TLX Gold brings Museum up-to-date

TLX Gold brings Museum up-to-date

Grade II listed? No problem

insulating breather membrane boarded roof gloucester musuemThe Museum of Gloucester is a grade II listed building famous for its Romans kitchen playhouse and medieval street. Built in 1860 it was in need of a major refit, which included improving the energy efficiency of the boarded roof. Since raising the roof considerably was not considered an option, the chosen solution was to have a layer of TLX Gold used over the boarding, draped over counter battens with the tile battens going directly on top.TLX Gold insulating breather membrane used on a boarded roof

The problem: how to decide the best way to insulate a boarded roof given the financial and constructional constraints of the job.

The solution: TLX Gold can be used directly over the boarded roof, draped over 50mm counter battens, to leave an unventilated air gap between the low emissivity breathable under-surface and the boarding, giving a U value of 0.67 W/m2K. If it is possible to raise the roof then a continuous sheet of PIR between the two can reduce it much further – to meet Building Regulations requirements of 0.18 W/m2K if 85mm PIR is used.

There is no condensation risk if a well-sealed ceiling is in place, and a risk analysis calculation can be carried out for other buildups, even including those which have additional insulation between the rafters such as might be necessary for new build designs.

Click to view the full LABC registered TLX Gold boarded roof solution

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