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Terrace Waterproofing
APCOBUILD SURESEAL + ApcoBuild Seal N Safe + ApcoBuild SureSeal
Clean the surface free of dirt, dust, laitance, etc and inspect for cracks.Any cracks (greater than 0.5 mm) should be filled with ApcoBuild Seal 'N' Safe modified mortar on which apply a coat of Apcobuild Sure Seal, a two-component polymer modified cementitious coating maintaining a width of 50 mm on either side of the crack. On the wet membrane, lay a non-woven fabric and apply a second coat of ApcoBuild SureSeal or equivalent.
The junction of the walls and the slab is rounded using cement mortar of 1:4 admixed with ApcoBuild Hydrotite IWC or equivalent (integral waterproofing compound @ 200 ml per 50 kgs of cement. Prior to laying of the fillet, prime the surface with a bonding slurry of ApcoBuild Seal N Safe or equivalent (Styrene Butadiene Rubber based latex compound) and cement mixed in the in the ratio 1:1 by volume.

The openings around the rainwater pipes are packed with ApcoBuild Seal N Safe modified mortar in the ratio of 1:1:4 by volume (RBR: Cement: Sand) and well compacted & finished. After the mortar has set, ApcoBuild SureSeal or equivalent (two-component polymer modified cementitious coating) should be applied around the pipes in two coats. The concrete surface is thoroughly saturated with water & left over night. Two coats of ApcoBuild SureSeal or equivalent (two-component polymer modified cementitious coating) is applied on the clean and saturated surface at a coverage of 6-7 sft per kg in two coats giving an average thickness of 1-1.5mm. The second coat is applied after 6-8 hours of drying of the first coat. The coating is extended upto the 300mm height along the parapet wall. In the event of the coating being discontinued, resumption of the coating should be done by providing an overlap of 50 mm on the old layer. When the second coat of the waterproof membrane is still tacky, 12 mm thick cement mortar (1:5) is laid and cured for a minimum of 3 days. This is required to prevent damage/puncture to the membrane during subsequent works. Suitable gradient should be provided towards the rain water pipes either by laying BrickBat Coba on the fresh mortar screed or providing Screed concrete.

Option A: Brick Bat Coba
When the cement mortar is still fresh, brickbats are placed with a gap of 20mm and maintaining
suitable gradient towards the rainwater outlets. Cement mortar (1:4) mixed with ApcoBuild Hydrotite IWC or equivalent (integral waterproofing compound @ 200 ml per bag of 50 kg cement is packed into the joints of the brickbats. After the mortar in the joint sets, water is ponded on the brickbats for a minimum of 3-4 days to ensure the soundness of the brickbats. The water is then removed and cement mortar (1:4) admixed with ApcoBuild Hydrotite IWC - integral waterproofing compound @ of 200 ml per 50 kg cement is laid to a thickness of 15mm maintaining slopes towards the rain water pipe and finished making a checkered pattern on the wet mortar.
Option B: Screed Concrete
After the cement mortar screed on the waterproofing membrane is well cured, screed concrete of
1:2:4 (by volume) admixed with ApcoBuild Hydrotite IWC (integral waterproofing compound )
@ 200 ml per 50 kg cement. When the concrete is still wet, a checkered pattern is created to
prevent cracking of the top concrete.
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Disclaimer: These suggestions and data are based on information which we believe to be reliable. They are given for information only and in good faith, but without guarantee, as conditions and methods of use of our products are beyond our control. We recommend that the user determines the suitability of our materials and suggestions before adopting them on a commercial scale.