Installation Guide
Page 13
Warranty
TimberTech products are made exclusively from technologically advanced materials designed 
to provide years of use and enjoyment. TimberTech decking and railing products are covered 
by a 30-year limited warranty for residential applications and a 10-year limited warranty for 
commercial applications. TimberTech Legacy, Tropical, and Terrain decking is covered by a 30-
year residential limited fade and stain warranty. The products are guaranteed against splitting, 
splintering, rotting or structural damage from termites or fungal decay. For a complete copy of 
TimberTech warranties, visit TimberTech.com.
Care and Cleaning
Maintaining a clean, dry surface is the best method for 
combating mildew. Ensure that water drains effectively 
from your deck. For TimberTech TwinFinish, DockSider, and 
ReliaBoard, be sure that gaps exist between planks to allow 
for drainage. 
Cleaner
Cleaner that are recommended for mildew and/or heavy 
cleaning are:
  • Wash Safe Spray and Clean Composite Deck Cleaner
  • Resist Mist Composite Deck Cleaner 
Tannin Staining
Like any other wood-based product, TimberTech’s wood-
plastic composite products (ReliaBoard, TwinFinish, and 
DockSider) may experience a naturally occurring process 
called Extractive Bleeding/Tannins. This process may cause 
temporary discoloration that will weather away with exposure 
to flushing rainfall and UV. In most cases the weathering 
process takes 8-10 weeks but could vary depending on 
location and specific product application such as a covered 
porch. Tannins may also be cleaned by utilizing the cleaners 
referenced for Basic Cleaning Recommendations for 
ReliaBoard, TwinFinish, and DockSider. 
These guidelines may not cover every care and maintenance 
scenario encountered. For additional questions about care and 
maintenance, call 800-307-7780. 
Other Considerations: 
To keep your TimberTech deck looking its best, here are a few 
additional things to consider. Depending on environmental 
conditions. TimberTech product colors may appear to weather 
over time as part of the natural weathering process. 
Heat Buildup
Please be aware that excessive heat build on the surface of 
TimberTech products from external sources such as, but not 
limited to, fire or reflection of sunlight can potentially lead 
to damage. For example, sunlight which may be reflected 
by low-emissivity (Low-E) glass can potentially lead to 
damage of exterior building products, including TimberTech 
Deck, Rail, and accessories, due to elevation of surface 
temperatures which far exceed that of normal exposure of the 
same materials to direct sunlight. Possible damage by such 
reflected, concentrated light may include melting, sagging, 
warping, distortion, surface discoloration, increased expansion 
or contraction, and unusual weathering. Although TimberTech 
Deck products are cooler to the touch than many other deck 
board products in similar colors, all decking products will get 
hot in the sun. Additionally, the darker the decking color, the 
hotter it will feel. 
Static Electricity
The buildup of generation of static electricity is a naturally 
occurring phenomenon in many plastic based products such 
as carpeting, upholstery, and clothing, and can occur on 
alternative decking under certain environmental conditions. 
Snow & Ice Removal
AS with any walking surface, TimberTech decking products may 
become slippery in winter weather. Take caution when walking 
on your TimberTech deck in these conditions. Most products 
containing calcium chloride can be used without damage to the 
deck/porch surface. These products may leave a white residue 
which can be cleaned using the cleaning guidelines above. 
Metal shovels or plastic shovels with a metal leading edge 
may damage the surface of TimberTech decking and are not 
recommended for clearing snow from the deck surface. 
Important
Do not allow airborne dust from concrete, fiber cement 
products, landscape blocks, or any masonry product to 
accumulate on the surface of TimberTech Deck, Rail, and 
accessories as it may damage the surface of the deck. Do not 
cut any product on or near TimberTech Decking products. 
Always remove job site dust, clay, dirt, mud, and other 
construction dirt and debris to sit on the TimberTech Deck 
surface. Do not cut metal objects such as railing on the deck 
surface, the hot debris from the cut may become embedded in 
the deck surface resulting in staining and damage.










