Masonry Wall

Masonry cavity walls are still the most common way to build UK homes, and they create a lot of junctions to resolve. This category brings together our masonry wall details, split into full fill and partial fill cavity construction. You’ll find foundation junctions, window heads, cills and jambs, eaves, flat roof parapets and abutments, including wide 150mm cavity details, stone-faced walls and Porotherm clay block walls. Each detail shows the full build-up, so you can see how the junction works before adapting it.

What’s the difference between full fill and partial fill? Full fill insulation occupies the whole cavity. Partial fill leaves a clear residual cavity between the insulation and the outer leaf, which gives extra protection against wind-driven rain. Approved Document C and the UK exposure zone map help you decide which suits your site.

Do you have wide cavity details? Yes, including 150mm cavity walls in both full fill and partial fill.