On Tue, 18 Sep 2007 03:50:04 -0700, treenoakio wrote:

Hi, I'm planning to build an open fronted lean-to against the wall of
my house. On this wall, about 5' from the ground is a gas boiler flue
outlet ( a square steel plate with caged sides). Is it considered
acceptable to roof over the part of the wall with this outlet in it?
Regards,
Dick Treen

A good proportion of the gas fitting horror pictures published in "The
Gas Installer" (CORGI comic) are based on various creative ways people
have devised to build extensions without refitting the boiler.

What you may or may not do may or may not be listed out in the manual.
If there's no help in the manual then BS 5440 part 1 should help.
These standards might be available to download using the magic words
"british standard torrent".

If you find that the boiler can't be used with your new lean to then maybe
it's time to bring forward the boiler's replacement as the boiler is at
least half way through it's life.

--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html
Choosing a Boiler FAQ http://www.makewrite.demon.co.uk/BoilerChoice.html