Details: item description/ heading providing and laying four courses water proofing treatment with bitumen felt over roofs consisting of first and third courses of blown bitumen 85/25 or 90/15 conforming to is : 702 applied hot @ 1.45 kg per square metre of area for each course, second course of roofing felt type 3 grade-i (hessian based self finished bitumen felt) and fourth and final course of stone grit 6 mm and down size or pea sized gravel spread at 6 cubic decimeter per square metre, including preparation of surface but excluding grading complete with : bitumen felt (hessian base) type 3 grade i conforming to is : 1322 removal of damage old tarfelt grading roof for water proofing treatment with cement concrete 1:2:4 (1 cement : 2 coarse sand : 4 graded stone aggregate 20mm nominal size) grading roof for water proofing treatment with cement mortar 1:3 (1 cement : 3 coarse sand) 15 mm cement plaster on rough side of single or half brick wall of mix: 1:4 (1 cement: 4 coarse sand) applying o
Sector: Mining