The solid-brick (no cavity) house we've just bought currently has no insulation on its external walls - something we'd like to change.
After research elsewhere online and in this forum I thought we'd dot & dab 25mm Celotex PL3000 (the Celotex that's combined with 12.5 mm plasterboard) to minimize installation time. I'm thinking 25mm as Celotex claims to be twice as efficient as traditional insulation so we'd effectively achieve a 50mm insulation layer. http://www.celotex.co.uk/Products/Celotex-Products/Celotex-PL3000
But do we also _need_ to apply a breathable membrane on to the wall before fitting the Celotex? If we did fit the membrane then presumably we'd need to use batons rather than dot & dab on to the membrane.
Then my head really started to spin; if we line the walls with the breathable membrane but then screw batons to the wall in order to fix the Celotex.... aren't we breaking the membrane by screwing through it?
Comments would be much appreciated.
Thanks,
Steve[/url][/i]
After research elsewhere online and in this forum I thought we'd dot & dab 25mm Celotex PL3000 (the Celotex that's combined with 12.5 mm plasterboard) to minimize installation time. I'm thinking 25mm as Celotex claims to be twice as efficient as traditional insulation so we'd effectively achieve a 50mm insulation layer. http://www.celotex.co.uk/Products/Celotex-Products/Celotex-PL3000
But do we also _need_ to apply a breathable membrane on to the wall before fitting the Celotex? If we did fit the membrane then presumably we'd need to use batons rather than dot & dab on to the membrane.
Then my head really started to spin; if we line the walls with the breathable membrane but then screw batons to the wall in order to fix the Celotex.... aren't we breaking the membrane by screwing through it?
Comments would be much appreciated.
Thanks,
Steve[/url][/i]