Description Sedum blanket roof systems are a perfect way to liven up that 'boring' grey extension roof, bring to life your tired shed or add that 'eco' touch to your new building project. Our sedum blanket systems provide you with everything you need to obtain a sustainable and healthy sedum blanket roof. Our packs include:     Protection fleece (2mm), to provide that added protection to your waterproofing membrane     Rigid moisture retention and drainage board (20mm) with bonded filter fleece. This regulates the moisture content within the substrate layer.     Sedum specific substrate (50mm). This provides a root zone for long and sustainable plant growth     Sedum blanket (30mm) with 8-12 species specifically chosen for green roof application. A saturated sedum blanket green roof system weighs 100kg/sqm and the approximate height is 110mm.