Technical specifications
Existing pitched roof, ceiling at rafter line
Target U-value: 0.18W/m²k
150mm of WALLTITE
WALLTITE is applied between the rafters in sloping ceiling areas, either directly onto the underside of slates or tiles, or onto a membrane of low vapour resistivity.
Plasterboard is then fixed to the face of the rafters.
New flat roof
Target U-value: 0.18W/m²k
140mm of WALLTITE
WALLTITE is applied directly to the underside of the plywood decking, between the roof joists. When used in conjunction with spray applied foam, any external weatherproofing must be of low vapour resistivity, e.g. single ply membranes.
External Cavity Wall
Target U-value: 0.30W/m²k
50mm + 35mm of WALLTITE
Injection grade foam can be injected through a series of evenly spaced holes, normally drilled in the outer leaf. This closed cell foam is totally resistant to driving rain. In a residential property, the cavity is usually continuous from the ground floor to the apex of the roof. In this case the whole elevation must be filled. For a nominal 50mm cavity you would need to top this up with 35mm sprayed to the inner leaf.
Party wall
Target U-value: 0.30W/m²k
95mm of WALLTITE
For solid wall insulation, WALLTITE is sprayed between metal or timber studs.
Plasterboard is then fixed to the face of the studwork.
Knee or side wall
Target U-value 0.30W/m²k
95mm of WALLTITE
WALLTITE is sprayed between the timber studs of the wall. Plasterboard or ply is used as a backing board. Plasterboard is fixed to the face of the studwork, on the warm side of the wall.
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