Installation Guide

Page 4
Fastening Methods
TimberTech Square Shouldered Planks
TimberTech recommends the use of TimberTech TopLoc
Face Fasteners for square shouldered plank installations.
Pre-drilling is required when within 1-1/2” of the ends of the
plank and for temperatures below 45 degrees Fahrenheit
to avoid splitting and screw shear. Alternate fasteners are
stainless steel or high-quality coated composite deck screws.*
Terrain, Tropical, Legacy, TwinFinish, and ReliaBoard Planks:
Use TOPLoc Face Fasteners or a minimum #8 x 2-1/2” stainless steel
or other high-quality coated composite deck screws.*
DockSider: Use TOPLoc Stainless Steel or a minimum #8 x 3”
stainless steel or high-quality coated deck screws.*
Cortex Hidden Fastening System may also be used for the installation
of square shouldered planks. Reference Page 10 for uses and
restrictions.
Fastener Mushrooming:
This may occur when a non-composite deck screw is driven into the
decking. It can be greatly reduced or eliminated by using a screw
designed for composite lumber. When installing TimberTech decking,
using TOPLoc reduces chance of mushrooming. If mushrooming
occurs, we recommend pre-dimpling the plank by drilling a hole
slightly smaller in diameter than the screw head and as deep as the
screw head before driving the screen. If mushrooming occurs, stop
installation and call 1-800-307-7780 for technical support.
*TimberTech does not recommend any fastener that is not explicitly
stated in the TimberTech Decking Installation Guide. Use of any
alternative fastener does not void the TimberTech warranty; however,
if a decking failure is caused by using one of these alternative fastening
methods, any corresponding claims will be denied.
TimberTech Fascia and Riser Boards
Using screws with proper installation of TimberTech
Fascia provides the best long-term holding. TimberTech
recommends the use of TimberTech TOPLoc Fascia Fasteners
for best results. Refer to gapping requirements on page 3 for
proper installation.
For Use with TOPloc Fascia Fasteners:
Using the TOPLoc Fascia Bit, pre-drill 2” from the top and
bottom alternating a maximum of 12”. It is recommended
that screws are evenly spaced for the best look.
Terrain Collection
5.360”
.94”
Reliaboard
5.360”
.94”
TwinFinish
5.360”
1”
Tropical and Legacy Collections
5.360”
.94”
Docksider
5.5”
1.25”
Fasteners should be installed perpendicular to the deck surface and driven flush; do not overdrive or splitting will
occur. Always double joists at butt seams.
Do not toe screw deck planks as this will cause splitting.
• Set fascia in place being sure to follow proper gapping
requirements.
• Drive TOPLoc fascia fastener 90 degrees with the fascia
surface so that the screw head is flush with the surface.
Do not completely torque down screw; screw should
serve as a hanging mechanism to allow for expansion and
contraction in the fascia.
• Continue fastening in pattern described being sure to work
left to right or right to left. This will ensure flatness in the fascia.
• If preferred, TopLoc Fascia Fasteners may be installed 2
every 12", 2" from the top and bottom.
12"
Always be sure to check and cut the factory cut ends
of all boards to ensure they are square.
*Board dimensions
may vary slightly,
manufacturing
tolerances will
apply.