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What Is a Beam-and-Block Floor?
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Understand how precast beams and infill blocks create a suspended ground floor, why the system is used and which site details matter.
Planning your overall budget? Estimate the build cost of this design.
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What is a beam-and-block floor? This guide explains how precast concrete beams span between supporting walls while lightweight or dense blocks fill the gaps, creating a stable suspended deck above a ventilated subfloor void. It covers the main components, why the system suits variable ground conditions, and risks including damaged beams and blocked ventilation.
For the wider ground and moisture requirements, see Approved Document C on GOV.UK, or compare it with our guide to a ground-bearing slab floor.
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