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AZEK Deck Installation
Because of its built in advantages, AZEK Deck is easier to install than other decking options.
Install AZEK Deck using the same good building principals used for wood or composite decking and in accordance with local building codes.
The installation guidelines below assume installation above wood joists. If you wish to install AZEK Deck Boards over an existing concrete floor AZEK advises first installing pressure treated wood "sleepers" (installed flat on the concrete surface). Since AZEK is impervious to moisture, degradation of the Deck Boards is not the issue, but rather the potential for mold growth if Deck Boards are installed directly against the concrete.
If using AZEK Deck materials on an existing joist structure, ensure all joists are level, structurally sound, void of protruding nails or screws, and properly spaced, as diagramed below. Because AZEK Deck is a lifetime product, substructure framing and posts should be of treated material suitable for ground contact. AZEK Deck products should not be used for railing supports. Deck Railing and Deck Newels are available.
AZEK Decking can be installed using the same tools you would use to install wood or composite decking.
• Self-feeding screw guns can be used
• Circular saw with fine-toothed, carbide-tipped finish trim blade or a 20-grit diamond-tipped
blade work well for cutting.
• As with wood or composite decking, safety glasses should be worn during the entire installation
AZEK Deck materials can be installed using the same fasteners you would use to install wood or composite decking. Due to the long-lasting durability of AZEK Deck products, a high quality fastener is recommended that meets the following specifications:
• Stainless Steel
• Minimum Screw Size: #7
• Minimum Length: 2 1/4”
EXPANSION and CONTRACTION
Unlike wood, where size will fluctuate with moisture changes, AZEK Deck boards are not affected by moisture absorbtion. Also, AZEK will have minimal expansion and contraction due to changes in temperature. Fastening your deck boards according to these Installation Guidelines minimizes expansion and contraction. Also see more specific instructions for installation with screws.
• Expansion and contraction are most significant where extreme temperature change may exist.
• Best practice is fasten the deck boards as soon after cutting as possible.
• When ambient temperature is above 80°F, fit deck boards tightly at the ends.
• When ambient temperature is 32°F or below, allow a 1/16” approx. end gap.
• Deck boards fastened securely using 2 fasteners per joist member will have
minimal expansion and contraction.
Some area building codes require double joists when joining boards end to end. Always check with your local code authority for specific requirements before installation.
Approximate expansion and contraction in length of
unattached deck boards during 50°F temperature change:
STAIR CODE COMPLIANCE
To meet the AC174 Requirement for stair loading follow these instructions:
Although not shown in the above drawings, steps can be enclosed by the use of AZEK Deck Fascia Boards as risers under treads. Enclosed steps provide a more finished look. Treads should overhang the stair support stringers by an amount sufficient to provide a final overhang of tread beyond face of riser.
ADDITIONAL INSTALLATION INFO
Also see Step-by-step AZEK Deck Installation with Screws for additional details.
Painting is not recommended.
CARE & MAINTENANCE
Also see Care & Maintenance for important considerations.
YOUR NEXT STEP
If you haven't already done so, order a Sample Kit and take the AZEK Double Dare Challenge! Prove for yourself that AZEK Decking is your best solution now and for the future!
AZEK Building Products and Vintage Woodworks cannot be liable nor responsible for the improper installation of AZEK Deck. Since all installations are unique, it is the sole responsibility of the installer to determine specific requirements in regards to each decking application. Best practice is to have all deck designs reviewed by a licensed architect, engineer or local building official before installation.
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