Frequently Asked Questions

While you can install AZEK products yourself, we highly recommend that you hire a professional contractor. AZEK Pro contractors are trained to install our products, so they know exactly what they’re doing. They’ll ensure that everything is installed properly and abides by the manufacturer’s guidelines. From quick replacements to brand new custom decks, our Pros are ready and able to tackle your next project.

AZEK Classic Trim products do not require paint for protection, but may be painted to achieve a custom color or to cover nail holes that have been filled. AZEK PaintPro Trim mush be painted within 180 days of outdoor UV exposure.

Yes. AZEK Trim products can be used on a variety of interior applications. However, you should check with your local building code before installing AZEK Trim products in an interior application.

No, AZEK Trim products are manufactured in a matte white finish only, but can be painted to achieve a custom color. Please refer to the painting section in our Trim Installation Guidelines.

Depending on degree of cleaning needed, power wash or hose loose dirt off of the trim board. If using a power washer, be sure to test the pressure setting and nozzle first to ensure that the surface of the trim will not be damaged. Other cleaning methods include using a soft cloth and a mixture of mild detergent. Some people have found the Mr. Clean Magic Eraser to work on pencil or other black marks. Other methods include cleaning with TimberTech^® Deck Cleaner™ or OxiClean with a medium nylon bristle brush or using a mild household spray cleaner like Simple Green, Krud Kutter Cleaner/Degreaser or denatured alcohol. When using cleaners other than a mixture of mild detergent and water, it is best to test on a small area or a scrap piece of AZEK Trim, to make sure it does not harm the surface or damage the product’s appearance. Always read the cleaning product manufacturer’s specific information before using any product on your AZEK Trim and follow their instructions. WARNING: Keep children and pets away from cleaning product and the Trim until completely dry. IMPORTANT: Do not use solvent based cleaners as they can harm the finish of AZEK Trim. Consult with your paint manufacturer for instructions on cleaning AZEK Trim that has already been painted.

You will want to use the same fasteners you would use for installing wood trim and siding. They should be stainless steel or hot dipped galvanized and long enough to penetrate the substrate a minimum of 1-1/2”. For best results, use fasteners designed for wood trim and wood siding. These fasteners have a thinner shank, blunt point, and full round head. Standard nail guns work well with AZEK Trim. If using pneumatic tools, use a fastener with a full round head and set the pressure so the fastener goes just beneath the surface of the AZEK board. IMPORTANT: Staples, brads, and wire nails should never be used. These products have shanks that are too small in diameter to control the thermal expansion and contraction properties of AZEK Trim. For a finished look the Cortex fastening system can be used to reduce the need to field apply paint when the trim is going to be left white. Please see the AZEK Trim & Moulding Install Guide for details.

No, AZEK Trim cannot be used in structural applications. WARNING: AZEK Trim products cannot be used in any stress or structural applications. AZEK Trim products can only be used as the decorative part of your application; either wood or metal structural components need to be incorporated for structural applications. Check with your architect or builder if your application is structural.

Acrylic caulk
Polyurethane/urethane caulk
Vinyl spackle

We recommend using the AZEK Fill and Flex product for deeper holes and for small surface heads utilize the AZEK Nail Eraser.

You can use an acrylic, urethane, or polyurethane caulk with AZEK Trim.  For Best results and color match, we recommend using our AZEK Fill and Flex caulk sealant.

If you choose to paint, use 100% acrylic latex paint with an LRV of 55 or higher. Definition of LRV (Light Reflective Value): LRV is the amount of light reflected from a painted surface. Black has a reflectance value of Zero (0) and absorbs all light and heat. White has a reflectance value of nearly 100 and keeps a building light and cool. All colors fit between these two extremes. Light Reflective Values are given as a percentage. For example, a color with a LRV of 55 means it will reflect 55% of the light that falls on it. For darker colors (LRV of 54 of lower) use paints with heat reflective characteristics specifically formulated for use on vinyl/PVC products. These paints/coatings are designed to reduce excessive heat gain. WARNING: It is recommended that should you choose to paint a darker color (LRV of 54 or lower) all aforementioned installation steps should be followed. Please refer to the painting section in our Trim Installation Guidelines.

PaintPro Trim must be painted and also must be painted within 180 days of outdoor UV exposure. For lighter colors with an LRV of 55 or greater: paint must be 100% acrylic latex. For darker colors with an LRV less than 55: paint must be vinyl-safe from a vinyl-safe color palette. For custom colors, use a coating with solar reflective pigments. Definition of LRV (Light Reflective Value): LRV is the amount of light reflected from a painted surface. Black has a reflectance value of Zero (0) and absorbs all light and heat. White has a reflectance value of nearly 100 and keeps a building light and cool. All colors fit between these two extremes. Light Reflective Values are given as a percentage. For example, a color with a LRV of 55 means it will reflect 55% of the light that falls on it. For darker colors (LRV of 54 of lower) use paints with heat reflective characteristics specifically formulated for use on vinyl/PVC products. These paints/coatings are designed to reduce excessive heat gain. WARNING: It is recommended that should you choose to paint a darker color (LRV of 54 or lower) all aforementioned installation steps should be followed. PaintPro is patent pending exclusive technology. Please refer to the painting section in our Trim Installation Guidelines.

The Alpine Collection is made from cellular PVC with an exterior-grade, wood-tone laminate bonded onto our WP4 and Beadboard profiles.

Use AZEK color-matching end cut coating applicator for cut board edges. Fill exposed fastener holes with a wax stick nail hold filler.

To clean AZEK Alpine boards, wipe material with gentle cleanser and a soft cloth. Do not use abrasive scrub pads.

You will want to use the same fasteners you would use for installing wood trim and siding. They should be stainless steel or hot dipped galvanized and long enough to penetrate the substrate a minimum of 1-1/2”. For best results, use fasteners designed for wood trim and wood siding. These fasteners have a thinner shank, blunt point, and full round head. Standard nail guns work well with AZEK Moulding. If using pneumatic tools, use a fastener with a full round head and set the pressure so the fastener goes just beneath the surface of the AZEK board. IMPORTANT: Staples, brads, and wire nails should never be used. These products have shanks that are too small in diameter to control the thermal expansion and contraction properties of AZEK Moulding. Please see the AZEK Trim & Moulding Install Guide for details.

Unlike some exterior moulding on the market, AZEK Moulding resists yellowing over time due to the UV protection throughout the product.

Yes, AZEK Moulding can be heat formed, however, various shaped details or dimensions of the profile may be lost in the process.

Depending on degree of cleaning needed, power wash or hose loose dirt off of the moulding. If using a power washer, be sure to test the pressure setting and nozzle first to ensure that the surface of the moulding will not be damaged. Other cleaning methods include using a soft cloth and a mixture of mild detergent. Some people have found the Mr. Clean Magic Eraser to work on pencil or other black marks. Other methods include cleaning with TimberTech^® Deck Cleaner™ or OxiClean with a medium nylon bristle brush or using a mild household spray cleaner like Simple Green, Krud Kutter Cleaner/Degreaser or denatured alcohol. When using cleaners other than a mixture of mild detergent and water, it is best to test on a small area or a scrap piece of AZEK Moulding, to make sure it does not harm the surface or damage the product’s appearance. Always read the cleaning product manufacturer’s specific information before using any product on your AZEK Moulding and follow their instructions. WARNING: Keep children and pets away from cleaning product and the Trim until completely dry. IMPORTANT: Do not use solvent based cleaners as they can harm the finish of AZEK Moulding. Consult with your paint manufacturer for instructions on cleaning AZEK Moulding that has already been painted.

Shelf life is 12 months when properly stored in an unopened original container in a cool, dark area between 55°F to 75°F.

AZEK Fast Cure and Slow Cure adhesives are solvent-free, acrylic-based adhesives. Whereas solvent-based products leave behind only 20% of their volume and lose the rest through evaporation, 100% of Fast Cure and Slow Cure change through a chemical reaction from a liquid to a tough and durable plastic which can be cut or sanded. More importantly, since they are 100% solids, and have a mayonnaise-like consistency, they can fill gaps up to 1/8" for Fast Cure and 1/4" for Slow Cure. Both adhesives are two-component products consisting of a specially formulated acrylic resin and catalyst system. They are dispensed and combined from Qwik-Mixers at a 1:1 ratio so no manual mixing or blending is required.

Yes, both the Slow Cure and the Fast Cure can be used in cold weather. Fast Cure can be used in temperatures as low as 25°F and Slow Cure as low as 45°F.

Commercial applications are supported by AZEK’s updated code compliance report. CCRR-0266 approves use on commercial, multi-family and residential buildings. More specifically it approves use on exterior wall cladding building Types V-B and all construction types permitted under the IRC and FBC Residential. Additionally, it is approved for use on exterior wall cladding of building Types I-IV and on exterior wall cladding on fire-resistance rated walls.

Hidden clips are not a part of our code compliance research report for TimberTech Cladding. If a hidden fastener is desired the 2.5" Cortex^® can be used, along with the 2.0" Cortex^® for installations over block construction.

Each application is entirely different. The substructure must be built to be weather proof and we are decorative cladding that is not designed to keep moisture out. It is up to the architect, engineer, installer, and local code official to ensure the structure is weather-tight and meets code.

Yes, our code compliance research report requires a minimum 2x4 PT furring strips. Our experience with smaller or thinner furring strips is they split and lose their holding power.

The Vintage^® Collection offers the widest range of sophisticated color palettes and unique board widths in the industry, offering maximum design flexibility with options to fit any home’s style. Defined by natural-looking colors that mimic the look of Ipe, teak, and other tropical hardwoods and a subtle wire-brushed, low-gloss finish, this elegant collection ensures a truly authentic wood look.

Wildland Urban Interfaces (WUI) refers to zones where houses and areas prone to wildfires meet. Local building codes in WUI zones mandate fire-resistant materials for construction projects, including siding. WUI-Compliant materials resist flame spread and catching fire due to flying embers. TimberTech Advanced PVC Vintage and Landmark Collections used as Cladding meet WUI Compliance standards, ensuring your build adheres to regulations and offers an extra layer of protection.

Read the full details regarding all current AZEK warranties. For any questions regarding historical warranties, please call 1-877-275-2935.

You can paint AZEK Trim and Siding black, but only with a specialty paint that is a Water-Based Solar Reflective Coating. These paint have been formulated with solar/heat reflective pigments that specifically prevent heat build.  You will not find a true black color available from vinylsSafe Color palettes and  you should never have custome black colors made or have vinyl safe colors adjusted in a retail store setting as those processes do not monitor how formulation adjustments can affect the LRV rating which may lead to product failure. To Learn more about Water-Based Solar Reflective Coatings from paint manufacture AquaSurTech® or to order direct visit www.aqua-diy.com/azek/

The paint color used on exterior building products is directly exposed to the sun. Light that is absorbed by the paint color converts to heat. When too much heat is absorbed it can alter the actual physical building material in the form of warping, bowing and deformation.  The correct selection of paint color will prevent this.