The roof will be an extensive green roof with a substrate thickness of approx 100mm. the walls will be framed from 50mm x 50mm (2" x 2") uprights with a 48mm x 100mm (2" x 4") top sill and cladding to the sides.. Guide to diy green roofs green roofs provide many benefits when installed correctly - including water storage, � it is not recommended that you build a green roof on a slope of over 10
