Tender For supply of dismantle the existing gypsum board false ceiling , controlled removal of loose damaged tiles from the wall , dismantling of 3 to 4 inches backing plaster , dismantling of damaged concrete offsets , 20 mm thick cement plaster on exterior walls , providing and applying rust removing chemical , providing and applying injection grouting with admixture , 20 mm thick cement mortar plaster with 6mm down crushed stone , providing and applying two coats exterior acrylic emulsion paint , providing and laying 50mm thick cement concrete screed , providing and fixing 4mm thick app membrane , providing and fixing 6.5 mm thick moisture resistant false ceiling , supply and installation of rainwater down comer