Complexity simplified with BMI Icopal's Total Torch system

The roof was 27 years old, had a complex structure and required a quality waterproofing and hard wearing system complete with a long guarantee.

BMI Icopal’s Total Torch 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.

“The existing roof had reached the end of its useable life and required full replacement to provide a good
quality waterproof covering as well as meet current Building Regulations,”says Andrew Hill, Associate Director at Trident. “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.”

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

“The technical support from BMI is always excellent,” says Matthew Goddard, Area Director, Mitie Tilley Roofing. “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.”

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.

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