LAVA 20 Waterproofing System Ireland

A single-component liquid polyurethane membrane designed for durable, seamless waterproofing with a 25-year service life. BBA, CE and ETA certified for flat roofs, balconies, podium decks, and car parks.

UV Stable 25-year service life

Seamless Membrane No joints, no weak points

High Elasticity 400-600% elongation

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LAVA 20 liquid membrane application on flat roof

Completed LAVA 20 waterproofed roof in Ireland

Key Benefits

Why Choose LAVA 20?

Seamless protection. Proven durability. Built for flat roofs.

Seamless Waterproof Membrane

No joints, no weak points.

Cold Applied System

Safe installation, no disruption.

High Flexibility

Adapts to roof movement without cracking.

Excellent Adhesion

Ideal for concrete, felt, asphalt & metal roofs.

When To Use LAVA20

When Is LAVA20 the Best Choice for Flat Roofs?

LAVA20 is a liquid-applied waterproofing system used where a flat roof requires reliable protection, flexibility, and controlled application, particularly on roofs that do not require spray-applied systems.

This solution is commonly selected when:

The existing flat roof is structurally sound
The surface requires a fully sealed waterproof layer
Access or site conditions are not suitable for spray systems
The roof has multiple details, edges, and penetrations
A controlled, staged application process is preferred

Once applied, LAVA20 forms a seamless, elastic membrane that bonds directly to the roof surface. This eliminates laps, joints, and weak points typically associated with traditional flat roofing systems. Because LAVA20 remains flexible after curing, it can accommodate normal roof movement, thermal expansion, and minor substrate changes without cracking.

How It Works

LAVA20 System Build-Up – How the Waterproofing Works

The performance of the LAVA20 system depends on correct preparation, reinforcement, and application, rather than simply applying a coating to the surface.

Where required, the LAVA20 installation process includes:

Roof inspection and assessment
Surface cleaning and preparation
Priming of the existing substrate
Reinforcement of joints, seams, and roof details
Application of the LAVA20 liquid membrane
Final inspection and curing

The liquid membrane cures to form a continuous, waterproof layer that fully bonds to the roof surface. Because the system is applied in liquid form, it is particularly effective at sealing complex shapes, awkward details, and transitions where sheet-based systems often fail.

LAVA20 Can Be Used To:

Restore ageing flat roofs
Seal existing felt and membrane systems
Protect roofs with complex detailing
Extend the service life of existing roofs

Watch: LAVA20 system application process

Aged felt roof requiring waterproofing treatment — Aged Felt Roof

Flat roof sealed with LAVA20 waterproofing system — LAVA20 Sealed

Ready to Protect Your Roof?

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Protect your flat roof with a seamless, long-lasting waterproof membrane. Our team will assess your roof and recommend the best solution.

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LAVA 20 Waterproofing System Ireland