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.
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Tested. Trusted. Tailored.

At BMI Icopal, we believe that your flat roof should be reliable throughout its life, protecting against whatever the world sends its way, from day one. That’s where Thermaweld comes in, as it’s one of the UK’s most trusted bitumen roofing systems.  

Tried, tested and reliable flat roof system ideal for new build construction

Thermaweld is a flat roofing system that has been designed and tested in the UK at industry-leading testing facilities that have been custom-specified and tailor made for the unique projects and demands of flat roofs in the UK. 

It offers new build contractors trusted performance over a long lifetime of low risk and low maintenance, high safety, and reassurance, to pave the way for safer roofs. 

At BMI Icopal, we believe a reliable flat roof should enhance a building at every step, through proven, full-system consistency, trusted support, and peace of mind. This is the belief Thermaweld was built on. Tested. Tailored. Trusted

A flat roof you can rely on to be right the first time.

Intended for use as the capsheet within a bituminous built-up roofing system, Thermaweld has a self-finished mineral surface that provides a decorative and solar reflective finish for the built-up flat roof waterproofing system.  

The elastomeric membranes have been developed for use as a top sheet in high performance built-up systems on flat, pitched or even curved roofs. When incorporated in a suitably designed multi-layer system in your new build construction, it will improve the long-term performance. 

Thermaweld has been designed to meet the challenges that flat roofs in the UK face. It is impervious to water, insect attacks, pest damage and is unaffected by fungi, moss, lichen, moulds, and bacteria. It’s also unaffected by freeze, thaw cycles as it supports temperatures from -20° to 90° without damage. 

Backed by the tailored service and premium experience of BMI Icopal’s specification and technical team, working with you from design to handover, Thermaweld can give you absolute confidence and certainty from the start, for a roof you can rely on to be right the first time. 

Main features

  • Faster application because of its unique mini groove technology

  • Technically advanced low heat-reactive bitumen

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

  • BBA certified (07/4409 - Product Sheet 4)


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