinder adhesion. 3) Clean loose dust or dirt from the surface by wiping with a clean, dry cloth or brush. 4

5 4) If good initial adhesion cannot be obtained because of surface dust, cold temperature, or other conditions, priming is recommended with Dryvit Flashing Tape Surface Conditioner. Use of a heat gun to warm the wall surface immediately prior to application of the Flashing Tape will also help ensure good initial adhesion. c. Dryvit Flashing Tape Surface Conditioner Application 1) Measure the desired amount of surface conditioner needed and dilute with an equal amount of clean, potable water. 2) Apply to the surfaces which are to receive the Dryvit Flashing Tape using a brush or roller. Sufficient surface conditioner should be applied to condition the surface to a dust free state suitable for the application of the Dryvit Flashing Tape. It should not be applied so heavily that it puddles or runs. Application of excess material will not improve adhesion but will extend the drying time. 3) Allow to dry until the surface returns to its original color. The Flashing Tape Surface Conditioner is clear when dry and slightly tacky. Low temperatures and high humidity conditions may require longer drying times. Conditioning should be limited to areas that can be covered with Flashing Tape within the same work period. d. Dryvit Flashing Tape Application 1) Cut the Dryvit Flashing Tape to the appropriate length. Peel the release paper to expose the rubberized asphalt adhesive and align the tape into position before touching the wall. Position it so that it covers the DryShield ABA 50 mm (2 in), and the remainder is turned into the opening. Move along the opening being careful to put the tape as evenly as possible and avoiding fishmouths along the edges. If wrinkles develop, cut out the affected area and replace. Apply pressure to the tape so that it is firmly in contact with the wall surface. Press the tape into place with a hand roller as soon as possible to ensure continuous and intimate contact with the surface. End laps that occur must maintain a minimum overlap of 50 mm (2 in). Apply the Flashing Tape so that it completely covers the stud edges to the inside edge of the opening. Additional strips of Flashing Tape may be needed. CAUTION: The Dryvit Flashing Tape must be handled properly. Refer to the Material Safety Data Sheets for proper handling, storage, health and environmental considerations. 2) For sill-jamb intersections, and similar conditions, apply the Dryvit Flashing Tape as shown in the detail below. Apply the sill piece first, then apply the corner splice piece. The jamb piece is applied next, lapping over the splice piece. 1. Apply Sill Piece 2. Apply Corner Splice Piece 3. Apply Jamb Piece 5

6 3) For head-jamb intersections, the jamb pieces are applied first, followed by the corner splice pieces. The head piece is applied last. 4) Lap additional pieces of Flashing Tape as necessary to cover the returns to the inside edge of the stud or track. 5) For expansion joints, position the Dryvit Flashing Tape so that it is centered over the joint. Adhere to one side of the joint, and then adhere the adjacent side. Allow enough slack in the tape to account for any joint movement. 6) Coordinate the tape application with the I. S. Insulation Board installation. Apply only enough tape that can be covered with the insulation board in the same work period. IV. Installation of Dryvit Starter Strip, Dryvit Vent Assembly, Dryvit Vent Track, and Dryvit Track A. Check the wall surface and ambient temperatures to ensure that they are 4 C (40 F) and rising at the time of application. B. Prior to installing the Dryvit Starter Strip, I. S. Insulation Board and I. S Closure Blocks, check to ensure that: 1. They are shipped in a clear polyethylene bag bearing the Dryvit and Infinity names. The lot number of the insulation shall be visible on the outside of the bag. 2. One edge of each board shall bear the words Infinity System, the plant identification number of the block molder, the appropriate model code report number, and the name of the third party quality control agency with corresponding number. One board in each bag shall bear the same markings on each face. 3. It meets the following tolerances: a. Length : Plus or minus 1.6 mm (1/16 in). b. Width: Plus or minus 1.6 mm (1/16 in). c. Thickness: Plus or minus 1.6 mm (1/16 in) for boards greater than 25 mm (1 in). d. Squareness: Shall not deviate from square by more than.8 mm (1/32 in) in 300 mm (12 in) of total length and width. e. Edge Trueness: Shall not deviate more than.8 mm (1/32 in) in 300 mm (12 in). f. Face Flatness: Shall not exhibit any bowing of more than.8 mm (1/32 in) in the total length. Warning: Any I. S. Insulation Board or Closure Block not meeting the above requirements should be rejected and not installed. 4. The I. S. Insulation Board Closure Blocks shall measure a minimum of 150 mm (6 in) in width by 1.2 m (4 ft) in length, and a maximum of 300 mm (1 ft) in width by 1.2 m (4 ft) in length. The minimum thickness is 50 mm (2 in). 5. The I. S. Insulation Board shall measure maximum 600 mm (2 ft) by 1.2 m (4 ft) with a minimum thickness of 50 mm (2 in). 6. The back side of the I. S. Insulation Board shall have vertical grooves, and bevels, as shown in the Infinity Installation Details, DUK120. C. The Dryvit Starter Strip, Dryvit Vent Assembly, and Dryvit Vent Track are required at the base of all walls and compartments. 1. Provide a permanent or temporary support for the Dryvit Starter Strip and Dryvit Vent Assembly, and mark the location of the Vent Assembly along the base of the compartment. Note: Holes created by fasteners used for temporary supports that penetrate the air barrier must be sealed with the DryShield ABA mixture or Dryvit Flashing Tape, as appropriate, prior to adhering the I. S. Insulation Board. 2. Cut the Detail mesh to a working length. 3. Apply a ribbon of DryShield ABA mixture on the substrate and position the Detail Mesh in the wet mixture allowing for a 64 mm (2 1/2 in) minimum overlap onto the face of the Starter Strip and Vent Assembly. Keep the mesh which is not embedded clean. 4. Apply the DryShield ABA mixture to the backside of the Dryvit Starter Strip and Dryvit Vent Assembly using a Ribbon and Dab pattern, and position on the wall. Press gently and slide into position applying uniform pressure to ensure full contact and high initial grab. 5. Using a margin trowel, remove any adhesive from the edges of the insulation boards. Caution: Do not allow adhesive to remain in board joints. Ensure that the insulation board joints are abutted tightly, are level, and the faces are flush. 6. Install the Dryvit Vent Track by applying a continuous bead of Dryvit's AP Adhesive on the wall side of the track s vertical nailing flange and position over the Dryvit Vent Assembly with the cut out located directly above the vent material as shown in the detail below. Press firmly against the substrate to ensure firm and continuous contact between the adhesive and the wall surface. Install the Dryvit Track in the same manner along the top of the Starter Strip adjacent to the Vent Track. 6

7 7. Place a continuous bead of AP Adhesive along the top edge of the track and where pieces of track abut each other, to provide a seal. A.P. Adhesive Vent Track Fillet Bead A.P. Adhesive Starter Strip Vent Material ½" x 5" Slot in Vent Track Centered Over Vent Material Vent Assembly Backwrap 9 ½" Detail Mesh 8. Apply a bead of AP Adhesive to fill the track at each compartment separation to close off the compartment. V. Vertical Compartment Boundaries A. Check the wall surface and ambient temperatures to ensure that they are 4 C (40 F) and rising at the time of application. B. Vertical compartment boundaries are located by the designer and should be noted in the contract documents. 1. Strike a chalk line on the dry DryShield ABA to mark the location of the vertical compartment boundaries as shown in the contract documents. 2. Apply DryShield ABA adhesive mixture to the back of the I. S. Insulation Board Closure Blocks using a ribbon and dab adhesive pattern as shown below, and position along the compartment separation line. 6 Min. 12 Max 2 0 Max. Ribbon & Dab of DryShield ABA Mixture 7

8 Compartment Separation Line Vent Track SECTION A - A I.S. Insulation Board Closure Blocks I.S. Insulation Board Vent Assembly Starter Strip VI. Installation of I. S. Insulation Board and Closure Blocks A. Check the wall surface and ambient temperatures to ensure that they are 4 C (40 F) and rising at the time of application. B. Install 150 mm (6 in) wide I. S. Insulation Board Closure Blocks around all openings, and tops of compartments. Install 300 mm (12 in) wide Closure Blocks on alternating sides of outside corners, at vertical compartment boundaries (see Section V), and at vertical system terminations. 1. Jambs, sills, tops of compartments, and vertical system terminations a. Cut Detail mesh to a working length. b. Apply a ribbon of DryShield ABA mixture on the substrate and embed the Detail mesh into the wet mixture. Position the Detail mesh on the wall allowing for a 64 mm (2 1/2 in) minimum overlap onto the face of the I. S. Closure Blocks. Keep the mesh which is not embedded clean. c. Apply the DryShield ABA mixture to the back side of the I. S. Closure Blocks using a ribbon and dab pattern as shown below and position on the wall. 6 Min. 12 Max 2 0 Max. Ribbon & Dab of DryShield ABA Mixture 8

9 2. Heads of Openings a. Cut Detail mesh to a working length. b. Apply a ribbon of DryShield ABA mixture on the substrate and embed the Detail mesh into the wet mixture. Position the Detail mesh allowing for a 64 mm (2 1/2 in) minimum overlap onto the face of the I. S. Closure Block. Keep the mesh which is not embedded clean. c. Notch the top of the I. S. Closure Block to accept the Dryvit Track, as shown below: Note: Dryvit Starter Strips can also be used above windows, doors, etc. This will minimize the required field notching to only the L-shaped closure blocks at the corners. d. Apply the DryShield ABA mixture to the back side of the I. S. Insulation Board Closure Blocks using a ribbon and dab pattern and position on the wall. e. Offset the joints of the I. S. Insulation Board Closure Blocks a minimum of 150 mm (6 in) from the corner of the opening by using an L-shaped closure block at each corner. Starter Strip 6 Min. 6" Closure Block Edge Of Opening Notch Top Of Closure Block ¾" 6" 3/8" 2" Min. SECTION A - A 9

10 f. Cut a piece of Dryvit Track to length so that it extends 6 mm (1/4 in) beyond the edge of the closure blocks. Note: The Dryvit Track material must be continuous. DO NOT SPLICE! Continous Track Fastner Fillet Bead A.P. Adhesive A.P. Adhesive 1/4 Overhang Typical Closure Block Edge of Opening SECTION A - A DETAIL AT INTERSECTION OF HEAD AND JAMB g. Apply a continuous bead of Dryvit's AP Adhesive on the vertical nailing flange of the Dryvit Track, position the Dryvit Track so that it extends 6.4 mm (1/4 in) beyond the outside vertical edges of the I. S. Closure Blocks on the jambs, and adhere it to the wall as shown above. Apply an additional bead of AP Adhesive along the top edge of the Dryvit Track to provide a seal. 3. Outside Corners a. Install 300 mm (12 in) wide I. S. Closure Blocks on alternating sides of outside corners. Closure Blocks Starter Strip b. Apply the DryShield ABA mixture to the back side of the I. S. Closure Block using a ribbon and dab pattern and position on the wall. * When Installing Closure Blocks On Outside Corners, Hold The DryShield ABA Mixture Back From The Edge Of The Board By The Thickness Of The Foam 10

11 C. Installation of I. S. Insulation Board 1. Mix the DryShield ABA material as described in Section II.A With a notched trowel, 9.5 mm (3/8 in) wide by 13 mm (1/2 in) deep, apply the DryShield ABA mixture to the back side of the I. S. Insulation Board being careful not to allow the DryShield ABA mixture in the grooves of the board. Note: Application of DryShield ABA mixture to the back side of the I. S. Insulation Board with a notched trowel is the only approved method. Do not use the ribbon and dab method on I. S. Insulation Board! In other words, grooved Insulation Board is installed using a notched trowel and solid Insulation Board is installed using ribbon and dab 3. Beginning at the base of the wall (above the Dryvit Starter Strip), install the I. S. Insulation Boards with their long edges oriented horizontally. Locate the I. S. Insulation Boards so that joints are offset from the Dens- Glass Gold board joints a minimum of 150 mm (6 in) in both vertical and horizontal directions. Note: Position the I. S. Insulation Boards so that one of the grooves in the back of the board is centered over the I. S. Vent. 4. Apply firm pressure over the entire surface of the I. S. Insulation Board to ensure uniform contact and high initial grab. 5. Using a margin trowel, clean the I. S. Insulation Board edges of any DryShield ABA mixture. Ensure that the I. S. Insulation Board joints are butted tightly, are level and faces are flush. 6. Continue to install the bottom row of I. S. Insulation Board until you reach the I. S. Insulation Board Closure Block or an outside corner. 7. Install an I. S. Insulation Board Closure Block on the corner by applying a ribbon and dab pattern of DryShield ABA on the back side of the closure block and position on the wall. * When Installing Closure Blocks On Outside Corners, Hold The DryShield ABA Mixture Back From The Edge Of The Board By The Thickness Of The Foam NOTE: NOTCHED TROWEL PATTERN IS NOT TO BE USED WITH I. S. INSULATION BOARD CLOSURE BLOCKS. A PERIMETER RIBBON IS REQUIRED TO ASSURE COMPARTMENT CLOSURE. 8. Install the I. S. Insulation Board Closure Blocks on alternating sides of outside corners. Grooved/Beveled I.S. Insulation Board Alternating Square Edged Closure Blocks (Typical) 2' - 0" (610 MM) Starter Strip Apply a Bead of A.P. Adhesive In Track To Close Off Compartment 11

12 9. Cut to fit the I. S. Insulation Board adjacent to the I. S. Insulation Board Closure Block on the corner. Apply the DryShield ABA mixture on the back side of the I. S. Insulation Board with a notched trowel and place the square edge of the insulation board against the I. S. Insulation Board Closure Block as shown above. For the I.S. Insulation Board that abuts the back of the Closure Block from the adjacent wall face, apply a vertical ribbon of Dryshield ABA mixture, on the back side along the vertical edge. 10. Install subsequent rows in a running bond pattern with the vertical joints offset 600 mm (24 in) and vertical drainage grooves aligned with those of the previous row. 11. If for any reason the I. S. Insulation Board joints are not abutted tightly, slivers of I. S. Insulation Board must be installed to fill any gaps. Tip: In order to create a tight fit, it is recommended that a wider joint be cut with a Hot Groover, or similar tool, to allow for a more precise fitting sliver. All gaps must be slivered. Do not install adhesive on sliver edges. Do not cut deeper than 38 mm (1 1/2 in) into the face of the I. S. Insulation Board because the beveled edge will be affected. 12. Once the I. S. Insulation Board is in place, wait a minimum of 24 hours prior to working on the surface, to prevent any movement which may weaken the bond of the DryShield ABA adhesive to the air barrier. 13. To ensure an overall flat surface, use a straight edge of sufficient length to overlap at least eight feet of wall area. 14.Any irregularities in the I. S. Insulation Board surface must be sanded flat. Sanding is accomplished with a light circular motion using grade 20 grit sandpaper in conjunction with hand or air rasps. The entire wall surface must be sanded. NOTE: DO NOT SAND PARALLEL TO I. S. INSULATION BOARD JOINTS 15. Remove all loose pieces of I. S. Insulation Board and dust from the sanding operation using a brush or compressed air. VII. Installation of Reinforcing Mesh A. Check the wall surface and ambient temperature to ensure that they are 4 C (40 F) and rising at the time of application. B. Mix the I. S. Base Material as described in Section II.B.1. C. Embed the Detail Mesh which was previously installed for backwrapping the Dryvit Starter Strips and Closure Blocks in the I. S. Base Material mixture at this time. 1. With a stainless steel trowel, apply the I. S. Base Material mixture to the edge and face of the Dryvit Starter Strip, Dryvit Vent Assembly, and I. S. Insulation Board Closure Blocks and embed the Detail Mesh. Be careful not to coat the bottom edge of the vent material in the I. S Vent Assembly. Note: Cut and remove the Detail Mesh which covers the bottom edge of the vent material in the Dryvit Vent Assembly. D. When additional impact resistance is specified, Corner mesh may be added for additional strength at outside corners. Corner mesh should be embedded in the I. S. Base mixture and allowed to set prior to installing the reinforced base coat over the entire wall area. 12

13 E. Corners of all openings such as windows, doors, and mechanical equipment shall be reinforced with additional strips of Detail mesh placed diagonally to the opening as illustrated below. Backwrap I.S. Insulation Board Closure Blocks With Detail Mesh I.S. Closure Block I.S. Insulation Board Extend Mesh 6" On Sill & Jamb (Head & Jamb Similar) Dryvit Detail Mesh 9 ½" x 12" (Typ) F. Prior to installing the reinforcing mesh it should be inspected to ensure that it has been furnished by Dryvit UK Ltd. I.S. Reinforcing Mesh is colored gray for product identification. G. Dryvit reinforcing mesh is available in the following widths and lengths: I. S. Reinforcing Mesh m x 36.1m (48 in x 39.5 yd) - gray in color Panzer m x 22.9 m (48 in x 75 ft) - blue in color Corner mm x 45.7 m. (9 1/4 in x 150 ft) - blue in color Detail mm x 45.7 m (9 1/2 in x 150 ft) - blue in color H. Prior to installing the reinforced base coat, inspect the surface of the insulation board for: 1. Temperature: Check the wall surface and ambient temperatures to ensure that they are 4 C (40 F) and rising at the time of application. 2. Flatness: Using a minimum 2.4 m (8 ft) straight edge. Sand any high areas and out-of-plane board joints flat as described in Section VI.B.15. Caution: Do not build up low areas with I. S. Base mixture to form a flat surface. 3. Damage and foreign materials: Correct deficiencies as necessary. 4. Surface degradation due to weathering or U/V, visible as discoloration: Sand affected areas to remove deterioration while maintaining the flatness of the surface. 5. Dryness: Ensure that the insulation board is dry prior to coating with I. S. Base material mixture. I. Standard Base Coat, (single layer of I. S. Reinforcing Mesh.) 1. The I. S. Base mixture shall be applied such that the resulting overall minimum base coat thickness is sufficient to fully embed the reinforcing mesh. The recommended method is to apply the base coat in two (2) passes. 2. Double pass method (recommended) a. Using a stainless steel trowel, apply the I. S. Base Mixture on the entire surface of the insulation board, to an area slightly larger than the width and length of a piece of reinforcing mesh, in a uniform thickness of approximately 1.6 mm (1/16 in). b. Immediately place the reinforcing mesh against the wet I. S. Base Mixture. With the curve of the mesh against the wall, trowel from the center to the edges avoiding wrinkles until the mesh is fully embedded and not visible. Trowel smooth to a uniform thickness slightly more than the thickness of the reinforcing mesh. Note: The reinforcing mesh may be installed either vertically or horizontally. 13

14 c. Allow the I. S. Base material to take up until firm to the touch. Trowel a second tight coat of I. S. Base mixture over the first coat to fully cover the reinforcing mesh (see detail below). The result should be such that the I. S. Reinforcing Mesh is approximately centered within the base coat thickness. Do not allow the first pass to completely dry prior to the second pass application or an excessive amount of I. S. Base material will be necessary to fully coat the wall surface. Basecoat Layer 1 Basecoat Layer 2 Final Result 3. Single pass method (optional) a. Using a stainless steel trowel, apply the I. S. Base mixture on the entire surface of the insulation board, to an area slightly larger than the width and length of a piece of reinforcing mesh, in a uniform thickness of approximately 2.4 mm (3/32 in). b. Immediately place the I. S. Reinforcing Mesh against the wet I. S. Base material. With the curve of the mesh against the wall, trowel from the center to the edges avoiding wrinkles until the mesh is fully embedded and not visible. Trowel smooth so that the reinforcing mesh is fully covered and there is no mesh pattern visible. Tip: Corners and edges normally require light strokes with a small damp brush to smooth out irregularities. 4. The I. S. Reinforcing Mesh shall be installed continuously at corners and edges lapped not less than 64 mm (2 ½ in). Do not lap mesh within 200 mm (8 in) of a corner. 5. Protect completed work from water penetration and run-off. 6. Allow the base coat to cure a minimum of 24 hours before proceeding with application of the finish coat. Cool, damp conditions may require longer drying times. Do not apply finish to a wet or damp base coat. I. Panzer Base Coat; Panzer 20 mesh used in conjunction with I. S. Reinforcing Mesh. 1. Using a stainless steel trowel, apply the I. S. Base mixture on the entire surface of the insulation board to an area slightly larger than the width and length of a piece of Panzer 20 mesh to a uniform thickness of approximately 3.2 mm (1/8 in). 2. Immediately place the Panzer 20 mesh against the wet I. S. Base mixture. With the curve of the mesh against the wall, trowel from the center to the edges until the bare mesh is fully covered and not visible. 3. Continue in the same manner until the entire area requiring Panzer 20 mesh is covered. Caution: Do not lap the Panzer 20 mesh. Adjacent pieces are to be tightly butted. 4. Protect completed work from water penetration and run-off. 5. Allow the Panzer base coat to cure a minimum of 24 hours prior to applying the I. S. Reinforcing Mesh. 6. Apply a layer of I. S. Reinforcing Mesh over the cured Panzer layer in accordance with Section VII.H.1 through 6. Offset the edges of the I. S. Reinforcing Mesh from the edges of the Panzer mesh a minimum of 200 mm (8 in). Tip: If Panzer 20 Mesh is installed horizontally, we recommend that the I. S. Mesh be installed vertically and vice versa. VIII. Sealant Joint Preparation A. All Infinity surfaces which will be in contact with sealant must be coated with either Demandit or Color Prime coatings. 1. Stir Demandit or Color Prime to a smooth, homogeneous consistency. 2. Using a small brush, apply Demandit or Color Prime to the base coat surface that is to be in contact with the sealant. 3. Allow the Demandit or Color Prime to dry a minimum of 48 hours prior to applying Dow Corning Sealant. Cool, damp weather may require longer drying times. 4. Refer to Dow Corning "Procedure for the Installation of Dow Corning Silicone Construction Sealants with the Dryvit Infinity Systems" (Appendix B) for proper sealant system installation. 14

15 IX. Infinity Finish A. The following Dryvit Finishes are available for use as part of the Infinity System. 1. Infinitex QP, Infinitex SP, Infinitex SPF, Infinitex ADB 2. Ameristone, Stone Mist 3. Custom Brick B. Prior to applying the Dryvit Finish, the base coat must be allowed to cure a minimum of 24 hours and be dry and hard. Cure time may be longer depending on environmental conditions. C. Inspect the base coat for any irregularities such as trowel marks, board lines, rough corners and edges, and for proper reinforcing mesh embedment. Note: Correct all irregularities prior to applying the Dryvit Finish. D. Finish Application 1. General a. Important: The Dryvit Finishes must be installed continuously to a natural break such as corners, expansion joints, reveals, etc., or tape line. Mechanics must maintain a wet edge. Sufficient personnel and scaffolding must be provided to continuously finish a distinct wall area or cold joints will result. Scaffolding must be placed a minimum of 457 mm (18 in) from the wall to prevent staging lines. On hot, windy days, the wall may be fogged with clean potable water to cool the wall and facilitate finish application. As with other plaster-like materials, work should precede the sun. In other words, work the shady or cool side of the building. If this is not possible, scaffolding should be shaded with tarp or nursery shade cloth. Do not introduce water to the Finish material once it is applied to the wall. This will cause color variations. Each mechanic must use the same tool and hand motion and match the texture of the mechanics above, below and on each side. Caution: Do not apply Dryvit Finish in sealant joints. Refer to Section VIII for proper preparation of System termination at sealant joints. 2. Check the wall surface and ambient temperature to ensure that they are 4 C (40 F) and rising at the time of application. 3. Infinitex QP a. Mix the Infinitex Finish material as described in Section II.C.1. b. Using a clean, stainless steel trowel, apply a coat of Infinitex QP on the cured base coat to a thickness slightly larger than the thickness of the largest aggregate. c. Pull across using a horizontal trowel motion to develop a uniform thickness no greater than the largest aggregate of the material. d. The texture is achieved by uniform hand motion and/or tool that produces the texture to match the approved sample. Each mechanic must use the same tool and hand motion to ensure that the texture achieved is uniform over the entire wall area. 4. Infinitex SP and Infinitex SPF a. Mix the Infinitex Finish material as described in Section II.C.1. b. Using a stainless steel trowel, apply an even coat of Infinitex SP or SPF Finish to a thickness slightly thicker than the largest aggregate size. c. Pull across using a horizontal trowel motion to develop a uniform thickness no greater than the largest aggregate of the material. d. The texture is achieved by a uniform hand floating motion with a clean stainless steel trowel; wipe the trowel often and wet it lightly. Apply light pressure in a circular motion. 5. Infinitex ADB a. Using a brush, roller or airless spray equipment, apply color coordinated Color Prime to the cured base coat, at a uniform rate of m 2 /pail ( sq. ft./pail) and allow to dry. b. Mix the Infinitex finish material as described in section II.C.1. c. Using a stainless steel trowel, apply a leveling coat of Infinitex ADB to the wall surface and allow to take-up. d. Using a stainless steel trowel, apply a second coat of Infinitex ADB to obtain the desired texture. e. The maximum thickness, including texture, should not exceed 6 mm (1/4 in). Tip: An atomizing spray bottle may be used to apply a mist of water to the surface in the finishing step. 6. Ameristone - Refer to Dryvit publication DUK142 for complete application instructions. a. Using a brush, roller or airless spray equipment, apply color coordinated Color Prime to the cured base coat, at a uniform rate of m 2 /pail ( sq. ft./pail) and allow to dry. b. Mix the Ameristone as described in Section II.D.1. c. Ameristone should only be applied by a skilled mechanic experienced in the spraying of aggregate finishes. 15

16 d. Apply Ameristone using a hopper gun or other approved spray equipment in two passes (one horizontally, one vertically) to achieve uniformity. Allow one hour drying time between passes. e. Protect the Ameristone finish from weather for a minimum of 48 hours or until dry. f. Ameristone is a blend of natural aggregates and therefore a slight color variation may occur. Strict adherence to the Ameristone Application Instructions will minimize this effect. Refer to DUK142 for further instructions and tips for applying Ameristone. 7. Stone Mist - Refer to Dryvit publication DUK420 for complete application instructions. a. Using a brush, roller or airless spray equipment, apply color coordinated Color Prime to the cured base coat, at a uniform rate of m 2 /pail ( sq. ft./pail) and allow to dry. b. Mix the Stone Mist finish as described in Section II.D.1 just prior to application. c. Stone Mist should only be applied by a skilled mechanic experienced in the spraying of aggregated finishes. d. Using a stainless steel trowel, apply a tight coat of Stone Mist finish to the wall surface. e. While the trowel coat of Stone Mist finish is still wet, using a hopper gun or other approved spray equipment, spray additional Stone Mist directly to the trowel coat until all small trowel lines are covered. f. Protect the Stone Mist finish from weather for a minimum of 24 hours, or until dry. 8. For application of Custom Brick Finishes, refer to Custom Brick Application Instructions, DUK214 and DUK154. X. Maintenance A. General 1. Sealants and flashings shall be inspected on a regular basis and repairs made as necessary. B. Surface Damage 1. Any breaches of the Dryvit surface should be repaired as soon as possible following the instructions listed in Section XI. C. General Cleaning of Dryvit Surfaces 1. Protect adjacent materials and vegetation. 2. Prewet the soiled area with clean water and wash with a solution of 3.8 l (1 gal) of clean, warm water mixed with.23 l (8 oz) of Trisodium Phosphate (TSP). 3. Apply the cleaning solution using either a soft bristle brush or low pressure, washing equipment. When using a soft bristle brush, scrub the area using light pressure. NOTE: USE OF HARD SCRUBBING ACTION OR A HARD BRISTLE BRUSH WILL DAMAGE THE FINISH. When using power washing equipment, do not exceed 4140 kpa (600 psi) at the spray tip or 43 C (110 F) solution temperature. Note: Always use tips which provide at least 40 fan pattern and keep the spray tip at least 610 mm (2 ft) from the surface being cleaned. NEVER USE WATER BLASTING EQUIPMENT WHICH DELIVERS PRESSURES IN EXCESS OF 4140 kpa (600 psi) AT THE SPRAY TIP. EROSION OR DAMAGE FROM WATER BLASTING OR IMPROPER POWER WASHING COULD VOID THE INFINITY WARRANTY. 4. Thoroughly rinse the surface with clean water. 5. Alternate cleaning solutions are available from Sentry Chemicals, Max Products, ProSoCo and Surtec which have been found to be effective in cleaning Dryvit surfaces. Follow the cleaner manufacturer's instructions for proper use. D. Mildew or algae growth. 1. Protect adjacent materials and vegetation. 2. Prewet the affected area with clean water and wash with the following solution: a. 3.8 l (1 gal)of clean, warm water. b..23 l (8 oz) of Trisodium Phosphate (TSP). c..95 l (32 oz) of household bleach. 3. Apply the cleaning solution to the wall and allow to stand 2-3 minutes. In some cases, the mildew or algae will be removed without the need for scrubbing. 4. Thoroughly rinse the surface with clean water. 5. An alternate method is to apply the cleaning solution as detailed in Section X.A.2 above. 6. After treatment, rinse thoroughly with clean water. 7. Alternate cleaning solutions are available from Sentry Chemicals, Max Products, ProSoCo and Surtec which have been found to be effective in cleaning Dryvit surfaces. Follow the cleaner manufacturer s instructions for proper use. 16

17 XI. Repair Procedure A. Using a sharp utility knife, or circular saw with a masonry cutting blade, cut through and remove the lamina, exposing a neat uniform-sized area of insulation larger than the damaged area. Use a disk grinder or belt sander to remove the finish and expose the I. S. reinforced base coat approximately 75 mm (3 in) around the damaged area. An aluminum oxide disk or belt, 20 grit, is recommended. B. Cut out all remaining I. S. Insulation Board carefully. Note: If the DryShield ABA air barrier or Dens-Glass Gold sheathing is disturbed or damaged, it must be repaired as detailed in Section III of these instructions. C. Cut a piece of I. S. Insulation Board to fit tightly into the damaged area. Sand the edges of the I. S. Insulation Board for a precise fit. Note: Install the I. S. Insulation so that the vertical grooves align with the grooves in the existing insulation board. D. With a notched trowel 9.5 mm (3/8 in) by 13 mm (1/2 in) deep, apply the DryShield ABA mixture to the backside of the I. S. Insulation Board being careful not to allow the DryShield ABA mixture in the grooves of the board. Do not apply the adhesive on the edge of the insulation board. E. Press the I. S. Insulation Board against the DryShield ABA air barrier making sure that the face of the new insulation board is flush with the surrounding insulation board. F. Precisely mask the surrounding area with masking tape. Cut the reinforcing mesh so that it will cover the patch area, lapping onto the original reinforced base coat a minimum of 64 mm (2 1/2 in). G. Apply the I. S. Base mixture on the face of the I. S. Insulation Board, taking particular care to keep the base material mixture off the surrounding finish. Embed the reinforcing mesh in the wet I. S. Base mixture H. Using a small damp brush, smooth out irregularities and feather the edge of the base mixture. The reinforcing mesh must be totally embedded in the wet mix. When completed, the base coat should be recessed approximately 1.6 mm (1/16 in) from the face of the existing finish. This will insure that the new finish will apply flush with the existing finish. Wait a minimum of 24 hours to allow the base coat to cure. I. If necessary, again, precisely mask the surrounding existing finish with masking tape. J. Apply the new finish over the patch area and texture to match the surrounding finish. K. Allow the finish to dry for approximately one hour prior to removing the masking tape. The tape should be removed prior to the finish being totally dry. L. Feather the edges of the finish to blend inconspicuously with the surrounding texture. After the patch has dried, there may be a color variation between the patch and the surrounding area. This should become less noticeable as environmental conditions blend the areas together. Note: The Infinitex Finish should be ordered to match the original lot number shipped to the job. DISCLAIMER Information contained in this document conforms to standard detail and product recommendations for the installation of the Dryvit Infinity System products as of the date of publication of this document and is presented in good faith. Dryvit UK Ltd. assumes no liability, expressed or implied, as to the architecture, engineering or workmanship of any project. To ensure you are using the latest, most complete information, contact Dryvit UK Ltd., at Unit 4 Wren Park Hitchin Road Shefford, Bedfordshire SG17 5JD Dryvit UK Ltd. Unit 4 Wren Park Hitchin Road Shefford, Bedfordshire SG17 5JD Printed in USA R7: Dryvit UK Ltd. 1994