Aztec West with Thermaweld

Complexity simplified with BMI Icopal’s Thermaweld system.
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The Project

BMI Icopal’s Thermaweld FireSmart system was specified for a 4250m2 flat roof at an office block in Bristol. Consisting of a series of octagons, the complex flat roofing system is now  securely guaranteed following a £6.5 million investment project managed by Trident Building Consultancy.

BMI Icopal Thermazone Torch-on Roof Insulation Boards combine excellent thermal performance with stability and strength, while BMI Icopal Total Torch Vapour Dispersion Layer stops blistering. 


Technical Support

“The technical support from BMI is always excellent.”

Matthew Goddard, Area Director at Mitie Tilley Roofing.

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 “We were looking for a good quality, high performance felt system with a long guarantee. BMI met this requirement with its 20-year product guarantee, good range of high performance felt products and its long-established reputation in the market.”

Andrew Hill, Associate Director at Trident Building Consultancy

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The Challenge

The Challenge

The challenge with this project was to replace a 27 year old roof with good quality waterproofing and a hard wearing system with a long guarantee.

The existing roof had reached the end of its usable life and required full replacement to provide a good quality waterproof covering as well as meet current Building Regulations.

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The Solution

The Solution

Installed by Mitie Tilley Roofing, the new roof consists of BMI Icopal Total Torch Vapour Control Layer, 120mm BMI Thermazone Torch-on Roof Insulation Boards and tapered insulation, Total Torch Vapour Dispersion Layer and charcoal Thermaweld FireSmart Mineral Capsheet.

Suitable for both new and refurbishment projects, BMI Icopal Total Torch Vapour Control Layer was installed beneath the insulation – this acted as temporary weatherproofing before the final waterproofing system was applied.

Thermaweld FireSmart Torch-on capsheets are 30% faster to apply than traditional torch-on membranes and their mineral surface provides a decorative and solar reflective finish for the built-up waterproofing system.

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The Impact

The Impact

"Tapered insulation was designed and detailed by BMI to create falls in the areas of the building that had flat decking, with sumps to the perimeter to keep ponding water to a minimum. Regular inspection visits by the BMI technician ensured that any difficult details were overcome quickly and effectively, ensuring a very high standard of work,” said Matthew Goddard (Area Director, Mitie Tilley Roofing).

Together these components construct a tough, premium roof that withstands weather and foot traffic and, when installed to BMI’s specification and by an approved contractor, qualifies for a comprehensive, insured guarantee cover of up to 20 years.

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Tested. Trusted. Tailored.

Thermaweld is one of the UK’s most trusted bitumen flat roofing systems, it’s tried, tested and reliable so you and your clients don’t have to worry.

Key features

  • Faster application because of its unique mini groove technology

  • Technically advanced low heat-reactive bitumen

  • Lap security for maximum resistance to wind uplift

  • Tested, Tailored. Trusted, with up to 20 year guarantee

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