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Lava20 Roofing System — Next-Generation Flat Roofing in Cumbria

Advanced Liquid-Applied Roofing Technology for Superior Protection

Mr Roofer UK is proud to offer the Lava20 liquid-applied roofing system across Cumbria and North Lancashire. This cutting-edge cold-applied technology creates a seamless, fully bonded waterproof membrane without the need for hot works, naked flames, or mechanical fixings. Ideal for complex roof shapes, detail-heavy areas, and situations where fire-risk management is essential. Installed by our City & Guilds certified, LRWA-registered team.

Why Lava20 Is Transforming Flat Roofing in Cumbria

Mr Roofer UK Lava 20 roofing system installation

Cold-Applied Innovation

Lava20 represents a genuine leap forward in flat roofing technology. Unlike traditional torch-on felt that requires open flames, or GRP fibreglass that uses catalysed resins with strict temperature requirements, Lava20 is a cold-applied liquid membrane that cures to form a seamless, rubber-like waterproof coating across the entire roof surface. The system bonds directly to the substrate — whether that is concrete, timber, existing felt, metal, or asphalt — conforming perfectly to every contour, upstand, pipe penetration, and drainage outlet without the need for separate trims or flashing pieces. For complex roof geometries common on older Cumbrian properties, this ability to follow irregular shapes and transitions eliminates the vulnerable junction details that cause failures in conventional sheet-based systems.

No Hot Works, No Fire Risk

One of Lava20's most significant advantages is the complete elimination of hot works from the installation process. There are no gas torches, no naked flames, and no heated bitumen anywhere on your property during installation. This makes Lava20 the preferred choice for schools, care homes, occupied commercial buildings, and domestic properties where fire risk must be minimised. Insurance companies increasingly recognise the reduced risk profile of cold-applied systems, and many contractors working on sensitive buildings are now specifying Lava20 precisely because it removes the fire hazard that has historically been associated with felt roofing installations. Our team at Mr Roofer UK has extensive experience installing Lava20 on properties across Cumbria where traditional hot-applied methods would pose unacceptable risks.

Outstanding Durability and Flexibility

Once cured, the Lava20 membrane exhibits remarkable elasticity, stretching to accommodate building movement, thermal expansion, and the subtle structural shifts that all buildings experience over time. This flexibility, combined with excellent UV resistance and an ability to bridge hairline cracks in the substrate, delivers long-term waterproofing performance that rivals or exceeds EPDM rubber and GRP fibreglass systems. The membrane can also be over-coated in the future to extend its service life indefinitely, making it a genuinely sustainable roofing choice. As Roofing Trade Association members and Bark-reviewed professionals verified through the Lancashire County Council Safe Trader Scheme, we stand behind every Lava20 installation with comprehensive guarantees and detailed photographic documentation.

Our Lava20 Roofing Services

  • New Lava20 liquid-applied flat roof installations on domestic extensions, garages, and outbuildings, creating a completely seamless membrane that bonds directly to the substrate without seams, joints, or mechanical fixings — delivering the ultimate in watertight protection for Cumbrian properties of every type and age.
  • Lava20 overlay applications onto existing failed felt, asphalt, and single-ply roofs, encapsulating the old covering and creating a new waterproof surface without the cost, waste, and disruption of stripping the existing roof — particularly effective for flat roof refurbishment projects.
  • Complex detail work around roof penetrations, pipes, vents, rooflights, and mechanical plant using Lava20's unique ability to conform to any shape and geometry, eliminating the pre-formed trims and collar pieces that conventional systems require and that often become the first point of failure.
  • Lava20 installations on balconies and accessible roof areas incorporating anti-slip aggregate finishes, providing a durable walkable surface that requires minimal maintenance and withstands regular foot traffic without the puncture risk associated with flexible EPDM membranes.
  • Fire-risk-free roofing solutions for schools, care homes, commercial premises, and occupied residential buildings where hot works are prohibited or undesirable, fully compliant with insurance requirements and building regulations governing work on occupied structures across Cumbria.
  • Gutter and valley lining using Lava20 liquid membrane, creating seamless waterproof channels that eliminate the joints and seams found in traditional metal or GRP gutter linings, particularly effective for rehabilitating deteriorated cast iron and concrete gutters on period properties.
  • Integration of Lava20 flat roof sections with lead flashing and pitched slate or tile roofing, using the membrane's direct-bonding capability to create waterproof transitions at abutments and valley junctions without complex mechanical fixing details.
  • Maintenance re-coating services for existing Lava20 and other liquid-applied roofing systems, refreshing the UV-protective topcoat to extend membrane life and restore the roof's appearance, a cost-effective alternative to full replacement that can be carried out with minimal disruption.
Mr Roofer UK Lava 20 roofing system installation

Lava20 Roofing FAQs

Lava20 is a next-generation flat roofing system that uses a volcanicite-reinforced liquid membrane to create a seamless, incredibly durable waterproof finish. It bonds directly to the roof substrate with no seams or joints, eliminating the most common failure points in flat roofing.

Lava20 is designed to last upwards of 20 years with minimal maintenance. The system is UV-stable, freeze-thaw resistant, and can handle the extreme weather conditions common in Cumbria without cracking or degrading.

In most cases, yes. Lava20 can be applied over existing felt, asphalt, concrete, and other substrates provided the deck is structurally sound. This makes it an excellent refurbishment option without the cost and disruption of a full strip-and-rebuild.

Lava20 offers several advantages over traditional systems. It's fully seamless so there are no joints to fail, it's highly flexible so it moves with the building, and it cures to form a rock-hard finish. For flat roofs that need a long-term, low-maintenance solution, it's one of the best options available.

Yes. Lava20 installations come with a manufacturer-backed guarantee. The exact terms depend on the specification and application — we'll confirm the guarantee period in your quote.

Most domestic flat roofs can be completed in 1 to 2 days depending on the size and preparation required. The system cures quickly, so your roof is watertight the same day it's applied.

Pricing depends on the roof size, condition of the existing deck, and access requirements. As a premium system, Lava20 costs more than basic felt but offers significantly better longevity and performance. We provide free quotes — call 07783 310439 to discuss your project.
Mr Roofer UK Lava 20 roofing system installation

Recent Lava20 Roofing Projects

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School Extension Lava20

Cold-applied Lava20 installation on a primary school extension in Ulverston — zero hot works on an occupied building. View this project

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Bungalow Flat Roof

Full Lava20 overlay on a bungalow flat roof in Coniston, applied directly over the existing felt covering. View this project

Mr Roofer UK official company logo showing a red hexagonal badge with crossed hammers and house icon

Commercial Lava20 Roof

Large-area Lava20 liquid membrane on a retail unit in Kendal with complex penetrations and plant equipment. View this project

Lava20 Roofing Near You

Discover the Lava20 Difference

Experience the next generation of flat roofing technology with Mr Roofer UK's Lava20 installations. No flames, no seams, no compromise — just seamless waterproof protection that lasts decades. Contact our City & Guilds certified team today for a free survey and no-obligation quotation across all of Cumbria and North Lancashire.

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