ENVIREFLEX® 3-IN-1 INSULATION SYSTEM
DESCRIPTION
The new Envireflex® floor/roof insulation offers non-irritant acoustic/thermal insulation and
fire protection material for application to new and existing floors and flat roofs and between
rafters in loft conversions. The system allows free air movement, is moisture-resistant, and
meets the requirements of Document C of UK Building Regulations for condensation. It is
made to order, as dimensions between rafters and joists can vary. When using only 9mm
thick plasterboard, it can give in excess of one hour fire protection and sound studio levels of
acoustic protection. When used to insulate floors in loft areas, the ceiling below does not
require a fire-rated upgrade, meeting the requirements of Document B of UK Building
Regulations. See data sheet for full details of options and fitting instructions.
USE
The components are fitted between the rafters or joists, resulting in minimal cutting on site
and fast installation. Overlap joints are adhered with Envirograf® Product 46 (intumescent
adhesive) and are fastened in place with a staple gun.
PERFORMANCE
Achieves ‘U’ values of 0.35W/m²K in pitched roofs and 0.30W/m²K in floors and flat roofs
when thermally tested at BDA Keur in the Netherlands. Fire tested to BS476 Part 21 (1987),
achieving 70 minutes of fire resistance. Tested for airborne and impact sound at Building Test
Centre, meeting the requirements of Document E of UK Building Regulations.
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