Installation Guide

Page 5
TimberTech Solid Planks
Earthwood Evolutions
®
, Twin Finish
®
, Reliaboard
®
, and Docksider
®
Important Information
To get information on other TimberTech products, visit
timbertech.com or ask your dealer for these installation guides:
• TimberTech planks are intended to be installed embossed
side up. The unembossed surface is not to be used as a
walking surface. This applies to all decking surfaces.
• The serrated bottom side of TwinFinish is great for accents
like benches and flower boxes.
• In areas with obstructed airflow such as roofs and on-
grade applications, a minimum of 1-1/2” sleeper system
supported by and connected to the substructure over which
the deck is built is required.
• To aid water run-off, the deck should slope 1/2” for every 8’
away from the house.
Solid Plank Installation Instructions
• Install from the outside edge of the deck and work toward
the house.
• Fasten 3/4” from the outside edge of each plank, using two
screws per joist including end joints.
• For gapping requirements, see page 3.
• The ends of the planks must fall on a joist. Always double
joists at butt seams. Do not toe screw deck planks as this will
cause splitting.
• Always install fasteners perpendicular to plank surface and
drive flush. Do not overdrive or splitting and mushrooming
may occur.
• Pre-drilling is required when within 1-1/2” of the ends of the
plank and for temperatures below 45 degrees Fahrenheit to
avoid end splitting and screw shear.
TOPLoc Face Fasteners are recommended for best results.
Further instructions available in TOPLoc Package.
Special conditions will require an engineering inspection and/or
reduced spans. Always consult local building codes.
Standard Joist Spacing
90° Angle 30° Angle 45°Angle
100psf 24" 24" 24”
90° Angle 30° Angle 45° Angle
100psf 20" 18" 16"
100psf 16" 14" 12"
TwinFinish
ReliaBoard , Earthwood Evolutions, EE Terrain, EE Legacy
DockSider
3/4”
3/4”
Directional Notch
TwinFinish, ReliaBoard, DockSider, Earthwood Evolutions,
TwinFascia and TwinRiser Boards:
Some TimberTech product surfaces are directional in manner. A
notch has been added to one side of the planks. When installing
planks, this marked edge must be laid to the same side for the
entire installation for a consistent appearance. The TwinFascia
board has one long edge beveled on the front and back. To
ensure a consistent appearance from board to board when
installing the TwinFascia, the beveled edge must be laid to the
same side. If you rip a piece of TwinFascia be sure to note the
location of the bevel on the ripped piece to ensure consistency.
Identification
Mark
Bevel
Bevel