Specification

Directions Preparation In cold weather during gypsum panel joint ﬁnishing, minimum surface, water, mix, and air temperature of 45 °F

must be ensured until joints are completely dry. Adequate ventilation shall be provided to carry off excess moisture.

Gypsum Panel Position and apply Sheetrock

Brand Gypsum Panels in accordance with manufacturer’s recommendations.

Joint Treatment

Mix compound according to directions on bag. If using Sheetrock Brand Gypsum Panels, SW Edge, preﬁll the

“V” grooves formed by abutting tapered eased edges of the panels with

eaSy Sand 45 or 90. Apply compound

directly over “V” groove with a ﬂexible 5" or 6" joint ﬁnishing knife. Wipe off excess compound that is applied

beyond the groove. Allow preﬁll compound to harden prior to the next application (tape-embedding coat).

Cover joint with a thin layer of compound and embed tape, leaving about 1/32" of compound under

feathered edge and a thin layer over the tape. After compound has set, apply second coat, feathering out

approximately 2" beyond ﬁrst coat. After setting, apply third coat, feathering out 2" beyond second coat.

After each coat is applied, smooth away any tool lap marks or other imperfections prior to hardening action.

Finish corner bead and inside corners as required with at least two coats, feathered and smoothed out onto

panel faces.

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

Sheetrock Brand First Coat or a

good-quality interior latex ﬂat wall paint 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 ready mix conventional weight All Purpose or UltraLighweight All Purpose

joint compound to equalize suction before painting (see publication J510).

Filling and Finishing over Grind high plane differences in concrete level with adjacent area; also remove any form oil, efﬂorescence, and

Interior Poured Ceilings

greasy deposits. Prime exposed metal with a good rust-inhibitive primer. Fill offsets or voids with joint

compound. Apply additional coats of joint compound as necessary, after each coat has set, but not necessarily

dried. After the ﬁnal coat of joint compound has dried, apply an undiluted coat of

Sheetrock Brand First Coat or

a good quality latex ﬂat wall paint over entire surface and allow to dry. For textured ceiling, apply

Sheetrock

Brand Ceiling Spray Texture–QT in a uniform coat at a rate not exceeding 10 ft.

/lb.

Exterior Joint Treatment Mix joint compound according to directions on the bag. Do not overmix or use at temperatures below 45 °F

(7 °C). Preﬁll joints of

Sheetrock Brand Exterior Gypsum Ceiling Board with compound. After preﬁll has set,

embed

Sheetrock Brand Joint Tape centered over joint. When compound has set, immediately apply ﬁll coat.

Apply compound over ﬂanges of zinc control joints, corner beads, and metal trim. Spot fastener heads. After ﬁll

coat has set, apply ﬁnishing coat of compound. Completely cover all joints, angles, beads, control joints, and

fasteners. After the compound has dried, apply one coat of a good-quality oil or latex exterior primer. Then follow

with at least one coat of a good-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.