Installation Guide

20
Installation Guide
All joints and interior angles shall
have tape embedded in joint com-
pound and shall be immediately
wiped with a joint knife leaving
a thin coating of joint compound
over all joints and interior angles.
Two (2) separate coats of joint
compound shall be applied over
all flat joints and one (1) separate
coat of joint compound shall
be applied over interior angles.
Fastener heads and accessories
shall be covered with three (3)
separate coats of joint compound.
The surface shall be smooth and
free of tool marks and ridges.
Where glass mat and/or fiber
reinforced gypsum panels are
installed, refer to the gypsum panel
manufacturer for specific finishing
recommendations.
Jobsite mock-up(s) shall be used to
determine acceptance of the finish
within the building.
Note: It is recommended that the
final decoration specification (e.g.,
painting specification) include the
application of a priming material
prior to the decoration.
Level 5
Typically specified in appearance
areas where smooth wall designs
are decorated with non-flat paints
(i.e., sheen/gloss) or other glossy
decorative finishes, dark/deep
tone paints are applied, or critical
lighting conditions occur. The
design professional shall specify
the mock-up procedure and mock-
up construction details within the
project documents. This level of
finish is the most effective method
to provide a uniform surface and
minimize the possibility of joint
photographing and/or fasteners
showing through the final decoration.
All joints and interior angles shall
have tape embedded in joint com-
pound and shall be immediately
wiped with a joint knife leaving
a thin consistent coating of joint
compound over all joints and inte-
rior angles. Two (2) separate coats
of joint compound shall be applied
over all flat joints and one (1) sep-
arate coat of joint compound shall
be applied over interior angles.
Fastener heads and accessories
shall be covered with three (3)
separate coats of joint compound.
A thin skim coat of joint compound
(see “Skim Coat” in Comments) or
a material manufactured especially
for this purpose shall be applied to
the entire surface. The surface shall
be smooth and free of tool marks
and ridges.
Where glass mat and/or fiber
reinforced gypsum panels are
installed, refer to the gypsum panel
manufacturer for specific finishing
recommendations.
Jobsite mock-up(s) shall be used to
determine acceptance of the finish
within the building.
Note: It is recommended that the
final decoration specification (e.g.,
painting specification) include the
application of a priming material
prior to the decoration.
For more information, refer to the
Gypsum Association document
GA-214.
Notes
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