Roof & Terrace Waterproofing

Roof and terrace waterproofing is perhaps the single most important protective treatment for any building in Kolkata, where the monsoon season brings relentless rainfall that can devastate unprotected structures. At Islamia Paints & Decor, we offer a comprehensive range of roof and terrace waterproofing solutions tailored to different roof types, budgets, and performance requirements. Our most popular system is the elastomeric coating approach — using liquid-applied membranes from Dr. Fixit (Roofseal, Pidicrete, Feviwrap), Berger (Torch-on Membrane, Roof Guard), and Sika (SikaRoof M-18, SikaTop) that form a seamless, flexible, and UV-resistant waterproof barrier over the entire terrace surface. These coatings can stretch and contract with temperature changes without cracking, making them ideal for Kolkata's climate where roof surface temperatures can swing from 25 degrees in winter to over 60 degrees in summer. For flat concrete rooftops that experience standing water during heavy rains, we recommend a multi-layer system combining a base coat of cementitious waterproofing slurry, a reinforcing fibre-glass mesh layer, and a top coat of UV-resistant elastomeric paint. For buildings with existing terrace gardens or those planning to create one, we provide specialised root-resistant waterproofing membranes that prevent plant roots from penetrating the waterproofing layer. For sloped roofs with tiles or metal sheeting, we offer tile adhesive-based waterproofing and specialised metal roof sealants. Our roof waterproofing service includes a thorough inspection of the existing roof condition, identification of all weak points (cracks, construction joints, pipe penetrations, parapet wall junctions), surface cleaning and preparation, application of the selected waterproofing system with all necessary reinforcing details, and a final flood-test to verify water-tightness before handover. Every project comes with a 5-10 year manufacturer warranty on materials plus our own workmanship guarantee. We serve individual homeowners, housing cooperatives, commercial buildings, and industrial facilities across Topsia, Park Circus, Salt Lake, New Town, and all Kolkata areas.