Skip to content

Choose country and language preference

Masonry Internal Wall Insulation Details

The details within this section have been developed for internally insulated cavity wall constructions.

For this form of construction, details are given for the junctions with a range of roof, ground floor and internal floor types, in addition to details around window openings etc.

Insulation thickness for main building elements have not been provided as these depend on the thermal properties of the materials chosen, together with the proposed U-value.

Due to the practicality of fixing insulated dry lining to blockwork these details limit the overall board-insulation thickness to 75mm.

All details are shown with a brick outer leaf for simplification. However, other types of masonry materials may be used as a substitution, such as blockwork with render, tile hanging or weather boarding, without any loss of thermal performance or increased technical risk.