EWS199B Boulder Developments Superfoil SF40


SF40 is a multilayer foil insulation for use in roofs and cavity walls in new build, renovation and conversion constructions.    


Valid until 11th August 2022


Please Note: Every care was taken to ensure the information was correct at the time of publication. Any written guidance provided does not replace the user’s professional judgement. It is the responsibility of the dutyholder or person carrying out the work to ensure compliance with relevant Building Regulations or applicable technical standards.


Boulder Developments Limited
Registered Office:
Black Horse Farm
Main Street
NG23 6JN
01636 639900