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"Conrad" wrote in message
...
Hi!
My current project is to have an enclosed front porch - that is an
add-on to the front of the house approximately 2 metres by 1 metre. It
will have double glazed windows and insulated roof. I had intended to
have cavity wall with a 2 inch/ 5 cm gap for insulation.
A surveyor acquaintance says that the firm he works for fits double
brick without a gap so as to allow an extra 2 inches internally per
wall.
This all sounds very well, but won't that defeat the object of having
energy efficient / double glazing? Or should I be cutting my costs and
having single glazing too? Any comments would be welcome.
Thanks
--
Conrad