FIELD: roll roofing operations. SUBSTANCE: invention refers to fitting for attachment of hydraulic insulation layers to ventilation tubes of large diameter, over 300 mm during laying of roll roofing. Given fitting includes protective apron, clamp, transitional collar. Specific feature of invention lies in attachment of hydraulic insulation layers to transitional collar by means of pressing ring put on anchor bolts located in transitional collar. EFFECT: improved quality of fitting, enhanced functional reliability of fitting in process of its usage. 1 dwg
