Tirumala Tirupati Devasthanams Tender

Specialised five layer system of waterproofing treatment to the terrace with following specification: - Providing and laying five layer water proofing cum heat insulation treatment (MIX GUARD HR5) over existing roof slab, all as directed by Engineer-in-charge and as per the following specification: - Arresting roof leakage by providing five layer treatment with MIX GUARD HR5 – five layer system of FAB Chemicals or equivalent elastomeric water proofing and heat reflective coating comprising of the following: A.Surface preparation – Cleaning the whole area with wire brush. Chipping all loose/dead mortar thoroughly. Cleaning the entire area with high pressure water jetting to remove all loose particles/grease/oil/dust/dirt/curing compound etc. Surface cracks must be filled with Mix Build GP and wide cracks must be cut and repaired with Mix build SR polymer modified repair mortar.

B) Application of Mix Guard HR5 – five layer system with brush. 1. First layer – MIX PRIME AC-100 : Apply base prime coat using Mix Prime AC100 compound which is produced by mixing Mix Prime AC-100 with water and cement at the ratio 2:1:3 (Mix prime AC 100 : water : cement) by volume with a slow speed drill with paddle. This compound shall be applied with sufficient thickness to cover the holes/pores/cracks @ 1 lit/Sqm area (0.35 Lt of MIX Prime AC100/Sqm) 2. Second Layer – MIX MAT GFM 70 / 50 : Mix mat GFM70/50 Synthetic fibre reinforced mesh shall be spread on the top of the primer/in mix with Mix prime AC100 in the wet condition and allow to dry for a period of 6 to 8 hours. A minimum overlap of 100 mm to be provided at the joints i.e. at 1.10 Sqm/Sqm. The Mix mat GFM Mesh shall confirm to the technical specification as per the manufacturers data sheet (40 Gram / Sqm as a weight)

3. Third Layer – MIX PRIME AC : Apply one coat of Mix Prime AC water based acrylic primer (with undiluted material) over the MIX mat GFM mesh @ 0.25 Kg/Sqm as a water tight primer in white colour and allow to dry for a period of 6 hours. 4. Fourth layer – MIX GUARD HR (Base Coat) : Apply one coat of Mix Guard HR acrylic based water proof and weather proof coating in white colour (with undiluted material) @ 0.50 kg/sq.m as a membrane on top of Mix prime AC and allow to dry for a period of 6 hours. 5. Fifth Layer – Mix Guard HR Extra (Top Coat) : Apply one coat of Mix Guard Hr Extra acrylic based fibre reinforced water proofing and heat reflective membrane in white colour on top of Mix Guard HR base coat (With undiluted material) @ 0.50 kg/sq.m. And allow to dry the system for period of 24 hours to allow foot traffic. Note: All the materials namely Mix Prime AC100, Mix Mat GFM70/50, Mix Prime AC, Mix Guard HR and Mix Guard HR Extra shall be procured for the entire work order quantity based on the consumption/coverage area as specified in the specification and shall be ensured by Engineer-in-charge. The Mix Guard HR5 layer system shall be carried out as per FAB Specifications.