Plasterboard backed with rigid insulation is fitted to the inside of your walls. The insulation is usually made from one of several forms of foamed plastic. It should normally be at least 60mm thick, and can be up to 100mmm.

Is insulating plaster any good?

While you could theoretically use insulated plasterboard on internal walls, it is more cost-effective to insulate the spaces between internal walls by using fibreglass or foam. Insulated plasterboard can also be used for ceilings, preventing heat from escaping through your ceiling or roof.

Is there an insulating plaster?

Roundtower Insulating Plaster is a lightweight plaster which offers low strength, high flexibility, high vapour permeability and advanced thermal performance, for use on solid walled masonry. Insulating Plaster has been specifically designed to reduce heat loss in solid walls and older buildings.