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