Existing walls are generally 350mm Cotswold stone any external insulation system would be unacceptable to the planning authority in a conservation area.
Walls have been upgraded by the application of a plasterboard laminate total thickness 92 .5mm giving a U value of 0.22 w/sqm k. This standard is somewhat better than that required by current building regulations. There are relatively small areas of external wall, particularly around window and door jambs and reveals, where this level of insulation can not be maintained using conventional products. The use of Proctors Spacetherm would have been a good way to deal with these isolated "cold bridge" areas. Unfortunately this product is still extreemly expensive and as a compromise the jamb areas were insulated with a reduced thickness of Kingspan Insulation.
Walls have been upgraded by the application of a plasterboard laminate total thickness 92 .5mm giving a U value of 0.22 w/sqm k. This standard is somewhat better than that required by current building regulations. There are relatively small areas of external wall, particularly around window and door jambs and reveals, where this level of insulation can not be maintained using conventional products. The use of Proctors Spacetherm would have been a good way to deal with these isolated "cold bridge" areas. Unfortunately this product is still extreemly expensive and as a compromise the jamb areas were insulated with a reduced thickness of Kingspan Insulation.
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