ROOFING MATERIAL AND DEVICE FOR ITS FORMATION

摘要

FIELD: construction engineering. SUBSTANCE: roofing material is made up of basic layer which is covered with separating layer and after that bituminous outer layer is applied to it. Basic layer is lying on supporting layer by means of which this roofing material can be attached to bearing structure such as roof framework. Holes are made in separating layer and due to them outer covering layer is strongly fastened with supporting layer. EFFECT: high efficiency.