| Interior Panels - Light Stain First coat: Pigmented resin sealer (wiped off when tacky).
Second coat: Clear resin sealer.
Third coat: Tinted undercoat; thin enamel;
pigmented sealer; or light stain applied thinly and wiped to the desired color depth;
color as selected.
Fourth coat: Interior satin varnish (additional
coats can be applied as desired of depth of luster).
PANEL STORAGE AND HANDLING
Like all building materials, APA trademarked structural
wood panels should be properly stored handled and installed to assure superior
in-service performance.
Protect the edges and ends of panels especially tongue-and
-groove and shiplap-edged panels. Place panels to be moved by forklift on pallets or bunks
when received to avoid damage by fork tines.
Panels to be transported on open truck bed should be
cover with standard tarpaulins. For open railcar shipment, use "lumber wrap" to
avoid extended weather exposure.
Store panels whenever possible under a roof, especially if
they won't be used soon after received. Keep sanded and other appearance grades away form
open doorways, and weight down the top panel in a stack to help avoid any possible
warpage from humidity. If moisture absorption is expected, cut steel banding on panel
bundles to prevent edge damage.
Panels to be stored outside should be stacked on a level
platform supported by 4x4 stringers or other blocking. Never leave panels or the
platform in direct contact with the ground. Use at least three full-width supports along
the eight-foot length of the panel-one centered and the others 12 to 16 inches from each
end.
Cover the stack loosely with plastic sheets or tarps.
Anchor the covering at the top of the stack, but keep it open and away from the sides and
bottom to assure good ventilation. Tight coverings prevent air circulation and, when
exposed to sunlight, create a "green-house" effect which may encourage mold
formation.
Notes to Specifiers (Continued):
(19) See APA Product Guide: Performance Rated Sidings, E300.(20) Hot-dipped or hot-tumbled galvanized steel nails are recommended for
most siding applications. For best performance, stainless steel nails or aluminum nails
should be considered. APA tests also show that electrically or mechanically galvanized
steel nails appear satisfactory when plating meets or excess thickness requirements of
ASTM A641 Class 3 coatings, and is further protected by yellow chromate coating.
Note: Galvanized fasteners may react under wet conditions
with the natural extractives of some wood species and may cause staining if if left
unfinished. Such staining can be minimized if the siding is finished in accordance with
APA recommendations,or if the roof overhang protects the siding from direct exposure to
moisture and weathering.
(21) Specify MDO plywood with one face of Medium Density
Overlay as descried in Voluntary Product Standard PS 1.
(22) Semitransparent stains may be used on plywood face
grades 303-OC , 303-NR and 303-6-W. Other 303 face grades should not be finished with
semitransparent stains unless specifically recommended by the panel manufacturer.
(23) Only latex formulations are recommended on APA 303-SR
and 303-NR grades of plywood siding. |
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