Partially Bonded Two Layer System
Suitable for new build and refurbishment applications over numerous roof types, a slope in the roof substrate or insulation will be required.
EshaFlex 370 WS Black Mineral reinforced bitumen membrane torch applied to base sheet. EshaFlex 370 WS Black Mineral is BS EN 13948: 2007 compliant for resistance to root penetration and feature patented Esha Groove Technology® which uses up to 25% less gas, reduce CO2 production by up to 168 g/m2 and reduce installation times by up to 30%.
Read more about EshaFlex cap sheets here.
Primer the surface of the insulation with EshaPrimer and then apply EshaVent partially bonded base sheet providing 40% bond area. Release film on underside is removed when installed over a primed surface, thermo adhesive bonding as cap sheet is torched.
ProTherm polyisocyanurate (PIR) insulation to a thickness specified to achieve the U value (See Thermal calculation tab)manufactured from CFC and HCFC free grade of material to ensure zero ozone depletion potential and a global warming potential factor less than 5 and with a BRE Green Guide A rating. Either a uniform thickness as part of a sloping substrate or tapered to create the fall.
A choice of four:
EshaBase 2mm Alu SA; Following an application of Esha SA Primer a self-adhesive aluminum lined reinforced vapour layer applied to lightweight timber, concrete or panel substrates.
EshaBase 4.2mm Alu SA; Following an application of Esha SA Primer a self-adhesive aluminum lined reinforced vapour layer applied to lightweight metal decks, timber, concrete or panel substrates.
EshaBase SA Sand; Following an application of Esha SA Primer a self-adhesive sand faced vapour layer applied to lightweight timber, concrete or panel substrates.
EshaBase Alu; Following an application of Esha Primer a reinforced aluminum lined vapour layer torch applied to a solid substrate.
After the placement of an Esha tilting fillet to the intersection of upstands install EshaFlex 370 Plain followed by Eshaflex 370 WS Black or Grey Mineral, both torch applied