Specification

Decorating For priming and decorating with paint, texture, or wallcovering, follow manufacturer’s directions for materials used.
All surfaces must be dry, dust-free, and not glossy. A prime coat of a USG primer product or a good-quality interior
latex flat wall paint with high solids content should be applied undiluted and allowed to dry before decorating.
Walls to be covered with wallpaper or vinyl wallcovering should be sealed per manufacturer’s recommendations.
To improve fastener concealment where gypsum panel walls and ceilings will be subjected to severe artificial or
natural side lighting and be decorated with a gloss paint (eggshell, semigloss or gloss), the gypsum panel surface
should be skim-coated with B
eadex
®
or Sheetrock
®
brand all purpose joint compound to equalize suction before
painting (see USG publication J510).
Filling and Finishing Grind high plane differences in concrete level with adjacent area; also remove any form oil, efflorescence and
Over Interior
greasy deposits. Prime exposed metal with a good rust-inhibitive primer. Fill offsets or voids with Silver Set
Poured Ceilings
lightweight setting-type joint compound. Apply additional coats of joint compound as necessary, after each coat
has set, but not necessarily dried to create crack-free fills that eliminate edge joining from showing through the
surface decoration. Take care to create a smooth surface, free of irregularities or sections that will be exposed to
sharply angled lighting. Apply a thick skim coat of S
ilver Set lightweight setting-type joint compound over entire
surface. Skim coat must be thick enough to prevent dryout before setting, or band failure may result. After the
final coat of joint compound has dried, apply an undiluted coat of a USG primer product or a good quality latex flat
wall paint with high solids content over entire surface and allow to dry. For textured ceiling, apply a USG ceiling
spray texture in a uniform coat at a rate not exceeding 10 ft.
2
/lb.
Use with Sheetrock
®
In areas to be tiled, for tapered edge joints, embed a USG joint tape with Silver Set lightweight setting-type joint
Mold tough
TM
compound 40 or 90. When set, apply a fill coat. Take care not to crown the joint. Wipe excess joint compound
Gypsum Panels
from the panel surface before it hardens. For butt joints and interior angles, embed fiberglass or paper joint tape
with S
ilver Set lightweight setting-type joint compound 40 or 90. A fill coat is not necessary. Again, take care not
to crown the joint. For fasteners, spot fastener heads at least once.
Fill and seal all openings around pipes, fittings, and fixtures with a thinned-down coat of tile adhesive. For best
results, use Type I Ceramic Tile Adhesive that meets ANSI A136.1 both as a sealer and to set the tile. With a
1 brush, apply the thinned compound onto the raw gypsum panel core at cutouts, and allow area to dry
thoroughly prior to application of tile. Before compound dries, wipe excess material from the surface of gypsum
panels. For areas not to be tiled, embed tape in the conventional manner. Finish with at least two coats of a
USG joint compound to provide joint finishing for painting and wallpapering.
Exterior Joint Treatment Mix Silver Set lightweight setting-type joint compound according to directions on bag. Do not overmix or use in
temperatures below 45 °F (7 °C). Prefill joints of S
heetrock exterior gypsum ceiling board with joint compound.
After prefill has set, embed paper joint tape, centered over joint. When compound has set, immediately apply fill
coat. Apply joint compound over flanges of zinc control joints, corner beads and metal trim. Spot fastener heads.
After fill coat has set, apply finishing coat of joint compound. Completely cover all joints, angles, beads, control
joints and fasteners. After joints have dried, apply one coat of a quality oil or latex exterior primer. Then follow with
at least one coat of a quality latex exterior paint.
Laminating Apply joint compound in the prescribed manner to back of face panels to be laminated. Laminate face
panels to (base layer panels) (coreboard) using moderate pressure and temporary nailing or shoring to
ensure adequate bond.
Finishing For painting and decorating, follow manufacturer’s directions for materials used.
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