USG DIAMOND Veneer Basecoat Plaster - Manual (Page 3)

Application Monolithic Concrete Prepare the surface with USG Plaster Bonder applied according to the directions. Fill all
(continued) voids and depressions with D IAMOND Brand Veneer Basecoat Plaster and allow to set and partially dry. Then apply
D IAMOND Brand Veneer Basecoat Plaster as with gypsum base or concrete block (above). Important: As no suction
is provided over surfaces treated with the plaster bonding agent, it is essential that the applied basecoat surface
be raked or broomed once the material has become firm for a rough and open surface to provide proper suction
for the finish coat. Failure to do so may result in delamination of the finish material.
F IBEROCK Brand Abuse-Resistant Panels Veneer Plasters provide increased resistance to abrasion, indentation and
penetration when used over F IBEROCK Brand Abuse-Resistant Panels in commercial and institutional applications
such as schools and high-traffic retail locations. Depending on expectations for abrasion, indentation and impact
resistance, the finish plaster may also be I
MPERIAL Brand Finish Plaster, D IAMOND Brand Interior Finish, R ED T OP
Finish or any lime-gauging finish combination.
In this two-coat veneer plaster system, D IAMOND Brand Veneer Basecoat Plaster and one of the finishes indicated
above are applied over F IBEROCK Brand Abuse-Resistant Panels attached to framing. Space wood or steel framing
16
Љ o.c. or 24Љ o.c. Position all ends and edges of panels over framing members, except when joints are at right
angles to framing members, as in perpendicular application or when end joints are back-blocked. On walls, fas-
teners are spaced a maximum of 12
Љ o.c. when framing spacing is 24Љ o.c., or 16Љ o.c. when framing spacing is
16 Љ o.c. For ceiling applications, nails should be spaced no more than 7Љ o.c., screws, 12Љ o.c. Prior to treatment
of panel joints, apply USG Plaster Bonder in a continuous film to joint area according to application directions.
Joints of the panels are treated using S HEETROCK Brand Joint Tape and a S HEETROCK Brand Setting-Type Joint
Compound (D URABOND or E ASY S AND ). Provide an additional coat of setting-type compound to fully conceal the
tape. Allow to completely dry. When the joints are completely dry, treat the entire wall surface with USG Plaster
Bonder according to the application directions. Then apply D
IAMOND Brand Veneer Basecoat Plaster 1/16 Љ to
3/32 Љ thick using scratch and double-back technique. This is accomplished by applying a tight, thin coat over
the entire area, and immediately doubling back with plaster from the same batch to achieve full thickness. When
basecoat plaster is firm, broom the surface to leave it rough and open for finish. With basecoat set and partially
dry, apply I
MPERIAL Brand Finish Plaster using a scratch and double-back technique. Complete finishing when
material is firm. Leave finished surface smooth and dense for decorating.
Note that 5/8 Љ F
IBEROCK Brand Abuse-Resistant Panels can be substituted for 5/8 Љ I
MPERIAL Brand Gypsum Base,
F IRECODE Core, or 1/2 Љ I
MPERIAL Brand Gypsum Base, F IRECODE C Core, in any fire-rated design as long as 20-
gauge steel framing is used and the above joint treatment procedure is followed.
D UROCK Brand Cement Board Veneer Plasters provide superior abrasion resistance and very good indentation and
impact resistance when used over D UROCK Brand Cement Board in commercial and institutional applications
such as schools and high-traffic retail locations. Depending on expectations for abrasion, indentation and impact
resistance, the finish plaster may be I
MPERIAL Brand Finish Plaster, D IAMOND Brand Interior Finish, R ED T OP Finish
or any lime-gauging finish combination.
In this two-coat veneer plaster system, D IAMOND Brand Veneer Basecoat Plaster and one of the finishes indicated
above are applied over D UROCK Brand Cement Board attached to framing. Space wood or steel framing 16
Љ o.c.
Install D UROCK Brand Cement Panels with long edges either parallel or perpendicular to the framing and with the
rough side of the panels exposed. Fasteners are spaced a maximum of 8 Љ o.c. Prior to treatment of panel joints,
apply USG ™ Plaster Bonder in a continuous film to joint area according to application directions. Joints should
then be treated with S HEETROCK Brand Joint Tape and S HEETROCK Brand Setting-Type Joint Compound (D URABOND
or E ASY S AND ). Joint surfaces must be treated with a separate coat of joint compound to fully conceal the
paper tape. When the joint is completely dry, treat the entire wall surface with USG Plaster Bonder according
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