A cavity wall refers to a type of wall construction that consists of two separate walls with a space in between. This space, called the cavity, helps to improve insulation and prevent dampness. Full definition
We've heard of cases where damp has formed after having cavity wall insulation installed, so make sure it's appropriate for your home. (moneysavingexpert.com)
We've heard of certain cases where damp has formed after having cavity wall insulation installed, so make sure it's appropriate for your home. (moneysavingexpert.com)
GROUND FLOOR WALLS Before: Brick - block cavity walls with empty 70 mm cavity. (passivehouseplus.ie)