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D-Max Wall Assembly - A Proven Concept
The D-Max Wall System simplifies construction by allowing spray foam insulation to be applied from the interior, eliminating weather and facade access constraints. Using Heatlok HFO Pro or Heatlok HFO High Lift, it delivers insulation, air barrier, and vapor barrier in a single application—ensuring high thermal resistance and airtightness with thinner walls. This faster, safer assembly reduces costs, streamlines coordination, and accelerates project delivery.
Time Saving with Lower Overall Construction Costs
The spray foam application is installed completely from the interior and will cut the thermal bridge of the studs by filling the gap between the exterior sheathing panel (exterior gypsum) and the studs. This gap is variable depending on the insulation values to be achieved and is created with a Z-bar. Z-bars are installed directly on the exterior face of the studs before the sheathing is installed. The spacing and size of the Z-bars vary depending on the type of building and cladding. A reference chart has been validated by an engineering firm as well as the NFPA 285 compliance .
1.5 to 3 in.
1 to 4 in
VARIABLE
Significant Benefits
• Fast installation with fewer workers, cutting costs • 1 product, 3 functions: insulation, air & vapor barrier in one step • Applied fully from the interior—no weather delays, scaffolding, or heavy equipment • Significant winter heating savings and reduced rental/logistics risks • Install as walls go up; electrical can be done before or after insulation • Works in cold weather (down to 15°F) • Superior acoustical performance, tested on site • Meets IBC fireblocking requirements for concealed wall spaces. IBC Section 718.2.
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