TechnoNICOL W400 Glass Fibre Green Shed Felt 10m x 1m

W400 mineral membranes are economical, glass fibre based waterproofing materials designed for use in traditional pour and roll multi-layer systems or as single layer on shed roofs.

W400 is a glass fibre based, slate covered Cap sheet, saturated and coated with oxidised bitumen. The membrane carrier is a glass reinforcement, giving the material good dimensional stability. The upper layer is coated with slate protecting material from ultraviolet exposure and lower layer is finished with fine grained sand.

W400 materials are generally used to cover sheds, garages and other garden building with overlaps fixed by nailing or glued over with mastic. When applied by traditional W400 should be installed in accordance with BS 8217: 2005 Code of Practice for Reinforced bitumen membranes for roofing, constantly observing TechnoNICOL installation recommendations and guidance. W400 membranes are applied on to previously installed base layer/underlay, clear of any debris or sharp projections.

Hot bitumen should be poured and spread in front of the roll ensuring a continuous coating for the full width. The Side and end laps must be maintained at minimum of 80 mm. The cap sheet should be offset 300 mm from the underlay to avoid side build up.