Manufactured in roll form, Mammoth can be installed as both a single or double layer system (for ceilings and underfloor only). Mammoth blankets are designed in widths to fit snugly between joists or trusses in a single layer option or alternatively with a second layer run perpendicular to the first, covering the top of the joists or truss bottom chord, reducing thermal bridging in these areas.

Mammoth sections are produced in New Zealand's only airlay polyester insulation plant. This produces self-supporting thermal insulation sections that can be installed in walls and underfloor without mechanical fixings, and has a smooth crease-free surface to improve thermal performance.