Installation Guide

Page 3
USE TWO FASTENERS ON
EACH SIDE OF JOINT
• 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 flat, 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 profiles
must be glued to a substrate and mechanically fastened.
• AZEK BEADBOARD AND COLUMN WRAP 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
FASTENING
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.
Installation Guidelines for AZEK
®
Trim and Moulding