Waterproofing Solution Bangladesh

Waterproofing Solutions

Water ingress is one of the most common and costly problems in Bangladesh construction. NJAF Engineering provides a comprehensive range of waterproofing systems for flat roofs, terraces, below-grade basements, tunnels, water tanks, and wet rooms.

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Roof Waterproofing

Liquid membranes and sheet systems for flat and pitched roofs.

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Basement Protection

Negative and positive-side waterproofing for below-grade structures.

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Water Tank Lining

Potable-water-approved coatings for reservoirs and tanks.

System Types

System	Application	Thickness
Cementitious	Water tanks, basements	2–4 mm
Crystalline	Concrete structures	Penetrating
Liquid Membrane	Roofs, balconies	1–2 mm
Bituminous Sheet	Foundations, roofs	3–4 mm
PU Membrane	Roofs, podiums	1.5–2 mm

💡 All our waterproofing systems include a 10-year performance warranty and free site inspection throughout Bangladesh.

Frequently Asked Questions

Which waterproofing system is best for a rooftop in Bangladesh?

For flat rooftops exposed to monsoon rain and heat cycling, we typically recommend liquid PU membrane or bituminous sheet systems, which handle thermal movement and ponding water better than cementitious coatings alone.

How long does roof waterproofing last?

Depending on the system used and roof exposure, professional waterproofing typically lasts 10–15 years before requiring recoating or maintenance.

Can waterproofing be done during the rainy season?

Waterproofing work requires a dry substrate, so it's best scheduled during dry weather windows; we assess site conditions and plan installation accordingly to ensure proper curing.

What is crystalline waterproofing used for?

Crystalline waterproofing is a penetrating treatment used for water tanks, basements, and below-grade concrete structures, as it becomes part of the concrete matrix and self-seals hairline cracks over time.

Waterproofing Solution