Lobster wrote:
Bob Mannix wrote:
"sm_jamieson" wrote in message
oups.com...
My plans for the extension contains the usual wording about
ventilation and windows:

Windows to habitable rooms to have opening vents not less than 5%
floor area of room, plus 8000mm2 controllable trickle ventilation.
Kitchens and bathrooms to have 4000mm2 controllable trickle
ventilation. But I've been looking at the UPVC windows around and the
trickle
venting seems to be ugly sliding things on the inside, horizontal
slots on the outside, and looks horrid. Also, it is a noise path
even when "shut". What is the alternative to these, that will
satisfy the regs ?

I don't believe there is as, to satisfy the regs, you will need a
FENSA certificate for the windows and FENSA certified units will
come with trickle vents automatically. I supect you wouldn't get a
FENSA certificate without the vents either as it's not their job to
see if you are sorting out ventilation in some other way, just to
certify the windows.

Might be worth checking with your local BCO whether they are an
absolute requirement. They aren't round my way; I have no idea why. I've
fitted several under BCO supervision with no problem at all. The local
window manufacturers are well aware and I think don't
routinely fit the trickle vents!

David

I agree, around here no one cares neither...the BCO probably isn't
interested in the slightest.