PROVISION OF ROOF TREATMENT (WATER PROOFING) FOR STORAGE BAYS (3 NOS) OF STORAGE BUILDING AT NAGARJUNASAGAR

Surface Preparation : Preparing the surface thoroughly by cleaning, washing and removing dust, dirt, oil, grease and lose particles. Existing roof systems will be visually inspected for conditions that may adversely affect the adhesion of performance of newly installed products. Damaged or hollow portions, sharp edges, etc. will be cut and repaired with a polymer-modified mortar using Dr. Fixit Pedigree URP. Check if roof slope of a minimum of 1 in 100 is already provided.

All surface crack cutting the cracks up to 5 mm width will be filled up with BOSTIC PU SEALENT. In existing old terraces with brickbat cobra or screeds, the substrate must be checked for its soundness, damaged or hollow portions, sharp edges, any weak surface layer etc. will be removed up to slab level. Just before laying the Polymer modified mortar screed, reinstate the surface with bond coat slurry mix with FOSROC NITOBAND SBR LATEX in the ratio of 1:1 (1 part SBR: 1-part Cement). Level the surface with Polymer modified mortar mixing with FOSROC NITOBOND SBR LATEX 10 to 15% by weight of cement in the CM ratio of 1:3

Coating Application All joints/corners/drainage outlets and penetration points will be treated prior to all application of Dr. Fixit Roof Seal Top Coat. All corners, gaps, joints, protrusions and outlets will be coated with an extra coat incorporating reinforcing fabric mesh. Dr. Fixit Roof Seal Top Coat may be applied by roller or brush. Application of a coat of Dr. Fixit Roof Seal Top Coat (diluted with water in the ratio 2:1) as Self Priming - 9 - 10 Sq.mtr / liter. Allow coating to dry for 3-4 hours prior to applying first coat & second coat. Applying two coats of Dr. Fixit Roof Seal Top Coat @ 2 - 2.2 Sq.mtr / liter/coat, without water dilution, the rate of the application being the same for both the coats.