Use And Care Manual

20 | ProForm Finishing Products
Five Levels of Finish for Gypsum Board
•
The weight, texture, and sheen level of wallcoverings applied over this
level of finish should be carefully evaluated. Joints and fasteners must
be adequately concealed if the wallcovering used is of lightweight
construction, contains limited pattern, has a sheen level other than
flat, or any combination thereof. Unbacked vinyl wallcoverings are not
recommended over this level of finish.
•
All joints and interior angles shall have tape embedded in joint
compound 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.
Notes
•
All joints and interior angles shall have tape embedded in joint
compound and shall be immediately wiped with a joint knife
leaving a thin consistent 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. 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.