Building Repair & Renovation Tenders

Water proofing for old and new roof slab:-Providing and laying water proofing treatment on roof slab by applying two component, factory designed ready to use, acrylic modified flexible material applied with brush,roller or spray for water proofing coating as per manufacturer specifications with following steps:-(a)Surface preparation:-Providing and cleaning of concrete surface to remove dust,oil, grease including removal of existing loose paint/coating and cement laitance by cleaning with compressed air & water jet including all materials, labour,tools complete.Ponding test to be done after plugging all outlets and to be checked from soffit to identify seepage, leakage.On identification of seepage, cement grouting to be done with non shrink expanding admixture of sika india pvt ltd/MYK schomberg.Dr fixit/fosroc or equivalent.Providing and repairing of all corners and joints such as those between the parapet wall and the roof slab etc shall be chamfered with 150mmx150mm fillet of mortar (Cement:sand-1:4) admixed with acrylic polymer of Sika/Fosroc/MYK schomberg/Dr fixit or equivalent. Before chamfering a prime coat shall be given with the slurry of acrylic polymer repairing surface irregularities, damaged concrete in base slab, dead cracks if any,with an acrylic polymer modified repair mortar including a coat of bonding agent of the same with cement slurry including all material ,labour, tools,complete.(b)1st Coat:- Apply 1st coat of two component acrylic modified, ready to use, flexible cementetious material on surface saturated dry roof and inside wall of Parapet wall upto 600mm by brush or roller. After 1st coat of application , 45gsm of fibre glass cloth to lay when the 1st layer is still green. 1st coat should be applied @1.50kg/sqmt/coat. For the purpose of measurement the entire treated surface will be measured." (c) 2nd Coat:- To apply the 2nd coat of two component acrylic modified ,ready to use, flexible cementetious material right angle to the 1st coat over the glass fibre laid surface. 2nd coat should be applied @ 0.7kg/sqmt/coat.For the purpose of measurement the entire treated surface will be measured."After three days of drying the 2nd coat, the rain water outlets to be plugged and ponding test to be done for 48 hours to identify seepage,leakage from soffit and if found necessary rectification to be done as per satisfaction of E/C.The waterproofing coating to be protected from damage before screed over it. Waterfroofing brand: Sika topseal109hi/Fosroc brushbond RFX/Dr fixit pidiffin 2k/MYK aquafin TG product performance-chemical base PartA. Acrylic copolymer,PartB specially graded cementitious powder-density 1.6kg/l (mixed density)at+27 deg C Tensile strength-2N/sqmm after 28 days (with fibre cloth) according to ASTM D 2370 pullout bond strength-2N/sqmm(concrete failure)(According to ISO 4624) Slant shear bond strength=4N/sqmm(According to FIP 5.15) Elongation at break -35% without fibre cloth and 20% with fibre cloth(According to ASTM D 2370). (d) Protection of treated surface with PCC:- The treated surface should be covered with 25mm/50mm PCC of M-20 grade(1:1.5:3)with proper slope (1:120) towards the rain outlets in alternate panels of 2mlx2ml keeping 6mm gap between the panel joint.Integral water proofing admixture conforming to IS 2645 @100ml per bag of cement to be added in the screed concrete(paid sparately for this items) all corners shall be chamfered with 150mmx150mm fillet.The rainwater outlets shall be just levelled up with screed concrete to ensure smooth discharge of water-the perepheral gaps between pvc pipe outlet and concrete surface should be packed properly with rich concrete and the peripheral mouth to be sealed with moisture insensitive epoxy putty of Sika India Pvt.Ltd/MYK Schomberg/Dr fixit/Fosroc.For the purpose of measurement the entire treated surface will be maesured." (e)Groove of PCC surface should be filled with polysulphide sealant(Paid separately) Brand-Sika India Pvt Ltd/MYK Schomberg/Dr fixit/Fosroc. Warranty for five years.

Repair to plaster of thickness 12mm to 20 mm in patches of area 2.5 sqm and under,including cutting the patch in proper shape, raking out joints and preparing and plastering the surface of walls complete including disposal of rubbish to the dumping ground within 50 meters lead with cement mortar 1:4 (1 cement: 4 coarse sand)