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Cavity Walls Explained
£1.99
Planning a modern masonry build? This guide explains cavity walls, insulation choices, wall ties, moisture management and the details that determine performance.
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Cavity walls have been the standard for UK external walls for decades, but insulation types, wall ties, and cavity widths have all changed significantly under current regulations. This guide explains how a modern cavity wall is built up, the role of the cavity in managing moisture, and how insulation choice affects the U-value and overall thermal performance of the wall.
For the wider construction method, see our Masonry Construction Explained guide. The government’s Approved Document C provides technical guidance on moisture resistance in walls.
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