Installation Guide

Page 5
SPANNING
• AZEK Trim and Moulding products must not be used in load bearing applications, but may be used in
spanned applications such as fascias, soffits and ceilings. For optimal performance, AZEK Trim and
Mouldings should be installed over a solid backing.
 FOR SOFFIT INSTALLATIONS:
• For spans greater than 16” OC, see below.
• When using AZEK Beadboard, see considerations below.
 FOR CEILING INSTALLATIONS:
• For spans greater than 16” OC, see below.
• If temperature at time of installation is 40˚F or below, spans need to be decreased to 12”.
• When using AZEK Beadboard, see consideration below.
• AZEK BEADBOARD SPANNING CONSIDERATION:
• For both 1/2” and 5/8” AZEK Beadboard, run boards perpendicular to structure when possible to
create the shortest possible run of material.
• When using 1/2” AZEK Beadboard, use 12” OC framing as well as a high quality construction grade
polyurethane adhesive on joists.
– For spans greater than 12” OC, use 5/8” AZEK Beadboard or use a minimum 1/2” backer such as
plywood or OSB with construction grade adhesive and mechanical fastening a minimum of every 8”.
Fasteners should hit joist or framing when possible.
• When using 5/8” AZEK Beadboard, use 16” OC framing as well as a high quality construction grade
polyurethane adhesive on joists. For spans greater than 16” OC, see below.
• For spans greater than 16” OC, use a minimum 1/2” backer such as plywood or OSB with construction
grade adhesive and mechanical fastening a minimum of every 16”. Fasteners should hit joist or framing
when possible.
• Never span AZEK products more than 16” without utilizing instructions above. Proper fastening will help
reduce the possibility of excessive movement from expansion and contraction.
• With all Beadboard or Trim ceiling and soffit installations, follow good building practices and ensure
adequate ventilation is provided.
WATER TABLE
Mechanically fasten water table to trimboard and wall structure
according to standard AZEK Trim and Moulding Guidelines.
Fasten in center (top to bottom) of nailing ange
Apply AZEK Adhesive
to join Water Table to
Trimboard
Adhesive
IMPORTANT: Flash according to water barrier manufacturer
guidelines. Use common accepted building practices to prevent
water inltration.
SIZE
• 2
3
⁄4” x 2” in 18’
lengths
• 1
1
⁄2” tapered starter
strip/nailing ange
height
•
3
⁄8” thick starter
strip/nailing ange
(at its thickest point)
Fasten trimboard according to standard
AZEK Trim guidelines.
Installation Guidelines for AZEK
®
Trim and Moulding