Composite Decking FAQ

Whether you’re interested in learning more about composite decking or looking for the right material for an outdoor living project, it’s natural to have questions. That’s why the experts at Envision Outdoor Living are here to provide the answers to the most frequently asked questions about composite decking.

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Take a look below to have your questions about composite decking answered and be sure contact our team if you need any more information.

• Composite decking is a manufactured material that is made of wood fibers wrapped in plastic and typically held together with a bonding agent. While most decks use treated lumber for the framing and foundation, using composite decking on the surface offers outdoor living spaces enhanced durability and style.

• One of the main advantages of using composite decking is that its average lifespan is 25 to 30 years, with a good chance of lasting even longer. Why is this the case? It’s because composite decking is extremely durable and requires the least maintenance compared to other products on the market.

• Composite decking is made from a plastic film usually comprised of polypropylene or polyethylene that’s blended with natural wood fibers to create a durable material. Plus, all Envision composite decking is made with an EverGrain core. This unique element creates composite decking that’s more resistant to splitting, splinters, insects, and rot.

• While traditional wood is still one of the most popular choice for decking materials, it often struggles to hold up over the years without a strict maintenance routine. Even though composite decking has a higher up-front cost, the material is known for its durability and low maintenance. Envision composite decking boards for example even have a deep, non-repeating grain, that replicates the beauty found in nature.

• On average, composite decking costs between $35 to $65 dollars per square foot. While composite decking can be more costly up front than traditional wood, it offers higher durability and less maintenance. Plus, Envision Outdoor Living offers a variety of composite decking collections that can fit almost any budget.

• With Envision composite decking, it is not recommended to use rock salt. It’s best to let the ice melt naturally to avoid the risk of the rocks damaging or scratching the surface of the deck.

• It’s usually best to let the ice melt off your composite deck naturally if possible. On the occasions where you need to clean off a composite deck in the winter, using a push broom to clear the snow is a great choice. Be sure to avoid using any shovels with a metal edge. These tools can bite into the deck causing damage. You’ll also want to clean off any leftover residue from ice melting as soon as possible.

• Unlike a traditional wooden deck, Envision composite decking does not need to be water sealed. All a composite deck needs a regular washing and clearing of any debris.

• Some composite decking can be painted but Envision Outdoor Living does not recommend it. Envision composite decking collections have a color combination for nearly any style, and sports a deep, non-repeating grain.

• You can power wash Envision composite decking, but it’s important to use a power washer with less than psi at the nozzle. For the best results, it helps to use a wide tip nozzle and holding the machine at least 12 inches off the deck surface. With Envision composite decking, only a light cleaning with a lower pressure power washer is enough to keep outdoor living spaces looking great.

• Composite decking made by Envision Outdoor Living is not hard to install. Envision deck boards are finished products, meaning you won’t have to cut around imperfections like you do with traditional wood. Plus, Envision composite decking come with detailed installation instructions created by outdoor living experts. Whether you’re doing a home DIY project or an experienced contractor, installation is easier since all Envision decking collections have the same dimensions.

• Envision composite decking is the only decking on the market that use compression molding technology during the manufacturing process. This proprietary process uses tremendous heat to create a strong bond between the cap and the core. It also presses a deep non-repeating grain into each deck board, creating composite decking that captures a natural beauty while also being durable. The density of the board has a better feel for anyone walking on it.

• At Envision Outdoor Living, we believe that the compression molding process produces a board that can stand the test of time. The compression technology also gives us the opportunity to put a deep non-repeating grain pattern into the product that offers a more realistic look. It’s a tried-and-true method that Envision has been using to create composite decking that’s a finished product.

• The simple answer is that Envision composite decking doesn’t need to be wrapped on all 4 sides. All our deck boards are built with the longstanding EverGrain Core. While some manufacturers recommend wrapping or sealing the edges of their deck boards, Envision is uncompromising when it comes to the quality of the core material in our capped boards.

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Can TimberTech® AZEK Decking be used near water?

Yes. TimberTech® AZEK Decking is the ideal material to use around water because it’s capped polymer decking, making it resistant to rot and decay caused by moisture. It’s comprised of 100% synthetic materials, so it’s not susceptible to moisture related deterioration commonly seen with wood. Its composition protects it against rotting, warping, and cupping—all water-related issues.If you want to include a water feature in your deck plan, TimberTech® AZEK capped polymer decking is the perfect material to choose.

What Colors are available for TimberTech® Deck?

We offer a whole range of Colors and styles, from sleek and modern, to traditional, to rustic. You can even bring indoor flooring looks to the outdoor deck. TimberTech® Deck has one of the widest selections of styles and Colors to choose from, ranging from light natural shades, to neutrals, to deep rich Colors of the tropics. There’s sure to be a look that complements your home’s exterior. Review our decking collection to see all available Colors, swatches, and inspiration.

What is TimberTech® Deck made of?

TimberTech® offers a range of decking material options including high-quality composite decking made of a combination of plastic and wood fibers, and a premium decking made of 100% PVC material.

Will TimberTech® Decking get mold on it?

Yes, TimberTech® Decking can get mold on it. Depending on environmental conditions of moisture and temperature, mold and mildew can appear on any outdoor surface. However, mold and mildew on TimberTech® decking only occurs on the surface of the boards and does not penetrate through the deck board. Surface mold and mildew on TimberTech® Deck can be removed using a cleaner such as Chomp®, Zep 505®, Simple Green®, Krud Kutter®, or a 1-to-4 mixture of bleach and water. Apply cleaner or mixture directly to affected area, use a stiff nylon bristle scrub brush, and scrub the area until the mold or mildew is removed. Rinse the area thoroughly and towel dry. Repeat if needed.

Can I cantilever TimberTech® boards on my deck?

Terrain, Tropical, Legacy can be cantilevered a maximum of 1”. Terrain can only be cantilevered on the ends.

Can I use a router on TimberTech® products?

Routing should only be performed to create a 2” groove above each joist when transitioning from solid boards to grooved on a hidden fastener installation. Full details are available in the Installation and Maintenance Guide.

Can I use glue or caulk with TimberTech?

Do not use caulk to fasten TimberTech® boards or to seal between any of our boards. This will impede the drainage of the board and inhibit the natural expansion and contraction of the boards.

Can TimberTech® be painted or stained?

We do not recommend painting or staining TimberTech® decking. While it is possible to paint our uncapped composite boards, TimberTech® cannot guarantee the performance of paint, stain, or other materials, applied to the product. For further information on painting or staining your TimberTech® decking, refer to our Care and Cleaning Recommendations.

Does TimberTech® decking come in a redwood color?

Yes. You can view all TimberTech® color inspirations on the Find Your Color page.

I have a wood deck and want to do some replanking. Can I replace them with TimberTech® boards?

Yes, you can replace wood boards with composite, though there are a few factors to take into consideration. First, you will want to make sure your substructure is code-compliant and can hold the extra weight of a TimberTech® composite board. Confirm that the thickness of the new TimberTech® board is the same as the wooden board it replaces to ensure your deck remains smooth and flat. You can find the thickness of our products on their individual product pages. So, although replacing old wood deck boards with composite can be done, it will likely result in an undesirable patchwork appearance. A better option, if your substructure is code-compliant, would be to re-plank your entire deck with all composite material.

Is TimberTech® fire resistant?

Fire regulations and codes continue to evolve in the building industry. TimberTech® is committed to manufacturing products that are fully compliant with these requirements, and safe for our customers. All of our TimberTech® products are tested to exceed Flame Spread Index requirements.

What kind of fastener should I use with TimberTech?

CONCEALoc is our most popular fastener for use with our grooved boards for a fastener-free finish. Cortex or TOPLoc are two other fastener options that can be used for just stairs and perimeters, or the entire deck. Cortex provides a discrete hidden-fastening solution, while TOPLoc provides an engineered, color-matched option. Please note that not all fasteners are compatible with all TimberTech® decking boards, and using the incorrect fastening system will void your warranty. For example, CONCEALoc Hidden Fasteners or L-Brackets should not be used for stair installation. Always use the fasteners that are specifically recommended to work with your chosen TimberTech® product.

Does TimberTech® decking really resist fading?

Yes, our capped polymer decking and capped composite decking comes with industry-leading fade and stain warranties. And while any exterior product will fade over time to some degree, all of our lines of decking are technologically engineered to be fade and stain resistant. TimberTech® EDGE decking products are backed by our 25-Year Fade & Stain Warranty, TimberTech® PRO decking products are backed by our 30-Year Fade & Stain Warranty, and, for the ultimate in steadfast color, TimberTech® AZEK decking and porch products are backed by our 50-Year Fade & Stain Warranty. However, our uncapped wood composite boards will gradually weather over time, without compromising the structural integrity, as nature takes its course.

Can I power-wash TimberTech® Deck?

Yes, when the pressure is set to psi or lower, and when using a fan tip nozzle. Always keep the nozzle at a reasonable distance from the surface to prevent damage. To be safe, first try the power washer on a scrap piece or inconspicuous area of TimberTech® Deck to be sure that you will not damage the surface. In some situations, power washing alone may not provide optimal results.

Can I use adhesive or caulk with TimberTech® decking?

No, adhesive and caulks are not recommended for use with TimberTech® decking. Do not get any PVC glue or similar substance on the surface of a TimberTech® deck, as it may discolor and permanently damage the TimberTech® deck surface. Additionally, do not use caulk to fasten TimberTech® boards or to seal between any of our boards. This will impede the drainage of the board and inhibit the natural expansion and contraction of the boards.

Can I use TimberTech® AZEK Decking on a rooftop application?

When a TimberTech® AZEK deck board is properly and securely attached to framing or sub-structure which is rigid and soundly fastened to building or structure, TimberTech® AZEK deck boards can be used in a rooftop application. However, in areas with unobstructed airflow, like roofs and on grade applications, a minimum of 1 1⁄2” sleeper system is required. The deck boards must be attached to a properly secured understructure and leave a minimum of a 1/8” gap between deck boards. DO NOT ATTACH DECK BOARDS TO A FLOATING SUB-STRUCTURE. Consult the TimberTech® AZEK Deck Installation Guidelines for recommended fastening. As always, be sure to consult your local building code official(s) for railing requirements on any deck application. To get deck and railing ideas, be sure to check out our Deck Designer.

What is the best way to clean TimberTech® Deck?

It’s best to clean small, manageable areas to prevent the cleaner from drying on the deck or porch surface. All cleaning products should be rinsed off thoroughly. Always read the cleaning product manufacturer's specific information before using any product on your TimberTech® deck and follow their instructions. It’s also a good idea to test the cleaner on a scrap piece or inconspicuous area of the deck to make sure it doesn’t harm the surface.

What is the minimum height from the ground that TimberTech® Decking must be installed?

When TimberTech® Decking is properly fastened to structurally sound and secure framing, there is no minimum height or ground clearance requirement. Be sure to follow all recommended guidelines for installing TimberTech® Decking.

Will a TimberTech® deck weather?

Any exterior product will fade over time to some degree – that’s the nature of nature. For the ultimate in steadfast color, our TimberTech® AZEK boards are technologically engineered to show minimal fading, backed by a 50-year Fade & Stain Warranty. However, our uncapped wood composite boards will gradually weather, like wood, over time.

Can I build my TimberTech® deck directly over an existing surface?

While TimberTech® products are great for deck replanking (removing old deck surface boards and installing TimberTech® on code-compliant substructure), TimberTech® boards CANNOT be installed on top of existing deck boards.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.

Can TimberTech® decking material be used for a wheelchair/walker ramp?

Yes, TimberTech® decking and railing can be utilized to surface a ramp. We recommend consulting with a local contractor and check local building codes for requirements and best practices. It’s also good to use a decking material that is slip-resistant.

Is there a problem with heat build-up on composite?

Composite decking products, as with most outdoor building products, can retain heat especially after a long day in direct sunlight. At TimberTech, we have engineered certain formulations of our composite decking products to minimize heat build-up, so they’re cooler underfoot. If you're building a deck that will be in direct sunlight, we suggest that you consider decking options that are lighter in color, as they reflect more light, and therefore retain less heat than darker Colors.

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Do I need to place something under grills, chairs, and pots to protect my TimberTech® decking?

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We recommend using protective plastic, rubber, or felt leg pads on furniture and other items to help protect the surface of your deck. Our products have a high scratch-resistance rating, but these easy extra steps can provide additional protection. For grill mats, a natural fiber mat that does not hold moisture will provide the best protection.

What preservatives are in TimberTech® decks' composite core to avoid rotting?

TimberTech® composite decking is comprised mainly of high-density polyethylene and wood particles, but we also add proprietary ingredients to our formulation that offer increased protection from rot.

Which product is better for a heavily wooded lot?

Any TimberTech® product can handle a heavily wooded lot.

Can I use an Aluminium baluster with TimberTech® Rail?

Most of the TimberTech® Rail profiles can be installed with TimberTech® round or square Aluminium balusters using a Custom Rail Pack. The TimberTech® Rail system has only been tested with our Aluminium balusters; therefore, we do not warranty the use of other manufacturer’s components with TimberTech® Rail.

How do I clean TimberTech® Rail?

TimberTech® Rail can be cleaned using a soft white cloth with warm water and a mild soap, followed by a thorough rinse. Chomp Gutter cleaner also works great on TimberTech® Rail. DO NOT USE Solvent based cleaners such as Goof Off, Graffiti Remover, Nail Polish Remover, or similar products on TimberTech® Rail.

What size Secure Mount Posts do I need?

The Secure Mount Post is adjustable and accommodates 36’’ and 42’’ railing. We also offer a 6’’ Secure Mount Post Adaptor to make the Secure Mount Post compatible with our 6’’ Post Sleeve.

How close to the rails can you safely have a barbecue grill without damaging TimberTech® railing?

The distance from our railing can vary depending on the type of grill and size. Most grill manufacturers will have recommendations for placement in proximity to vinyl siding, and you can follow those same recommendations for TimberTech® railing. To protect your deck, a grill mat can be placed under the grill to avoid grease spills. You will want to make sure that the grill mat is safe for your composite decking.

What glass railing options are available with the TimberTech® decking?

We do offer a Glass Channel kit that allows for the installation of glass infill with TimberTech® railing, including Premier Rail, Trademark Rail, RadianceRail, Contemporary Rail, and Builder Rail. The Glass Channel kits are offered in White and Black and in 6' lengths, and the glass is sold separately. Always check your local building codes before starting any project.

What is the benefit of using the rail bracket?

The benefit of using our color-matched, powder-coated rail bracket is simply ease of installation. Using the bracket provides an alternative to toe-screwing the rail between the posts, eliminating the need to pre-drill. Rail brackets also give increased structural stability.

How do you install TimberTech® railing on concrete?

TimberTech® Secure Mount Post is a great option for the installation of TimberTech® railing on a concrete surface and is adjustable to accommodate both 36” and 42” high rail installations. The Secure Mount Post can be installed directly on composite decks or concrete surfaces, and no treated 4x4 post is needed! Mounting hardware for deck installation is sold separately. Mounting hardware for concrete applications can be sourced locally.

Can TimberTech® railing and decking products be curved or bent?

TimberTech® railing and decking products can be curved or bent using heat and force to create custom shapes. Because curving/bending is performed by customers on their own or by third-party fabricators, TimberTech® cannot guarantee the integrity or performance of such applications, including the potential effect to the products’ structural rigidity, aesthetics or other product attributes. Any problems to the decking or railing products resulting from curving/bending are expressly excluded under TimberTech’s Limited Warranty. TimberTech® recommends that all designs be reviewed by a licensed architect, engineer or local building official before installation

Can you paint TimberTech® Rail?

We do not recommend painting TimberTech® Rail. Since TimberTech® Rail is a capped composite with PVC performance materials that will never rot, peel, or splinter, there is never a need to paint them. Fortunately, TimberTech® Rail comes in a variety of Colors and infills for a truly customizable rail system—eliminating the need for paint altogether.

What comes in the TimberTech® Rail kit?

A TimberTech® Rail kit contains the hand rail, base rail, two support rails, balusters, and hardware to attach the railing section to the posts. Rail kits do not include posts, just the railing parts between the posts. TimberTech® Rail kits are only available in white in Premier, RadianceRail and Trademark profiles and are available in 6’ and 8’ sections.

What comes in the TimberTech® Rail Pack?

RadianceRail, RadianceRail Express Rail Pack contains the hand rail, base rail, two support rails, and hardware to build a rail section. Infill options are sold separately to allow for more custom styling. Impression Rail is only sold in Rail Kits, which includes balusters.

What is included in a TimberTech® Glass Channel kit?

The TimberTech® Glass Channel kits include a top and bottom Aluminium channel, rubber gaskets, and fasteners required to attach the channels to our composite railing. The TimberTech® Glass Channel kits do not contain the glass panels.

What is the exact length of the TimberTech® Rail kit?

6’ rails are 72” in length from the manufacturer, but both ends must be cut down a minimum of 1” to achieve proper baluster spacing between the last baluster and the post to comply with local code requirements. 8’ rails are 96” in length. 10’ rails are 120” in length.

We are installing RadianceRail Express on a curved deck. Will the brackets swivel like regular RadianceRail?

While RadianceRail Express Brackets are fixed and do not swivel, they do accommodate angles up to 45 degrees.

What kind of steel is in the rail?

The expanded steel in the rail is galvanized.

What sizes come in the RadianceRail Packs?

RadianceRail Packs are available in 6′, 8′ and 10′ sections, measured from center of post to center of post. The additional material is provided to allow for angles and end cuts/trimming.

How do I clean TimberTech® Rail?

TimberTech® Rail can be cleaned using a soft white cloth with warm water and mild soap, followed by a thorough rinse. Chomp Gutter cleaner also works great on TimberTech® Rail. DO NOT USE Solvent-based cleaners such as Goof Off, Graffiti Remover, Nail Polish Remover, or similar products on TimberTech® Rail.

What is the best way to clean TimberTech® Deck?

The preferred way to keep your TimberTech® deck clean is to use TimberTech® DeckCleaner™ – a formulated, field-tested, and approved product for cleaning TimberTech® AZEK® Deck or Porch, TimberTech® PRO™ Deck, TimberTech® EDGE™ Deck, and TimberTech® Composite Rail. You can also use soap and water or an all-purpose cleaner such as Chomp® gutter cleaner, Zep 505®, Simple Green®, or Krud Kutter®. For TimberTech® AZEK decking, use a stiff, natural fiber brush to clean the boards; for TimberTech® Pro and Edge decking, use a medium-to-stiff nylon brush.

How close to the rails can you safely have a barbecue grill without damaging TimberTech® Railing?

The distance from our railing can vary depending on the type of grill and size. Most grill manufacturers will have recommendations for placement in proximity to vinyl siding, and you can follow those same recommendations for TimberTech® Railing. To protect your deck, a grill mat can be placed under the grill to avoid grease spills. You will want to make sure that the grill mat is safe for your composite decking.

Can I powerwash TimberTech® Deck?

While powerwashing a TimberTech® deck is not the preferred way to clean, you can powerwash it on a “rinse-only” setting when the pressure is set to psi or lower, and when using a fan tip nozzle. Always keep the nozzle at a reasonable distance from the surface to prevent damage. To be safe, first try the power washer on a scrap piece or inconspicuous area of TimberTech® Deck to be sure that you will not damage the surface. In some situations, power washing alone may not provide optimal results. Refer to the TimberTech® Installation & Maintenance Guides.

Can I use rock salt or ice melt on a TimberTech® deck?

As with any walking surface, TimberTech® decking products may become slippery in winter weather. Use 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. For more information, visit Care and Cleaning.

Can you power-wash a TimberTech® deck?

Yes, you can power-wash a TimberTech® deck. First, remember to spray in the direction of the brush/grain pattern to avoid damaging the product. Always take the proper safety precautions when operating a power washer. Be sure to hold the power wash wand at approximately a 30º angle. A fan tip must be used on the wand or damage to the decking will occur. For TimberTech® wood-plastic composite and capped-composite decking, the recommended maximum pressure is psi. For more information, check out Care and Cleaning.

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