Application Specification

Transcription

1 0BMETHOD TO USE WITH MORTAR BED AND APPLICATION OF TILE OR OTHER HARD SURFACES OVER PLYWOOD SUBSTRATES. Purpose and Scope Instructions for the surface preparation and application of Dex-O-Tex Dual-Flex double waterproof membrane system over previously prepared plywood substrates. This application specification is intended for use incorporating a mortar bed and subsequent installation of hard surfaces such as ceramic tile, marble, quarry tile, pavers, promenade roofs coverings, etc. Thickness Minimum 1-1/2 (12mm) 3-1/2 (87mm) depending on application and design. Approximate Quantity of Materials Required To Cover ONE HUNDRED SQ. FT (9.3 sq. Meters) Unit One Packaging Amount Spread Rate/ Require Mixed Gallon AF Bondcoat... As Required sf per gal Unit 2.5 for Flashing VL Primer sf per gal Unit 3 Elastatex sf per gal Resin Binder &Catalyst Conbase W-1 IV 36" sf per roll (Optional) Contex Paste gallon Water ½ 1 ½ Type I or II Cement lbs Silica Sand lbs. Pea Gravel lbs. Neobond Membrane sf per gal 1 st coat 25 sf per gal 2 nd coat RP Fabric Rl SF Per Roll RP Fabric, 8-10" rolls... As Required Width 300 lf Resistite Liquid 5 gal pails sf per gal Resistite Powder 55 lb. bgs bags sf per bag Caution: Actual coverage rates may vary dependant upon application methods, and individual application techniques Alternate: Dex-O-Tex Neobond Membrane, Barrier-Guard Membrane and CPC Membrane are interchangeable and are acceptable alternates to Neobond Membrane in this application. Option: Dex-O-Tex Dual Flex Membrane has several optional applications including options for thin set and mortar bed applications over both concrete and plywood substrates. See appropriate CPC Application Specification for additional information Brief of Installation 1. Prepare deck surface, Detail joints, or uneven areas. Waterproof sheet metal flashing, thresholds, terminations and transitions with Dual Flex Primary membrane and fabric reinforcement. 2. Pre-mix and apply primary membrane by notch trowel 3. Apply cleavage Membrane (Optional) 4. Mix and apply Contex mortar bed with 2 x 2 metal reinforcement to required thickness 5. Apply detail coat of secondary membrane with fabric reinforcement at transitions, termination and other areas as required 6. Apply secondary waterproof membrane with fabric reinforcement. 7. Apply protection coat. 8. Perform water test and validate performance. Surface Preparation A. Plywood must be exterior grade, sound, clean and dry. Plywood sheets must be securely fastened with deck screws, screw type nails, or ring shank nails and glued. Plywood sheets must be staggered so that no four corners come together. Plywood must be a minimum of 5/8 T & G (3/4 recommended). All edges and joints shall be blocked and mounted on joist with a maximum span of 16 O.C. Joints shall be open 1/16 and filled with G-26 and treated with a Dex-O-Tex Application Specification Page 1 of 7 Dual-Flex

2 detail coat of G-26 and synthetic fiber reinforcing fabric prior to application of the deck covering system. Crossfield Products Corp. DOES NOT RECOMMEND THE USE OF OSB IN LIEU OF PLYWOOD. Consult Crossfield Products for recommendations when covering OSB substrates. B. Other Surfaces. Dual-Flex may be applied over many other surfaces and substrates. Consult Crossfield Products Corp. for recommendations prior to application. 5BDrains, Flashings and Expansion Joints A. Drains should be arranged so proper drainage with the minimum of elevation change. Drains shall be Bi-Level type, metal cast body (i.e. DX Series DX2005, DX 2010 type or similar please refer to Crossfield Products Corp. Dex-O- Tex Dual-Flex Details). Drains shall be securely fastened and set for proper drainage. The lower drain flange should be flush with the level of the substrate B. Flashing: Proper flashing methods for Dex-O- Tex Dual-Flex vary according to the substrate and wall construction. All metal flashing shall be a minimum #26 ga. installed in accordance with SMACNA standards. All sheet metal flashing should be nailed 4 O.C. in a staggered pattern, with seams overlap a minimum of 3 and completely sealed with sealant or soldered and double nailed. Sheet metal shall be degreased, prepared and primed prior to application of the Dual-Flex Membrane system. Please refer to Crossfield recommended detail drawing for flashing onto stucco walls, wood siding, brick, or concrete tilt-up, C. Expansion Joints: Dex-O-Tex Dual-Flex should be terminated at through-slab expansion joints. Dual-Flex should not be installed over any expansion or seismic joints. Expansion joints are not part of this specification and are not supplied by Crossfield Products Corp. Expansion joints are not commonly required except by direction of architect's or design engineer's specified location. See Dex-O-Tex Details for interface with expansion joints. 6BJob Site Survey A. Perform moisture testing in accordance with one of the following methods: ASTM F1869 Standard Test Method for Measuring Moisture Vapor Emission Rate of Concrete Subfloor Using Anhydrous Calcium Chloride. Verify and document the results in accordance with the specification. If MVER exceeds 3 lbs./24 hrs./1000 sq. ft. and is under 10 lbs./24 hrs./1000 sq. ft., apply Dex- O-Tex VaporControl Primer 200 as per Application Specification S-970. If MVER exceeds 10 lbs./24 hrs./1000 sq. ft. and under 15 22* lbs./24 hrs./1000 sq. ft., apply VaporControl Primer 100 as per application specification S-972. ASTM F2170 Determining Relative Humidity in Concrete Floor Slabs Using in situ Probes. Verify and document the results in accordance with the specification. If the insitu relative humidity (rh) of the substrate is greater than 75% and less than 84%, apply Dex-O-Tex VaporControl Primer 200 as per Application Specification S-970. If the insitu relative humidity (rh) is greater than 84%, and less than 89 99%*, apply VaporControl Primer 100 as per Application Specification S-972. *Apply VaporControl Primer 100 at the specified thickness required as per Application Specification S-972 for the level of MVER or insitu relative humidity percentage of the substrate. B. Inspect Substrate to verify proper preparation before applying any materials. C. Survey the deck elevations to insure proper drainage. Minimum slope for drainage is dependant on which building code is enforced at the location of the project. The UBC requires ¼ per foot. The minimum slope required to provide drainage is 1/8 per foot. Dex-O-Tex Application Specification Page 2 of 7 Dual-Flex

3 D. Acquire a drainage plan from the tile setter showing the location of all control joints, berms, and crickets. Check the plan to determine the elevations required can be set properly with the existing construction. E. Measure and record ambient temperature and humidity, surface temperature and the temperature of the material being used at regular intervals thought out the duration of the project Do not proceed with the application if the conditions are outside the recommended parameters F. Prior to application of Dex-O-Tex Dual-Flex, the surrounding construction must be carefully inspected to insure that there is no source that would permit water to enter under the completed Dex-O-Tex installation. 1BEnvironmental Conditions All materials are mixed, applied and cured at the job site. Minimum environmental conditions are required to facilitate proper curing and Performance of the Products. Ensure conditions are in accordance with the following requirements. Ambient Min Max Temperature 45 O F 100 O F Relative Humidity 20% rh 85% rh Wind NA 30 mph Substrate Temperature 55 O F 90 O F Relative Humidity NA 80% MVER NA 3 lbs* Materials Temperature 63 O F 83 O F * 3 lbs of MVT, per 1000 sq. ft., during a 24 hr., period as measured by ASTM F1869. Materials should be delivered in original packages and containers with seals unbroken and bearing manufacturer's labels containing brand name and directions for storage and mixing with other components. Check materials immediately upon receipt; verify all the correct materials are in correct packaging and are accounted for in good condition. Sort the materials and store them in a tempered storage area. 2BDETAILING Most applications require the waterproof flashing to be installed prior to the application of the wall siding or counter flashing. Door thresholds and storefronts should also be detailed with waterproof membrane prior to placement of the threshold or storefront. Refer to Dex-O-Tex Details for recommended installation assemblies. A. Prepare and Prime Sheet Metal Flashing. Degrease galvanized flashing with vinegar, MEK or industrial degreaser; make sure all oily residues are removed. If the sheet metal is abraded in the preparation process prime with AF Bondcoat (See CPC Application Specifications for AF Bondcoat). If metal is not abraded apply Resistite bondcoat. And allow to cure. OPTION: Other metal may be used as required. Bonderized, Copper, Lead Coated Copper, and Stainless Steel flashing are often used in lieu of Galvanized sheet metal. Copper or Stainless Steel should be used when the project is within 3 miles from salt water or any other corrosive environment. B The transition from deck to the sheet metal flashing shall be treated with a detail coat of Elastatex 500 resin binder and reinforcing fabric prior to application of the deck covering system 3BSTEP ONE Bondcoat Application VL Primer Mix Ratio: 2A:1B Cure Time: 2 hrs Coverage: 350 ft² Pot Life: 2 hrs Recoat Time: 2 48 hrs DFT: 5 mils A. Mix together the following materials: VL Primer Comp A... (2 Two gal. can) VL Primer Comp B... (1 One gal. can) Completely empty the contents of Component A and Component B cans into a clean mixing container, scraping the sides and bottom of cans Dex-O-Tex Application Specification Page 3 of 7 Dual-Flex

4 to insure all materials are used. Mix with a low speed electrical mixer for approximately three minutes to a homogenous blend. B. Apply a thin coat of VL Primer using a trowel, squeegee, or roller over the area to be coated. Do not allow primer to puddle or be applied too thick. The above mixture should cover approximately 1050 square feet (350 ft². / mixed gallon) over smooth surface. If surface is very porous, two coats may be required. Allow VL Primer to dry for at least two (2) hours at 75ºF until it is no longer tacky (or only very slightly tacky) to the touch and can be knelt on. In warmer weather/surfaces, VL Primer may set up faster. In colder weather, it may set up slower. STEP TWO Elastatex 500 Primary Waterproof Membrane Elastatex 500 Resin binder Mix Ratio: 4 E500/1 water Pot Life: 35 min Cure Time: 4 hrs Recoat Time: 4 24 hrs Coverage: 35 sq ft DFT: 42 mils OPTIONAL - The use of a cleavage membrane is optional for projects in mild temperate locations. The cleavage membrane is only required where the project is subject to regular temporal changes over 50 O F in a 24 hour period, or when the dimension of the deck area is more than 50 feet in any one direction. A. The felt slip-sheet should be laid down on the entire deck area lapping over the sheet metal flashing to within two inches of all vertical projections or eaves. B. Lap each sheet of felt over the next by two inches (5.08 cm). Laps should shingle down hill for best results. Do not attempt this operation if strong, steady winds prohibit proper installation. C. After the slip-sheet is laid down and the slipsheet has properly relaxed, allow it to lay down properly without wrinkles or gaps (this process is quick in warm temperatures and slow in cool temperatures). Once the slip-sheet has relaxed proceed immediately to step two. A. Mix together the following materials: Elastatex 500 Resin Binder... 5 gallons Elastatex Accelerator... 1 ounce Clean Water... 5 quarts B. Mix with a low speed electrical mixer for approximately two minutes to a homogenous blend. After mixing add one (1 oz) bottle Accelerator (use warm water and add two bottles for fast cure or if temperature is below 60ºF.) and mix for an additional minute. Take care not to entrap air into the resin during the mixing process. Apply the mixed material to the deck using a notched trowel at a rate of 35 square feet per gallon. Do not apply thicker. The material will rapidly self-level, however care must be taken to apply the material evenly. Immediately after application backroll the area with a porcupine spiked roller. STEP THREE Cleavage Membrane STEP FOUR- Mortar Bed Contex, Cement, Sand, and Pea Gravel Mix Design: 1 Gallon Contex Paste 3.5 Gallons Clean Potable Water 94 lbs Type I or Type II Portland Cement 200 lbs #30 (or Blend) Silica Sand 50 lbs. Pea Gravel Recoat Time: 2 14 day s Pot Life: 45 min Coverage: 42 sq ft per 1 ½ Thickness Cure Time: hrs per ½ Thickness DFT: 1 ½ 3 A. Premix the Contex Paste to a homogenous blend, making sure that the polymer is well dispersed. Mix 1Gallon of Contex Paste with approximately 3.5 gallons of clean potable water. B. Premix all dry powders. Mix together 1 bag Cement (94 lbs), 2 bags #30 silica sand (200 Dex-O-Tex Application Specification Page 4 of 7 Dual-Flex

5 lbs.), and 50 lbs of clean washed and dried 3/8 pea gravel. Mix in to a well blended composite. C. Pour the premixed liquid into a clean mixing vessel. Slowly add the pre-blended powder into the liquid. Mix until all the powder is well wetted out and the mixture is free from lumps or clumps of unmixed powder. This mixture should be a wet through out and be easily trowel into a dry pack mortar bed. NOTE: The amount of water can be adjusted slightly to allow for personnel preference of the consistency of the mortar. The amount of water can be from gallons per mix. D. Screed the mortar mix into place at elevations that allow for positive drainage. Compact into place and finish to a smooth even finish with a steel trowel. E. Provide expansion joints at all perimeters and predetermined locations at a minimum of 12 on center in both directions. More joints must be provided where extreme temperature differences can be expected. Fill all joints with closed cell backer rod and a single component moisture cure polyurethane sealant. F. Detail the perimeter and all joints, transitions and terminations with a fabric reinforced coat of Neobond membrane. Apply waterproof detail coat using 10" (25 cm) strips of R.P. Fabric and embedding them in Neobond using a stiff brush, making sure fabric is completely embedded into the Neobond. STEP FIVE - Secondary Membrane Neobond Membrane with Fabric Reinforcement Mix Ratio: Sgl Comp Pot Life: 50 mins Cure Time: 8 hrs Recoat Time: 8 36 hrs Coverage: 65 S.F. DFT: 25 mils R.P. Fabric 1000 SF per Roll A. Neobond Membrane, 5 gal. pail (single component ): Premix the material by stirring the material thoroughly with a drill motor and a jiffy mixing blade. Once material is poured out the workability time is approximately 50 minutes although this may be less in high temperatures. Material that has not been poured out may be saved by tightly resealing in the original container. B. Apply Neobond Membrane over the field of the deck just as it comes from the can. Spread over the mortar bed using a notched squeegee in an even, uniform coating at the rate of 65 square feet per gal. The Membrane may also be spread by roller, trowel or brush. C. After the membrane has cured, Apply a second coat of Neobond membrane with fabric reinforcement. Spread the Neobond, with a trowel, slighter wider then the width of the roll R. P. Fabric. Embed the R. P. Fabric into the Neobond membrane. Once the fabric is placed, work the material up through the weave of the fabric, being sure to pull out all wrinkles. Apply additional material to level-up the surface and provide a continuous film of membrane over the fabric. D. Finished dry film thickness of the membrane should be 40 mils. minimum. Allow to dry for 24 hours. If the membrane is still slightly tacky, workers should wrap their shoes with polyethylene film before walking on surface. If additional coats are required to achieve thickness, reapply additional membrane as required. 7BSTEP SIX Protection Coat Resistite Mix Ratio: 1gal:16 ½ lb Pot Life: 25 mins Cure Time: 4 hrs Recoat Time: 4 48 hrs Coverage: 60 SF per Gal DFT: 40 mils Resistite is applied over the waterproof membrane and serve as the protection layer for the secondary membrane of the Dual-Flex system. A. For Resistite application, mix together the following: Resistite Liquid Resistite Powder 5 gals. 1½ bags (82.5 lbs.) Dex-O-Tex Application Specification Page 5 of 7 Dual-Flex

6 Pre-Blend the Resistite liquid to insure all polymer is evenly dispersed. Pour the liquid into the mixing vessel and slowly add the powder while continuously mixing. Blend these materials together thoroughly with an electric drill motor and jiffy blade into a smooth even mix free from lumps or clumps. The above mix of Resistite should cover 300 sq. ft. (27.91 sq. meters). Apply the Resistite immediately upon completion of mixing. B. Pour the mixed material onto the deck surface. Using flat bladed squeegees or steel trowel to spread the material into a smooth even finish. NOTE: In high temperatures the Resistite can flash set due to high surface temperatures from the black membrane. The Resistite should be applied early in the morning or late in the afternoon to avoid this flash setting. Flash set can adversely affect adhesion of the protection coat. Cautions for Safe Handling of Latex Systems: 1. Always obtain, read and observe Manufacturer s Safety Data Sheets (MSDS) before using materials handling epoxy materials. Become familiar with the products on paper before you open the cans. 2. Read and observe precautionary statements on product labels. 3. Keep containers tightly closed. 4. Keep out of reach of children. 5. For industrial use only. Do not allow applications by untrained workers. 6. Remove contaminated clothing and shoes. Wash clothing before re-use. 7. Use of safety goggles and dust masks is recommended. See MSDS for detailed recommendations. DEX-O-TEX PRODUCT LINE Crossfield Products Corp. West Coast Office East Coast Office 3000 E. Harcourt Street 140 Valley Road Rancho Dominguez, CA Roselle Park, NJ Dex-O-Tex Application Specification Page 6 of 7 Dual-Flex

7 fax fax Hwww.dexotex.com Dex-O-Tex Application Specification Page 7 of 7 Dual-Flex