WALLTITE® is applied directly to the ‘over rafter’ laminated insulation board, between timber rafters in tiled or slated pitched roofs.
This composite system of insulation provides all the benefits of reduced U-values, controlled air leakage and air infiltration and reduces thermal bridging to a minimum.
WALLTITE® has undergone various performance tests. Certificates are available on request.
Habitable space: plasterboard and skim/VCL with taped joints VCL to be carefully cut and sealed around struts, ceiling joists and penetrations); batten/counter batten rafters as necessary to achieve insulation depth, confirm rafter strength sufficient to receive counter battening and boarding if required.
Loft space only, non habitable: insulated between and over rafters to achieve target U-value. WALLTITE® may remain exposed.
|Specification||Spray applied polyurethane foam between rafters, directly onto board insulation|
|NBS clause||P10 15A|
|Air leakage (50mm)||0.0033m3hrm2|
|Lambda 90/90||0.025 - 0.028W/mK|
|Fire rating||Class 1 to BS 476: Part 7|
|Water vapour diffusion resistance factor||61.12|
|Thickness of WALLTITE (mm)||Thichness of board (mm)||U-value (W/m2k)|