Screw board in place securely with screws spaced according to manufacturer's recommendations.
Double Layer Gypsum Board:
1. Fasten base layer to studs or furring with screws, and attach face layer using laminating adhesive and screws, applied according to manufacturer's instructions.
2. Offset face-layer joints at least 10 inches from parallel base-layer joints.
3. Screw both layers to metal supports at double layer ceiling applications and where required for fire-rated construction.
3 Water-Resistant Gypsum Board:
Complete plumbing rough-in before gypsum board panels are erected.
Separate gypsum panels from rough-in and fixtures by 1/4 inch space.
Make necessary cut-outs and seal cut or exposed panel edges with
thinned-down ceramic tile adhesive or with waterproof flexible sealant, as recommended by gypsum board manufacturer.
Install water-resistant board horizontally.
Do not place water-resistant board directly over vapor retarder.
Prior to tile application, fill openings around pipes, fittings, fixtures,
interior angles and other penetrations with waterproof flexible sealant, as recommended by gypsum board manufacturer. Do not fill 1/4 inch gap at bottom of panels.
Cementitious Backer Board Installation:
Install as indicated to comply with ANSI A108.11 and in accordance
with manufacturer's instructions.
Complete plumbing rough-in before boards are erected.
Separate board from rough-in and fixtures and fill space as
recommended by manufacturer.
Securely fasten boards to substrate as required.
Follow manufacturer's instructions for treatment of edge terminations.
At joints and corners, embed fiberglass tape in skim coat of mortar.
Erect gypsum board shaft liner for use as temporary shaft enclosure.
Screw attach base and face layers according to manufacturer's