12/08/2026
"Building terms for babies" πΆπ§±
Today's lesson: the Cavity Wall.
In grown-up terms: most homes built after the 1920s have two layers of wall with a gap in between. That gap helps keep damp out and can be filled with insulation to make your home more energy efficient β often one of the cheapest ways to cut heating bills.
Not sure if your walls are cavity or solid? We can tell you in 5 minutes on site. π©