Details: m&l for water proofing treatment to rcc roof slab, including parapet comprising with the following courses of treatment/specification from bottom to top:-(i) taking out old roof treatment and roughening the same old concrete slab by picking, sweeping clean and washing down with water to remove dust etc.(ii) screed bed or bedding layer of mortar 15 mm thick in cm 1:4 for laying as in roof slab with mixing of wpc and surface finished fare and smooth without using extra cement. (note: wpc shall be measured and paid for under separate items)(iii) cleaning of plastered roof surface and applying one coat of cold bituminous primer @ 0.25ltr /sqm conforming to is:3384-1986.(iv) app based polymeric membrane 3mm thick (minimum), weighing 3.5 kg/sqm reinforced with polyester non woven fabric (weighing not less than 150 gms/sqm) shall be less applied over bituminous primer as specified above over a application of polymeric membrance shall by torch application. the overlaps shall be minimum 100mm
Sector: Defense