13
DE
C
K
IN
G
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.
See previous page for Trex-recommended Fascia
fasteners.
Always refer to manufacturing instructions first for
installation methods. If instructions are not specific, refer
to the diagram below. Always remember to gap fascia
properly. A secondary glue is not required when using
these fasteners.
NOTE:
Instructions below reflect the use of Trex-
recommended fascia fasteners. If using deck boards as
fascia, refer to the recommendations in next column on
this page.
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"
Cent
er
Cent
er
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.
NOTE: Construction methods are always improving. Please refer to www.trex.com for the most up-to-date installation requirements.
Decking
Fascia
Decking
Fascia
Install fascia
UNDER
decking
edges/ends. This will provide
protection to the fascia/
framing seam as well as
optimize the aesthetics of
the installation.
Do Not
install fascia in the
method shown here. The
fascia board must be
attached fully to the rim
joist and cannot run parallel
to the decking surface.
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