AZEK Trim Moulding User Manual
TRIM MOULDING DECK PORCH RAIL PAVERS
AZEK Trim & Moulding
Install Guide
Storage & Handling, Cutting, Drilling, Routing ............................................................................ 2
Fastening, Expansion & Contraction .............................................................................................. 3
Painting, Gluing .................................................................................................................................. 4
Spanning, Water Table ..................................................................................................................... 5
Garage Door Thermostop, Rabbeted Cornerboard .................................................................... 6
Universal Skirt Board, Integrated Drip Edge ................................................................................ 7
Installing Finish Grade Trim ............................................................................................................. 8
Notes ....................................................................................................................................................10
• These guidelines cover the general installation recommendations for AZEK Trim and AZEK Moulding. See
specic installation information for Universal Skirt Board, Integrated Drip Edge, Rabbeted Cornerboard,
Column Wrap, Finish Grade Trim, Water Table, and Garage Door Thermostop.
• AZEK Trim and AZEK Mouldings should be installed using the same good building principles used to install
wood trim and mouldings and in accordance with the local building codes and the installation guidelines included below. AZEK Building Products Inc. accepts no liability or responsibility for the improper installation
of this product.
• AZEK Trim and AZEK Moulding may not be suitable for every application and it is the sole responsibility of
the installer to be sure that AZEK Trim and Mouldings are t for the intended use. Since all installations are
unique, it is also the installer’s responsibility to determine specic requirements in regards to each trim and
moulding application.
• AZEK Building Products recommends that all applications be reviewed by a licensed architect, engineer or
local building ofcial before installation. If you have any questions or need further assistance, please call
AZEK Customer Service at 877-ASK-AZEK (877-275-2935) or visit our website at www.azek.com.
Installation Guidelines for AZEK Trim and AZEK Moulding
STORAGE &
HANDLING
• Store AZEK Trim and Moulding products on a at and level surface.
• Since AZEK Trim and Moulding products are more exible than wood, they may conform
to uneven surfaces. Ensure that storage areas, as well as all framing and substructures,
are at and level to minimize uneven surfaces.
• AZEK Trim and Moulding products have a density comparable to pine and should be
handled in a fashion as pine would be handled to avoid damage.
• Units of AZEK Trim and Moulding products are shipped from the manufacturer in a
protective covering. If covering has been removed, take care to keep product free of
dirt and debris at jobsite. If product gets dirty, clean after installation.
CUTTING
• AZEK Trim and Moulding products can be cut using the same tools used
to cut lumber.
• Carbide tipped blades designed to cut wood work well. Avoid using ne
tooth metal cutting blades.
• Rough edges from cutting may be caused by excessive friction, poor
board support, or worn or improper tooling.
DRILLING
• AZEK Trim and Moulding products can be drilled using the same tools
used to drill lumber.
• Drilling AZEK Trim and Moulding products is similar to drilling a hardwood.
Care should be taken to avoid frictional heat build-up.
• Periodic removal of AZEK shavings from the drill hole may be necessary.
ROUTING
• AZEK Trim and Moulding products can be routed using standard router
bits and the same tools used to rout lumber.
• Carbide tipped router bits are recommended.
• Routing AZEK Trim and Moulding products provides a crisp, clean edge.
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Installation Guidelines for AZEK Trim and AZEK Moulding
FASTENING
• For best results, use fasteners designed for wood trim and wood siding. These fasteners
have a thinner shank, blunt point, and full round head.
• A #8 trim screw may be used and works well with AZEK Trim and Moulding products.
• To take advantage of the performance of AZEK Trim and Moulding products, use a
highly durable fastener such as stainless steel or hot dipped galvanized.
• Staples, small brads, and wire nails must not be used.
• The fasteners should be long enough to penetrate the solid wood substrate a minimum
of 1 1/2".
• Standard nail guns work well with AZEK Trim and Moulding products. If using pneumatic
tools, the air pressure should be regulated so fasteners slightly penetrate the surface.
• Like wood, use 2 fasteners per every framing member for trimboard applications.
Trimboards 12” or wider, as well as sheets, will require additional fasteners, not to
exceed 8” on center. See illustration below.
• Fasteners must be installed within 2” of the end of each board. See illustration below.
• There must be 2 fasteners on each side of a board joint (scarf, miter, etc.).
• All fasteners must hit a solid framing member.
• AZEK Trim and Moulding products should be fastened into a at, solid substrate.
Fastening AZEK material into hollow or uneven areas must be avoided.
• Pre-drilling is typically not required unless a large fastener is used or product is installed
in low temperatures.
• 3/8” and 1/2” AZEK Sheet product is not intended
to be ripped into trim pieces. These proles must be
glued to a substrate and mechanically fastened.
• AZEK BEADBOARD FASTENING CONSIDERATIONS
(Use one of the following):
• #7 trim screw
• 16 gauge T-nail
• 15 gauge round head (for 1/2” Beadboard only)
• Fasteners should be a minimum of 1 1/2” in length
USE TWO FASTENERS ON
EACH SIDE OF JOINT
EXPANSION &
CONTRACTION
• AZEK Trim and Moulding products expand and contract with changes in temperature.
• Properly fastening AZEK Trim and Moulding material along it’s entire length will
minimize expansion and contraction.
• When properly fastened, allow 1/8” per 18 feet of AZEK Trim and Moulding products for
expansion and contraction. Joints between pieces of AZEK Trim and Moulding material
should be glued to eliminate joint separation. See “Gluing”.
• When gaps are glued on a long run of AZEK Trim and Moulding material, allow
expansion and contraction space at ends of the run.
• AZEK Trim and Moulding should be glued to a substrate and mechanically fastened to
help minimize expansion and contraction.
• WARNING: Dark colors may increase movement and expansion and contraction of PVC
Trim and Moulding.
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Installation Guidelines for AZEK Trim and AZEK Moulding
PAINTING
• AZEK Trim and Moulding does not require paint for protection, but accepts and holds
paint very well.
• If you choose to paint, use a 100% acrylic latex paint with colors
having a Light Reective Value (LRV) of 55 or higher.
• For darker colors (LRV of 54 or lower) use paints with heat
reective characteristics specically formulated for use on vinyl/
PVC products. These paints/coatings are designed to reduce
excessive heat gain.
• WARNING: It is recommended that should you choose to paint a
darker color (LRV of 54 or lower) all aforementioned installation
steps should be followed.
• Follow the paint manufacturer’s recommendations for use and
compatibility with AZEK Trim and Mouldings.
• AZEK Trim and Moulding surfaces must be clean, dry, and void of
any foreign material such as dirt, oil, grease or other contaminates
that may come from normal handling, storage and/or installation
prior to painting.
• Moisture cycling is a main reason for paint failure on wood. Since
AZEK Trim and Moulding material absorbs almost no moisture,
paints last longer on AZEK Trim and Moulding products than it
does on wood.
• Since AZEK Trim and Moulding products have almost no moisture absorption, paints
may take longer to cure than on wood. Generally paints used on AZEK Trim and
Moulding products will be dry to the touch quickly, but may take up to 30 days to
fully cure depending on the humidity and temperature.
100% Acrylic Latex
with LRV 55 or
higher.
Use specically
formulated paints
for darker colors
(LRV 54 or lower).
GLUING
• For best results, glue all AZEK-to-AZEK joints such as window surrounds, long fascia
runs, etc., with AZEK Adhesive to prevent joint separation.
• The glue joint should be fastened on each side of the joint to allow adequate
bonding time.
• AZEK Adhesive has a working time of 10 minutes and will be fully cured in 24 hours.
• If standard pvc cements are used, these products typically cure quickly which will
result in limited working time and may reduce
adhesive strength.
• For best results, surfaces to be glued should
be smooth, clean and in complete contact
with each other.
• For best results, always use a scarf joint with
two fasteners on each side instead of butt
joints.
• To bond AZEK Trim and Mouldings to other
substrates, various adhesive may be used. Consult adhesive manufacturer to
determine suitability.
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