Tarmac Lightweight Screed is a pre-blended, dry bagged lightweight screed for weight reduction and thermal insulation on floors and roofs. When used on roofs it can be laid to falls and is generally topped with sheathing felt and mastic asphalt.
When used for flooring, the mix does not provide a wearing surface and must therefore be topped. The recommended specification for floors is a monolithic topping of 15mm minimum, 1:4 ready-mixed sand and cement screed.
Tarmac Lightweight Screed is composed of Perlite Lightweight Aggregate, ordinary Portland cement, fine limestone, specially selected air entraining and foam stabilising agents. It is manufactured under controlled conditions to ensure consistent quality.