Double roofing roof structure

摘要

A double roofing structure in which a water-proof drain plate is set on a backing. The rafter is fixed on the backing through the drain plate with a fixing member. Roof material or roof material holding member and inner layer material are placed and fixed on the rafter. A spacing layer communicating with an opening of the eaves is formed between the drain plate on the backing and the roof plate. The part communicating with the fixing member in the drain plate is formed with a projection.