Solutions

Waterproofing

Advanced waterproofing solutions for terraces, basements, water tanks, and wet areas — matched to how water actually reaches your structure.

The right protection for the way water actually reaches your structure.

Water is the biggest threat to a building’s lifespan. It gets in through roofs, basements, tanks, and everyday wet areas — and once it’s in, it damages concrete and steel from the inside. We provide waterproofing solutions across residential, commercial, industrial, and infrastructure structures by choosing the right system for each part of the structure, based on where the water comes from and how the space is used.

Terrace & roof

Roofs and terraces take the most direct hit from sun, rain, and daily temperature swings. Left unprotected, water finds its way through hairline cracks and damages the concrete and ceiling below. We waterproof terraces, roofs, podium decks, expansion joints and large industrial roofs.

PU waterproofing systems — seamless and flexible protection for exposed and weather-affected surfaces

1. Single-component PU, hand-applied
  • Applied by brush or roller directly onto the concrete surface.
  • Suited to smaller areas, detailed corners, and hand-finished work.
  • Two components combined and sprayed on to form one continuous membrane with no joints.
  • Suited to large roof and terrace areas needing fast, uniform coverage.
  • A single-ply synthetic sheet, heat-welded at the joints.
  • Resists punctures and long-term weathering — used on large industrial roofs and terraces.
  • A bitumen-based sheet membrane, rolled out and heat-sealed onto the roof surface.
  • Used selectively, based on project requirements and site conditions.
  • A single-component, UV-stable elastomeric coating.
  • Brush or roller-applied; bridges hairline cracks that blocks water while letting the surface breathe and resists sun exposure on exposed surfaces.

We waterproof basements, retaining walls, foundations, and other underground structures that sit below ground, under constant pressure from groundwater and damp soil. If water gets in here, it weakens the foundation and causes lasting dampness.

1. HDPE membrane
  • A pre-formed sheet membrane, bonded to the structure using pressure-sensitive adhesive.
  • Forms a continuous barrier against groundwater; our first choice for basement raft, retaining wall, and foundation waterproofing.
  • A flexible sheet membrane, resistant to chemicals and root penetration.
  • Used as an alternative to HDPE for basement walls, raft slabs, and underground structures.
  • A cement-based coating containing active chemicals that react with moisture in the concrete.
  • Forms crystals inside the concrete pores that block water paths from within — permanent, not surface-applied.

We waterproof and protect water tanks, reservoirs, and other water-holding structures under constant pressure, where even a small gap can develop into a leak over time.

1. Cementitious waterproofing
  • A cement-based system with waterproofing additives, bonded directly to the concrete surface.
  • Our standard system for water tanks and reservoirs.
  • A two-component spray coating that cures within seconds to minutes.
  • Forms a seamless, chemical- and abrasion-resistant layer — suited to tanks needing fast turnaround.
  • A two-component resin coating with high chemical resistance.
  • Used where a hard, protective, chemically resistant finish is required.
  • A non-toxic epoxy or PU system, certified safe for contact with drinking water.
  • Used specifically for potable water tanks (OHT, UG sump).
  • A synthetic HDPE or PVC liner, welded at the seams for large-area coverage.
  • Used for water containment, reservoirs, and industrial ponds.

Bathrooms, kitchens, toilets, balconies, sunken slabs, and utility areas are exposed to water daily, and constant moisture works into the floor and walls if not properly sealed.

1. Cementitious waterproofing
  • A cement-based coating with waterproofing active chemicals and additives.
  • Brush-applied; bonds directly with concrete — our standard system for bathrooms, toilets, kitchens, balconies, and sunken slabs.
  • A cold-applied liquid resin, cured chemically without heat or open flame.
  • Sets within 30–60 minutes — used for detailed areas and fast-turnaround work.
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Why Top A India
1000+ Projects completed
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15+ States covered
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18+ Years of expertise

Featured projects

KKNPP

Terrace Waterproofing
Anuvijay Township, Kudankulam, Tamil Nadu

Chennai Metro Rail Limited (CMRL)

Injection Waterproofing
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Mauritius Supreme Court

Basement Waterproofing
Mauritius

Brigade Group

Terrace Waterproofing
Bangalore, Karnataka

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