Installation Guide

25
DECKING
TREX
®
FASCIA INSTALLATION RECOMMENDATIONS
Trex Fascia utilized around the perimeter of a deck must
be gapped with the same requirements as Trex decking
to allow for air flow and expansion/contraction of the
fascia.
When Using Approved Fascia Fasteners:
NOTE: The fasteners listed below can only be used with
1x8 or 1x12 fascia product, and cannot be used with
decking product that is being used as fascia trim or stair
risers.
Trex recommends the use of Starborn® DeckFast® Fascia
System, SplitStop™ Fascia Screws or Simpson Strong-Tie®
Fascia Board Screws, for all composite Trex fascia profiles.
For near water applications, you can also use Fascia
System HeadCote® stainless steel screws. Refer to
manufacturer recommendations for specifics if this is
required.
Always refer to manufacturing instructions first for
installation methods. If instructions are not specific, refer
to the below diagram. Always remember to gap fascia
properly. A secondary glue is not required when using
these fasteners.
NOTE: The above fasteners can ONLY be used with
fascia profiles. If using deck boards as fascia, refer to the
recommendations in next column on this page.
Optimal installation method (not shown) is using square
edge decking as a border, overlapping the rim joists
approx. 1” in picture framing pattern around decking
perimeter. This will allow fascia to be installed UNDER the
square edged decking, adding protection to the fascia/
framing seam and hiding the board ends from view.
This optimizes both fascia performance as well
as the aesthetics of the installation.
TIPS:
» 10" rim joists (represented below unless noted)
allow for an easier and more aesthetically pleasing
installation.
» Miter cuts at butt joints and corners allow for a more
aesthetically pleasing installation (end-to-end
gapping rules still apply).
If Using other Fasteners and/or Using Decking product
in Fascia/Stair Riser Applications:
While Trex prefers the previous methods of
attachment, as these are the very best options, there
are also other recommendations that can be followed
for fascia or deck boards being used for fascia. Use
three Trex recommended composite decking screws
every 12". ALWAYS refer to manufacturer instructions
to ensure that recommended screws can be used for
fascia applications. The top screw should be placed 1"
from the top of the rim joist, the second screw in the
center of the rim joist, and the third screw 1" from the
bottom of the rim joist.
**IN ADDITION, also use a
weather-resistant,
construction-grade adhesive
(adhesives that work with
wood will work with Trex
products) as a SECONDARY
fastener when attaching
fascia. Remember to wipe
away any excess before it
dries or is allowed to drip on other Trex surfaces.
1"1"
Center
Center
1"
1"
12"12"
Gap end-to-end
1/8" (>40°F)
3/16" (<40°F)
Abutting Gap
1/4" (>40°F)
1/2" (<40°F)
1" x 8"
Fascia
(2" x 8"
rim joist)
18"18"
18"18"
1" x 12"
Fascia
All Fascia profiles when using
Non-Approved Fascia Fasteners**
All Fascia profiles when using
Non-Approved Fascia Fasteners**
Miter Cut
1/8" (>40°F)
3/16" (<40°F)
3
***Weather-resistant
Adhesive
NOTE: English measurements are shown,
convert to metric measurements if necessary.