Installing the cavity wall insulation 

For new builds, the cavity wall insulation should be installed correctly according to the wall construction. Installation guides are available for cavity wall insulation:

Masonry cavity walls with partial fill insulation

Masonry cavity walls with full fill insulation

Insulating timber frame cavity walls

Insulating steel stud frame cavity walls

Installing internal dry lining insulation

1. Prepare the wall surface to ensure it is free from all obstructions. Remove skirting boards, picture rails and window boards, as well as any wall coverings with high vapour resistance, such as vinyl wallpaper or gloss paint.

2. Fit Mannok Therm Laminate-Kraft / MLK insulation boards against the inner leaf of masonry and hold in place using wall-tie clips or collars. Boards must be butted tightly together at corners to give a continuous layer of insulation and avoid thermal bridging issues. The insulation boards should be cut neatly to fit tight to the backs of frames, sills, cavity closers and lintels.

3. To minimise air infiltration, a continuous strip of dry-lining adhesive should be used to seal the perimeter of the Mannok Therm Laminate-Kraft / MLK boards, including around window and door openings.

4. For heavy fixtures such as wall cupboards or radiators, install timber fixing battens within the layer of insulation to carry them. Otherwise, the fixtures should be fixed directly to the masonry structure using appropriate mechanical fixings.

5. Fix Mannok Therm Laminate-Kraft / MLK insulated plasterboard to the wall with adhesive dabs and secure with 2 secondary mechanical fixings at mid height and at a minimum of 15mm from the board edge. The screws which fix Mannok Therm Laminate-Kraft / MLK to the battens should be selected to minimise heat loss: U-value calculations for the wall should account for the additional heat loss resulting from mechanical fasteners.