On Wed, 05 Oct 2005 20:59:54 +0000, Brian Reay wrote:



"Andrew Gabriel" andrew@a17 wrote in message
.. .
In article ,
"Brian Reay" writes:

But, the foil will act as a vapour barrier, all be it an imperfect one,
which is a worthwhile reason to do it.

It's not.
The permiability of the plasterboard is very much lower than
the rate moisture escapes from even a poorly ventilated loft.

So why do building regs now specify foil backed plasterboard?

There are plenty of regs which have only a marginal impact of the quality
of the end result, but make significant cost implications for compliance.
This problem is not confined to the BRs.



--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
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