Atlantic Builders Supply Adds High-Performance FlexxBoard25 Insulation

Manufactured from 2.0-pcf-density foam, the material delivers an R-value of 4.54 per inch. Its textured surface is engineered to integrate with freshly placed concrete, a design choice intended to mitigate shifting, frost heaving, and cracking in residential and commercial projects ranging from under-slab insulation to foundation perimeters.

The product enters the market backed by data from the EPS Industry Alliance. Research comparing the two materials after 15 years of below-grade service found that XPS samples retained only 52% of their original thermal resistance due to moisture absorption, while EPS samples maintained 94% of their R-value. This disparity is attributed to the higher vapor permeance of EPS, which allows trapped moisture to escape rather than degrading the material's insulating properties.

Atlantic Builders Supply Northeast is positioning the product as a cost-effective alternative for the regional market, offering pricing that typically undercuts big-box retailers by 15% to 20%. Based in Greenland, New Hampshire, the distributor provides localized delivery across New England, with additional tax advantages for contractors picking up orders directly from their Greenland Road facility.