Huntsman Building Solutions, a provider of high-performance, sustainable building envelope solutions, has introduced D-Max Wall™, a new assembly and continuous insulation solution which allows spray polyurethane foam insulation to be installed from the interior while managing thermal bridging of the studs and structure. The assembly utilizes HEATLOK HFO, with the closed cell spray foam insulation providing three key functions, acting as insulation, air barrier, and vapor barrier in a single product application. The new wall assembly eliminates construction delays caused by inclement weather conditions, allowing contractors to continue installation during cold winter months.
In the D-Max Wall, the closed cell spray foam is installed completely from the interior and cuts the thermal bridge of the studs by filling the gap between the exterior sheathing panel, or exterior gypsum, and the studs. Variable depending on the insulation values to be achieved, this gap is created with Z-bars installed directly on the exterior face of the studs before sheathing installation. The spacing and size of the Z-bars vary depending on the type of building and cladding.
Exterior compartmentalization is avoided in the D-Max Wall assembly. Interior fuming is optional as compared to conventional construction and electrical systems may be installed before or after insulation. The assembly also eliminates holes in the vapor barrier.