Specification

PermaBASE
®
Cement Board
LI M I TAT I O N S
Interior
• Treat joints with alkali-resistant berglass mesh tape set in a
modied mortar.
• Do not use conventional paper gypsum board tape, joint compound
and gypsum board nails or screws.
• Do not treat joints with mesh tape or waterproong fabrics
embedded in liquid waterproong.
• Do not exceed 16" (406 mm) o.c. as maximum wall framing spacing.
Must be designed to limit deection to L/360 under all live and dead
loads.
• Steel framing must be minimum 20-gauge (galvanized) (.0312"
design thickness) or heavier.
• PermaBASE is not a water barrier. Consult local building code for
moisture-barrier requirements.
• Do not use with vinyl ooring.
• To install interior direct-applied nishes to PermaBASE, you must
embed reinforcing mesh in basecoat. Consult nish manufacturer
for additional requirements.
• Do not expose PermaBASE to temperatures over 220˚F (105˚C).
• Do not use PermaBASE as a nailing base for other nishes.
Exterior
• To install properly, follow the instructions of the nish material
manufacturer.
• For conventional Portland cement plaster systems, use a self-furring
metal lath over PermaBASE and fasten it to studs.
• Install a code-approved Weather Resistant Barrier (WRB) to protect
the cavity. The type and placement will vary per local building
codes and/or manufacturer’s specications, installation guidelines
and warranties.
• Do not use PermaBASE as a nailing base for other nishes.
Cement Board Stucco Wall System (CBSS)
• Follow nish material manufacturer’s instructions for proper
installation.
• Treat joints in PermaBASE with mesh tape and basecoat.
• Thin veneer construction can reveal planar irregularities in framing.
• Minor cracking at joints may become visible in nished exterior surface.
• Exterior nishes applied directly to PermaBASE: Reinforcing
mesh must be embedded in basecoat (consult exterior nish
manufacturer for additional installation requirements).
• Code-Approved Weather Resistant Barrier (WRB) must rst
be installed to protect the cavity (type and placement will vary
per local building codes and/or manufacturer’s specications,
installation guidelines and warranties).
Cement Board Masonry Veneer Wall System (CBMV)
• Sheathing selection and installation varies according to type of wall
construction.
• Code-approved Weather Resistant Barrier (WRB) must be installed
to protect the cavity (type and placement will vary per local building
codes and/or manufacturer’s specications, installation guidelines
and warranties).
• Treat joints with alkali-resistant berglass mesh tape set in a
modied mortar.
• Follow mortar manufacturer’s instructions for proper installation.
Handling and Project Conditions
• Avoid water exposure during shipping, handling, storage, installation
and after installation of cement boards to avoid the formation of
mold or mildew.
• Store cement boards o the ground and under cover. Store boards
at. Use sucient supports extending under the entire length of
cement boards to prevent sagging.
• Keep cement boards dry to minimize the potential for mold growth.
Take adequate care while transporting, storing, applying and
maintaining cement boards.
• Do not apply cement boards with visible signs of moisture damage
or mold growth. Do not apply cement boards over other building
materials where conditions exist that are favorable to mold growth.
Maintenance Following Application
• Maintain essential elements of sound weather-tight building
envelope, including roong, joint sealants, windows and ashings.
• Take immediate and appropriate remediation measures as soon as
water leaks or condensation sources are identied.
• Perform routine cleaning and maintenance operations using
methods that prevent moisture saturation of cement boards.
• Maintain nal wall nishes to protect the cement board as well as
support the structure.
SIZES AND PACKAGING
Thickness, Width and Length # of Pcs. per Unit
1/2" x 32" x 5' (12.7 mm x 813 mm x 1,524 mm) 50*
1/2" x 32" x 8' (12.7 mm x 813 mm x 2,438 mm) 30
1/2" x 36" x 5' (12.7 mm x 914 mm x 1,524 mm) 50
1/2" x 36" x 6' (12.7 mm x 914 mm x 1,829 mm) 50*
1/2" x 36" x 8' (12.7 mm x 914 mm x 2,438 mm) 30*
1/2" x 48" x 8' (12.7 mm x 1,219 mm x 2,438 mm) 30
5/8" x 36" x 5' (15.7 mm x 914 mm x 1,524 mm) 40
5/8" x 48" x 8' (15.7 mm x 1,219 mm x 2,438 mm) 24
3/8" x 48" x 8' (9.5 mm x 1,219 mm x 2,438 mm) 40*
3/8" x 36" x 5' (9.5 mm x 914 mm x 1,524 mm) 50*
3/4" x 48" x 8' (19.1 mm x 1,219 mm x 2,438 mm) 20*
* Special Order
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