Roof Waterproofing
in Kanpur
Stop leaks and cut cooling costs with elastomeric and bituminous roof systems — engineered for Kanpur’s extreme heat, monsoon downpours, and UV exposure.
Get Free InspectionWhat is it?
Complete Roof Waterproofing Systems
Roof waterproofing in Kanpur must withstand two opposing extremes: monsoon rainfall that can exceed 80 mm in a single day, and summer surface temperatures that approach 75°C on dark concrete roofs. A system that performs in both conditions requires careful selection of membrane type, thickness, and detailing — particularly at the critical parapet junction.
APP/SBS modified bituminous membranes are torch-on sheets reinforced with polyester or glass fleece. Once heat-welded to the prepared substrate, they form a fully bonded, seamless system capable of withstanding hydrostatic pressure and foot traffic. APP modification gives them excellent UV resistance and high-temperature performance — ideal for Kanpur’s unshaded flat roofs.
Heat-reflective elastomeric coatings such as Roof Kool & Seal use titanium dioxide pigmentation to reflect over 85% of solar radiation, reducing interior cooling loads significantly and extending the life of the waterproofing system itself by preventing thermal degradation.
All penetrations, drains, parapet junctions, and expansion joints are treated as critical detailing points — reinforced with polyester fabric and sealed with compatible joint sealant — because these are where 80% of all roof leaks originate.
Signs Your Roof Needs Waterproofing
- Water dripping from ceiling or seeping through light fixtures
- Yellow or brown stains and bubbling paint on top-floor ceilings
- Cracks running along parapet walls or at the parapet-to-roof junction
- Peeling or blistering paint on the top-floor interior walls
- Moss, algae, or plant growth on the roof surface
- Visible ponding water on the roof 48+ hours after rain
A single monsoon season with an untreated roof can cause ₹50,000+ in interior damage. Act now.
Book Free InspectionOur Process
Our 5-Step Approach
From survey to flood test — every roof project is documented and backed by a written warranty.
Roof Survey
A comprehensive walk-over survey documents crack locations, drain conditions, parapet junctions, existing coating failures, ponding areas, and service penetrations — all photographed and mapped.
Drainage Assessment
Roof slopes are checked with a digital level. Blocked or undersized drains and outlets are identified. Where necessary, we recommend re-screeding to correct slopes and eliminate ponding zones before applying any waterproofing.
Surface Prep — Screed & Prime
Loose, debonded, or contaminated existing surface material is removed. Cracks are filled with polymer-modified mortar. A purpose-formulated primer is applied to improve adhesion and eliminate outgassing under the new system.
Membrane or Coating Application
The specified system — Roof Kool & Seal elastomeric coating, PU Roofkoat flexible membrane, or Bitumen Torch Membrane — is applied in the correct sequence, number of coats, and thickness, with reinforcement fabric at junctions and penetrations.
Flood Test & Warranty
After the system has fully cured, drains are plugged and the roof is flooded with 75 mm of water for 24 hours. Any seepage is marked, fixed, and re-tested before the signed warranty certificate is issued.
Specified Products
Products We Use
Specified for Kanpur’s climate extremes — every product is tested for UV stability, thermal cycling, and monsoon durability before we put it on a roof.
Roof Kool & Seal
Heat-reflective elastomeric roof coating that bounces back over 85% of incident solar radiation, reducing roof surface temperature by up to 20°C compared to conventional dark roofs. The seamless film bridges hairline cracks and repels monsoon rainfall — a Kanpur summer essential for top-floor comfort.
- Solar reflectance: 85%+
- Elongation: 200%
- Coverage: 1 L per 1.5 m²
PU Roofkoat
Single-component polyurethane flexible waterproofing membrane for flat roofs, terraces, and balconies. Once cured, it forms a rubber-like seamless film that accommodates structural movement, thermal cycling between Kanpur's −3°C winters and 48°C summers, and the constant UV bombardment of the Gangetic plain.
- Tensile strength: 4 MPa
- Elongation at break: 400%
- Service temp: −20°C to +80°C
Bitumen Torch Membrane
APP-modified bituminous torch-on membrane for heavy-duty flat roof waterproofing. The 4 mm thick reinforced sheet is heat-welded to the substrate for a fully bonded, seamless installation that withstands hydrostatic pressure, foot traffic, and the mechanical stress of solar panel installations.
- Thickness: 4 mm
- Modifier: APP (atactic polypropylene)
- Warranty: 10 years
Why Choose Katiyar Ventures?
Kanpur’s roof waterproofing specialists — built for the climate, backed by warranty.
10-Yr
Membrane Warranty
500+
Roofs Waterproofed
Free
Roof Inspection
100%
Leak-Free Guarantee
FAQ
Frequently Asked Questions
How often should I waterproof my roof in Kanpur?
The frequency depends on the system used. Elastomeric coatings such as Roof Kool & Seal should be inspected every 3–5 years and may need a maintenance coat after 8–10 years. PU Roofkoat and APP torch-on membranes carry 10-year warranties but should be visually inspected after each monsoon season. Kanpur's extreme summer heat (44–48°C roof surface temperatures) degrades some coating systems faster than temperate climates, so routine inspection is important.
What is the difference between a roof coating and a roof membrane?
A coating is a liquid product applied by roller or spray that cures to form a seamless flexible film. It is quick to apply and ideal for roofs in fair condition without significant structural movement. A membrane — either torch-on bitumen sheet or a thick-applied PU system — provides a more robust, self-supporting waterproof layer suited to roofs with significant ponding risk, heavy foot traffic, or where the substrate is cracked. We recommend the correct system based on your specific roof conditions.
What are the most common causes of roof leaks?
In Kanpur, the four most common leak sources are: (1) failed or cracked parapet-to-roof junctions, which undergo intense thermal movement; (2) blocked rainwater outlets that cause persistent ponding and pressure-force seepage; (3) cracks at service pipe and electrical conduit penetrations through the roof slab; and (4) delaminated or aged existing waterproofing that has cracked or bubbled, allowing monsoon water to enter through exposed concrete.
Do you waterproof open terraces, balconies, and podium slabs too?
Yes. We treat all horizontal exposed surfaces — residential terraces, commercial podium slabs, balconies, and mechanical plant rooms. Our PU Roofkoat system is particularly suited to balconies and terraces because it cures to a pedestrian-traffic-safe finish, is available in a range of colours, and can accommodate the small movement typical in cantilevered balconies. For occupied terraces, we also offer tile-over waterproofing systems using an anti-fracture membrane below ceramic or natural stone tiles.
Monsoon-Ready Your Roof This Season
Book a free roof inspection before the rains arrive. Our team covers all of Kanpur — Swaroop Nagar, Civil Lines, Kalyanpur, Armapur, and beyond.
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