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What Is a Sedum Roof?
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Understand how a sedum roof manages rainwater, which layers protect the building and why saturated weight, drainage and maintenance all matter.
Planning your overall budget? Estimate the build cost of this design.
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What is a sedum roof? This guide explains how a lightweight planted roof manages rainwater and protects the waterproofing below. It covers the vegetation, growing medium, filter and drainage layers, plus the root-resistant membrane beneath them. It also highlights saturated weight, maintenance and drainage requirements that designers must address.
For the wider drainage context, see the National Standards for Sustainable Drainage Systems on GOV.UK, or compare the construction with our guide to warm roofs.
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