Georgia-Pacific DensShield Tile Backer - Manual (Page 9)

DensShield Tile Backer Installation Instructions
9
Countertops
Plywood must be installed flat and level. Framing spacing should
not exceed 249 (610 mm) o.c. Install minimum
1 ⁄
2
9
(12.7 mm)
exposure 1 plywood on top of supports spaced a maximum of
249 (610 mm) o.c. Provide support on overhangs on cantilever
counters to prevent movement.
apply leveling bed of latex portland cement mortar to plywood
using
1 ⁄
4
9
(6.4 mm) notched trowel.
Laminate clean, dry DensShield ® Tile Backer to base (grey side
up) and fasten every 69 (152 mm) to 89 (203 mm) o.c. in both
directions into plywood while leveling bed is still fluid. Use either
1
1 ⁄
4
9
(32 mm) galvanized roofing nails or 1 1 ⁄
4
9
(32 mm rust-
resistant drywall screws. Stagger joints of DensShield Tile Backer
panels with those of the plywood base.
Butt DensShield Tile Backer joints tightly. Tape all joints and
corners using 29 (51 mm) wide self-adhering fiberglass mesh tape.
embed tape with latex portland cement mortar (aNSI a118.4).
Install tile, expansion and control joints and grout in accordance
with aNSI a108. Use latex portland cement mortar to set tile.
Countertops
Residential
Minimum Minimum
Subfloor Thickness Joist Spacing
5 ⁄
8
9
(15.9 mm) Plywood Sturd-I-Floor ® * 169 (406 mm) o.c. joists
5 ⁄
8
9
(15.9 mm) Plywood Sturd-I-Floor ® *
19.29 (488 mm) o.c.
engineered lumber
7 ⁄
8
9 (22 mm) aPa rated Sturd-I-Floor ®
249 (610 mm) o.c.
engineered lumber
* 3 ⁄
4
9 (19 mm) OSB is acceptable.
Subfloor & Joist Spacing Recommendations
DS006
Latex Portland Cement Mortar
Tiles
DensShield ® Tile Backer
Base Min. 1 ⁄
2
9
(12.7 mm) Plywood
Framing Support