20mm Roof Drainage System - Sedum Supply
2021-7-23 · Our 20mm green roof drainage layer is ideal for use with our sedum matting. It retains 5.5ltrs per m2, allows for slow release drainage, filteration and protects the membrane. SS roofdrain's perforated HDPE core allows both water attenuation and drainage. Buy online £11.76 per m2. Quick delivery. Green roof …
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