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What Is a Ground-Bearing Slab Floor?
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Understand the layers within a ground-bearing slab floor, how they control moisture and heat loss, and why ground preparation and membrane continuity matter.
Planning your overall budget? Estimate the build cost of this design.
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What is a ground-bearing slab floor? This guide explains how compacted hardcore, a damp-proof membrane, insulation and concrete form a solid floor supported directly by the ground. It covers the typical layer sequence, service coordination and the risks created by poor compaction or damaged membranes. It also explains how radon protection may affect the floor build-up.
For the ground-moisture requirements, see Approved Document C on GOV.UK, or explore our guide to radon barriers.
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