Designed to overcome thermal and vapour transmission to loft voids after the fitting of downlights, Lofcap from Aico provides a solution that has been tested to BS 476 Part 21. The product offers a solution to the coverage of thermal insulation in loft spaces mentioned in Document L and minimises heat loss. Weighing 350g, it adds no load on the ceiling but is rigid enough to allow insulation to be laid over it.