Envirolay Fireproof Roofers Underlay

Envirolay HR Premier Dedicated Fireproof Roofers Underlay

Envirolay insulated fireproof roofers underlay is the next generation of tough, high performance pitched roofing underlay. It is a type HR underlay and roof space ventilation is required at both high and low level.

Envirolay is BRE and Exova certified and is suitable for both warm and cold roof, supported and unsupported, ventilated roof constructions throughout the UK.

The flame retardant woven glass fibre cloth and aluminium foil weave has a high nail tear resistance which makes it untearable in normal use.

The thermal reflectivity of the material is designed to reduce the convection and radiant heat loss through the roof.

In the summer months it reduces heat entering into the building, but also helps to maintain the heat in the building during the winter.

  • Premier HR fireproof protection underlay
  • Exova fire tested
  • BS:ENISO 11925-2:2010
  • DD CEN/TS 1187 :2012 Test 4
  • Conforms to BS:5534-2014
  • BRE tested
  • For use in all zonal areas 1-5
  • Use with or without Duo Plus Tape
  • Suitable for most types of roofing structures, i.e. cold roof, warm roof & solid roof

Envirolay Roofing Underlay

Each roll: 1m x 30m
Roof area coverage: 30m²
Weight: 15kg



*  Please allow for a minimum overlap of 150mm for each layer course
*  A sag of between 3-5mm is required between rafter centres

N.B.  For compliance to UK & European Fire Standards and to conform to our guarantee Envirolay is recommended for use for all roof installations/applications 

Envirolay Roofing Underlay

Envirolay Underlay.pdf

Envirolay Roofing Underlay

Envirolay: GSP06

Envirolay Roofing Underlay

Available for use with this product:
GSPDST: Duo Plus Tape 40mm x 50m

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