A friends building regs spec requires him to put 77mm celotex pl4000 on all exterior walls. I was thinking of doing a similar conversion. The problem is our buildings are old and have very small rooms.
Shower room internal size approx. 700 wide exterior wall one side, toilet about the same again exterior wall one side. Stairway 750 wide this is original, there is no room to even widen the rooms.
question: If you put 77mm walls inside these the rooms and passage way would be unusable. How does one meet thermal regs in these areas? Even the multi-foil system amounts to about 60mm.
Has anyone come across this complication?
It does seem contradictory to try and make a old building modern.
Shower room internal size approx. 700 wide exterior wall one side, toilet about the same again exterior wall one side. Stairway 750 wide this is original, there is no room to even widen the rooms.
question: If you put 77mm walls inside these the rooms and passage way would be unusable. How does one meet thermal regs in these areas? Even the multi-foil system amounts to about 60mm.
Has anyone come across this complication?
It does seem contradictory to try and make a old building modern.