INSTALLATION GUIDE GUIDE TO ASC ISO-WALL CONSTRUCTION SYSTEM APPLICATION ISO-WALL SYSTEM. ASC Iso-Wall System Includes: Materials Required:

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1 ISO-WALL SYSTEM ACOUSTIC SCIENCES CORPORATION INSTALLATION GUIDE ASC Iso-Wall System Includes: 4" x 4" WallDamp Squares 1-1/2" x 48" WallDamp Strips 1-1/2" x 3" WallDamp RC Pads (optional) drc-1 (Damped Single-Leg Resilient Channels) drc-2 (Damped Double-Leg Resilient Channels) 1/2" x 1-3/4" Perimeter Gasket 1/4" x 1-1/4" Wall Bearing Felt Acoustical Sealant Materials Required: Panel Adhesive or Construction Adhesive 3" Insulation Blanket* 1-1/4" and 1-3/4" Drywall Screws 3/8" Type S Pan Head Screws 1/2" Regular Gypsum Wallboard 1/2" Moisture Resistant Wallboard Masking Tape Tack Nails / Staples / Screws (optional) Spray Adhesive (optional) Wire Insulation Supports (optional) * Insulation blanket with no paper or foil backing is recommended. See Instruction for detail. Information: Tel: Fax: W. 5th Ave, Eugene, OR See Iso-Wall installation FAQ at for additional assistance. GUIDE TO ASC ISO-WALL CONSTRUCTION SYSTEM APPLICATION REV 3/31/05 PAGE 1 OF 18

2 ISO-WALL SYSTEM ACOUSTIC SCIENCES CORPORATION PARTS LIST ISO-WALL SYSTEM MATERIALS: SAMPLE INSTALLATION PICTURES WALLDAMP SQUARES WALLDAMP STRIPS RC PADS ISO-WALL SYSTEM drc-1 drc-2 drc-2 drc-1 PERIMETER GASKET WALL BEARING FELT ACOUSTICAL SEALANT RC-PAD Be sure to familiarize yourself with the materials and methods prior to starting the actual installation. MISC. REQUIRED MATERIALS: PERIMETER drc-1 CONSTRUCTION ADHESIVE INSULATION BLANKET WALL BEARING FELT 1-1/4" & 1-3/4" DRYWALL SCREWS 3/8" TYPE S PAN HEAD SCREWS 1/2" REGULAR GYPSUM WALLBOARD 1/2" MOISTURE RESISTANT GYPSUM WALLBOARD WALLDAMP SQUARES MASKING TAPE TACK NAILS SPRAY ADHESIVE WIRE INSULATION SUPPORTS WALLDAMP STRIPS PAGE 2 OF 18

3 CEILING INSTALLATION [1] With panel adhesive, glue Perimeter Gasket around perimeter of ceiling. (Fig. 2A) Use tack nails (if needed) as extra holding strength while the adhesive dries. [2] Remove release paper on one side of 1-1/2" x 3" RC Pads* and apply them to the face of the ceiling joists where drc2's will be screwed on (Fig. 2A) Remove remaining release paper. * Note: pre-cut RC Pads may purchased through ASC or cut on site using the 1-1/2" x 48" WallDamp Strips. PAGE 3 OF 18

4 CEILING INSTALLATION (cont'd) [3] Press insulation blanket (not shown) into joist cavity. Insulation blanket with no paper or foil backing is recommended. If paper or foil backing is present, it should be glued to the ceiling with spray adhesive. If necessary, use wire insulation supports every 12" to 16" to hold up the blanket. [4] Fasten drc-2s perpendicular to ceiling joists with 1-1/4" drywall screws at each joist in both flanges. Channel spacing should be no more than 12" on centers. Keep Channels at least 6" from the wall /ceiling corner. Channels should end no more than 6" from final joist. (Fig. 3A) Splice channels directly over joists by overlapping (not butting) at least 1-1/2" and driving screws through both flanges into the joists (Fig. 3B). If channel overlap falls between joists, overlap channels at least 6" and fasten both channels near ends with 3/8" Type S Pan Head Screws. (Fig. 3C) TIP: Mark the location of the joists and the drc-2s on wall's top plates with masking tape at the ends of each joist. This will be helpful for later installation. PAGE 4 OF 18

5 CEILING INSTALLATION (cont'd) [5] Apply 1/4" bead of panel adhesive to face of the installed Perimeter Gasket strips. [6] Snap chalk lines on the wallboards to mark the location of the drc-2s and the joists. [7] Attach 1/2" Moisture Resistant wallboard perpendicular to drc-2s with 1-1/4" drywall screws 12" (max.)* on centers. Avoid driving the screws to joists by keeping the screws a minimum 2" distance from joists. (Fig. 4A) Note: Place the opposite (non-taping) side of the first layer board toward the interior of the room**. At the perimeter, screw wallboard to ceiling nailer 12" (max.) on centers through Perimeter Gasket strips. A 1/4" gap should be kept between ceiling wallboard and the top plates. Apply a bead of Acoustical Sealant to seal the gap. [8] Decide and visualize the layout for the second layer wallboard. We recommend this layer should go the same direction as the first layer (perpendicular to drc-2s). Joints between the two layers should be staggered, and centered over WallDamp Squares). Identify and mark where the joint seams will be. Note: If the second layer of wallboard needs to be orientated parallel to the drc-2s (opposite the first layer), be sure to space the drc-2s so the second layer wallboard seams align centered over the drc-2s. * California building code requires 6-8" (max) screw spacing on all wallboard. ** Finish side has tapered edges which prohibit adequate contact with WallDamp strips. PAGE 5 OF 18

6 CEILING INSTALLATION (cont'd) [9] Remove release paper from one side of the WallDamp Strips. Apply the strips over all the wallboard joint seams as well as around the ceiling perimeter. [10] Remove release paper from one side of the WallDamp Squares, starting about 6" in from the edges, apply the Squares to wallboard surface 12" on centers. (Fig. 5A) Note: Joints between the two layers of wallboard should be staggered, and centered over WallDamp Squares). Identify and mark where the joint seams will be. PAGE 6 OF 18

7 CEILING INSTALLATION (cont'd) [11] Attach 1/2" regular wallboard to drc-2s through the first layer Moisture Resistant wallboard with 1-3/4" drywall screws 12" (max.) on centers. Avoid driving the screws to joists by keeping the screws a minimum 2" distance from joists. (Fig. 6A). Note: We recommend this layer should go the same direction as the first layer (perpendicular to drc-2s) with the seams staggered. Place the tapered finished side of the board toward the interior of the room. At the perimeter, screw wallboard to ceiling nailing blocks 12" (max.) on centers through first layer wallboard and Perimeter Gasket strips. A 1/4" gap should be kept between ceiling wallboard and the top plates. Apply a bead of Acoustical Sealant to seal the gap. PAGE 7 OF 18

8 WALL INSTALLATION [1] Press insulation blanket (not shown) into stud cavity. Insulation blanket with no paper or foil backing is recommended. If paper or foil backing is present, it should be glued to the wallboard with spray adhesive. If necessary, use wire insulation supports every 12" to 16" to hold up the blanket. [2] Remove release paper from the 1-1/2" Wall Bearing Felt and glue it on floor around perimeter of room. Secure the Felt with tack nails if needed. Caulk with Acoustical Sealant below Felt if floor is irregular. PAGE 8 OF 18

9 WALL INSTALLATION (cont'd) [3] With panel adhesive, glue Perimeter Gasket strips onto edge of top /sole plates around wall perimeter as well as around openings, such as door and window headers, sills, etc. Use tack nails (if needed) as extra holding strength while the adhesive dries. [4] Remove release paper on one side of 1-1/2" x 3" RC Pads* and apply them to the face of the studs where drc-1's will be screwed on. (Fig. 8A) Remove remaining release paper. * Note: pre-cut RC Pads may purchased through ASC or cut on site using the 1-1/2" x 48" WallDamp Strips. PAGE 9 OF 18

10 WALL INSTALLATION (cont'd) [5] Fasten drc-1 (leg flange down) perpendicular to studs with 1-1/4" drywall screws at each stud. Channel spacing should be 24" (max.) on centers for studs 16" on centers, or 16" (max.) on centers for studs 24" on centers. Position Channels starting at least 6" from ceiling or floor. Channel ends should be held back from intersecting surfaces but cantilevered no more than 6" from studs. (Fig. 9A) Splice channels directly over studs by overlapping (not butting) at least 1-1/2" and driving screws through both channels into the studs (Fig. 9B). If channel overlap falls between studs, overlap channels at least 6" and fasten both channels near ends with 3/8" Type S Pan Head Screws. (Fig. 9C) TIP: Mark the location of the studs and the drc-1s on floor and ceiling with masking tape at the ends of each stud. This will be helpful for later installation. PAGE 10 OF 18

11 WALL INSTALLATION (cont'd) 6] Apply 1/4" bead panel adhesive to face of the installed Perimeter Gasket strips. [7] Snap chalk lines on the wallboards to mark the location of the studs and the drc-1s. [8] Attach 1/2" Moisture Resistant wallboard perpendicular to drc-1s with drywall screws 12" (max.) on centers. Avoid driving the screws to studs by keeping the screws a minimum 2" distance from studs. Note: Place the opposite (non-taping) side of the first layer board toward the interior of the room*. At the perimeter, screw wallboard to corner studs, top / bottom plates 12" (max.) on centers through Perimeter Gasket strips. A 1/4" gap should be kept between the wall and ceiling as well as all adjacent walls. Apply a bead of Acoustical Sealant to seal the gap. [9] Decide and visualize the layout for the second layer wallboard. We recommend this layer should go the same direction as the first layer (perpendicular to drc-1s). Joints between the two layers should be staggered, and centered over WallDamp Squares). Identify and mark where the joint seams will be. Note: If the second layer of wallboard needs to be orientated parallel to the drc-1s (opposite the first layer), be sure to space the drc-1s so the second layer wallboard seams align centered over the drc-1s. * Finish side has tapered edges which prohibit adequate contact with WallDamp strips. PAGE 11 OF 18

12 WALL INSTALLATION (cont'd) [10] Remove release paper from one side of the WallDamp Strips. Tape the strips over all the joint seams as well as perimeter of walls and openings. (Fig. 11A) [11] Remove release paper from one side of the WallDamp Squares, starting about 6" in from the edges, apply the Squares to wallboard surface 12" on centers. Note: Joints between the two layers of wallboard should be staggered, and centered over WallDamp Squares). Identify and mark where the joint seams will be. PAGE 12 OF 18

13 WALL INSTALLATION (cont'd) [12] Attach 1/2" regular wallboard perpendicular to drc-1s through the first layer Moisture Resistant wallboard with drywall screws 12" (max.) on centers. Avoid driving the screws to studs by keeping the screws a minimum 2" distance from studs. Note: Place the tapered finished side of the board toward the interior of the room. At the perimeter, screw wallboard to corner studs, top / bottom plates 12" (max.) on centers through first layer wallboard and Perimeter Gasket strips. A 1/4" gap should be kept between wallboard and the corner studs, or other framing members. Apply a bead of Acoustical Sealant to seal the gap. [13] Tape and apply drywall joint compound to wall and ceiling. PAGE 13 OF 18

14 ISO-WALL INSTALLATION NOTES Electrical outlets, light switches, and other in-wall/ceiling fixtures: It's a good idea to plan ahead before you begin your Iso-Wall installation. The final wall thickness in the system is roughly 1-5/8" from the face of the studs/joists. Place electrical and other junction boxes accordingly. When installing the wallboard in the Iso-Wall system, leave a 1/4" gap around any junction boxes or fixtures to be filled with acoustical sealant. This is the same method as for sealing around the wall/ceiling wallboard edges. When you have finished installing the system, apply another bead of acoustical sealant to the edges of each junction box or fixture, prior to applying any faceplates or coverings. PAGE 14 OF 18

15 (1) 3 INSULATION BLANKET (2) WALLDAMP BETWEEN RESILIENT CHANNEL AND STUD (3) DAMPED RESILIENT CHANNEL (drc-1) (4) 1-1/2 X ¼ WALL BEARING FELT (5) 2 X 1/2 PERIMETER GASKET (6) FIRST LAYER WALLBOARD SCREW TO drc-1 (7) 4 X 4 WALLDAMP SQUARE BETWEEN WALLBOARDS (8) 1-1/2 WALLDAMP STRIP AROUND WALL PERIMETER BETWEEN WALL BOARDS (9) 1-1/2 WALLDAMP STRIP OVER WALL BOARD JOINT BETWEEN WALLBOARDS (10) SECOND LAYER WALLBOARD SCREW TO drc-1 THROUGH FIRST LAYER WALLBOARD WALLDAMP TM APPLICATION SCHEMATIC DIAGRAM FOR ISO WALL TM CONSTRUCTION 7 PAGE 15 OF 18

16 ASC WALLDAMP CONSTRUCTION (1) DAMPED RESILIENT CHANNEL (drc-2) SCREW TO JOIST (WITH WALLDAMP STRIP IN BETWEEN) (2) PERIMETER GASKET ON CEILING (3) ACOUSTICAL SEALANT (4) WALLDAMP STRIP AROUND PERIMETER (5) PERIMETER GASKET ON TOP PLATE (6) WALLDAMP SQUARE BETWEEN WALL BOARDS (7) DAMPED RESILIENT CHANNEL (drc-1) SCREW TO STUD (WITH WALLDAMP STRIP IN BETWEEN) (8) WALLDAMP STRIP ON FACE OF JOIST (9) WALLDAMP STRIP AROUND PERIMETER (10) WALLDAMP SQUARE BETWEEN WALL BOARDS (11) WALLDAMP STRIP ON FACE OF STUD (12) 3 INSULATION BLANKET ASC ISO WALL CONSTRUCTION SECTION, WALL /CEILING DETAIL ISO WALL TM CONSTRUCTION AND WALLDAMP TM APPLICATION PAGE 16 OF 18

17 (1) 3 INSULATION BLANKET (2) DAMPED RESILIENT CHANNEL (drc-1) SCREW TO STUD (WITH WALLDAM STRIP IN BETWEEN) (3) WALLDAMP SQUARE BETWEEN WALLBOARDS (4) PERIMETER GASKET ON SOLE PLATE (5) WALLDAMP STRIP AROUND PERIMETER (6) WALL BEARING FELT (7) ACOUSTICAL SEALANT (8) WALLDAMP SQUARE BETWEEN WALLBOARDS (9) WALLDAMP STRIP ON FACE OF JOIST (10) WALLDAMP STRIP AROUND PERIMETER ASC ISO WALL CONSTRUCTION SECTION, WALL /FLOOR DETAIL ISO WALL TM CONSTRUCTION AND WALLDAMP TM APPLICATION ASC WALLDAMP CONSTRUCTION PAGE 17 OF 18

18 drc-1 TM SAMPLE SPACING FOR VARIOUS CEILING HEIGHTS (FOR STUDS 16 O.C.) 24" 21" 6" 6" 24" 24" 6" 7' 6" 21" 21" 21" 8' 6" 6" 24" 24" 24" 24" 6" 9' 21-1/2" 21-1/2" 21-1/2" 21-1/2" 21-1/2" 10' 6" 6" 6" 24" 24" 24" 24" 24" 6" 11" 22" 22" 22" 22" 22" 22" 12' 6" REVISED ACOUSTICS SCIENCES CORPORATION PAGE 18 OF 18