Crane Composites CLEANROOM WALL SYSTEM - Manual (Page 4)

NEW GYPSUM BOARD OR DRYWALL
New gypsum should not be painted or primed.
Tapered joints need only a fi ll and taped coating using a setting joint compound. A fi nish
coat is not necessary or desirable. Any extremely uneven areas should be fi lled. Remove all drywall dust.
PLYWOOD
Plywood walls must be fl at and even, and warped plywood should be removed and replaced. Solvent-Free adhesive cannot be used on
any installation over pressure treated or fi re-rated plywood.
CONCRETE BLOCK AND BRICK
Concrete block and brick wall surfaces are by nature uneven, and FRP panels installed directly to these surfaces will likely develop
loose spots, bulges and buckles. An alternate method is to install gypsum board, cement board or another appropriate substrate over
the furring and then install FRP panels according to the standard installation instructions. If it is the owner or contractor’s preference
to install FRP panels directly to a concrete block or brick wall, it is recommended that the panels be installed with Crane Advanced
Polymer Adhesive.
NON-POROUS SURFACES
Non-porous surfaces (i.e., ceramic tile, glazed block, moisture resistant substrates, and metal panels) do not provide a good surface
for adhesive bonding. General-purpose latex-based, polymer or solvent-based adhesives will not dry properly on a non-porous surface.
Advanced polymer is recommended in these applications. Installation over this type of surface can be accomplished with rivets or you
may contact an adhesive manufacturer for additional recommendations.
Environmental Considerations
The following special conditions require additional preparation or installation techniques:
DIRECT SUNLIGHT
Prolonged Direct Sunlight on panels may cause abnormal fading and/or rapid expansion depending upon amount of heat buildup. Use
caution in these areas.
HIGH HUMIDITY ROOMS
Acclimate panels in the operating humidity conditions. Carefully follow the guidelines in this installation guide for expansion/contraction
spacing and sealing. (see Expansion Joint Chart, pg 5). Failure to seal moisture entry points with silicone sealant can cause swelling
of the substrate resulting in warping, curling, delamination or bond line separation. Use an adhesive that is recommended for high
humidity conditions. A vapor barrier (e.g. 6 mil poly sheet) may be required. *Follow the architect or owner’s specifi cations or check your
local building codes for specifi c requirements.
LOW TEMPERATURE CONDITIONS
Acclimate panels in the operating temperature conditions. Carefully follow the guidelines in this installation guide for expansion/
contraction spacing and sealing (see Expansion Joint Chart, pg 6). Use an adhesive that is recommended for low temperature
conditions.
A vapor barrier (e.g., 6 mil poly sheet) may be required. Follow the architect or owner’s specifi cations or check your local
building codes for specifi c requirements.
FOAM INSULATION
An approved thermal barrier system (e.g., gypsum board) must be used between the FRP
panels and any foam insulation
(Figure 2) . Check your local building codes for specifi c
requirements.
NEAR HEAT SOURCE
FRP panels will discolor when installed behind or near a heat source
which radiates
temperatures exceeding 130°F (55°C), such as cookers, ovens, and deep fryers. Stainless
steel is recommended for these types of areas.
Choose an Adhesive
The following information provides assistance on selecting the appropriate adhesive for installation:
CRANE ADVANCED POLYMER ADHESIVE
Porous and most non-porous substrates, Interior and exterior applications, Fiberglass faced, mold resistant and fi recode core drywall,
drywall, steel, foamboard, vinyl, PVC, FRP,ceramic tile, laminate, sealed and unsealed concrete
CRANE FAST GRAB ADHESIVE
Porous substrates, Interior drywall applications, Non-treated plywood
Figure 2
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