Open-Joint Cladding Made with Composite Decking
Open-joint cladding has been around for decades, but the look has grown in popularity with architects in recent years, creating the sought-after deep shadow lines ideal for a high-end, contemporary look.
Composite decking has emerged as a go-to material for open-joint cladding systems, and demand is skyrocketing thanks to its combination of looks and low maintenance.
The Benefits of Composite Decking for Open-Joint Cladding
Architects and contractors are turning to composite decking for open-joint cladding systems in large part due to aesthetics: Composites combine a more robust profile akin to tropical hardwoods like ipe and mahogany. And in the case of products like Envision’s Distinction, and Expression collections, authentic graining patterns and rich colors further emulate the sought-after look of exotic wood.
But unlike wood materials that may require staining or oiling, Envision composite decking needs little maintenance beyond the occasional power wash. And while exotics also may be prone to fading over time (ipe, for example, will start to fade when used with a penetrating oil finish), Distinction, Inspiration, and Expression decking boast a capstock that helps avoid staining and fading to retain their color for years to come.
It’s important to note that not all composite products are approved for use as cladding, so be sure to verify with your manufacturer. Distinction, Inspiration, and Expression are all code-approved for cladding applications.
Installation Strategies for Composite Decking in Cladding Projects
Applying composite decking for open-joint cladding requires a few different steps than you may be accustomed to with traditional applications of materials like vinyl and fiber cement. Installers should follow all manufacturer instructions (download Envision’s cladding installation guide here.)
The wall itself shouldn’t need any additional reinforcement or changes to framing and sheathing, though it’s best to verify with your engineer. However, composite decking should not be installed directly to sheathing or the wall surface, but rather as a rainscreen. Fasten Envision cladding boards to furring strips to create a minimum ¾” air gap. This will allow bulk water to drain away and help the cavity dry out.
Specifiers also need to keep in mind that the open joints in the cladding do necessitate attention to the building envelope itself because there is greater exposure to UV rays and weather. To maintain the desired look, a black weather-resistive barrier and flashing tape should be used, but ensure they are rated for UV exposure for use behind open-joint cladding. Installers will want to pay attention to and plan for the placement of housewrap fasteners to ensure they aren’t visible in the siding gaps.
Otherwise, installing Envision cladding is much like building a deck on a wall, using the same composite decking screws. Choose color-matched screws to create a seamless look.
Decking as Siding Offers One SKU, Two Uses
Along with creating a desirable aesthetic for building and design pros, decking as cladding supports dealers by extending the usage possibilities of decking lines without adding additional SKUs and inventory. Composite decking also provides an upgrade option that combines two in-demand elements in one: the look of high-grade stained wood and low maintenance—a key differentiator versus traditional cladding materials without much added commitment.
