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Peter Johnson Peter Johnson is offline
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Default Trickle vents in replacement windows

On Fri, 11 Feb 2011 11:33:58 +0000, David Hearn
wrote:


So, do people see trickle vents as necessary, ideal, waste of time,
legally required? If we want some air in, we can open the window a little.

I've been puzzling over this recently. None of the 20-year-old windows
that I inherited with this house had vents but the patio door had a
fake one. When I had this replaced by french doors nearly three years
ago the d/g surveyor insisted on a vent although the salesman thought
the size of the room made it unneccessary. Two windows installed in my
extension during construction last year have vents. None of the
remaining windows that I had replaced in January have them. It could
be a question of replacing like with like, I don't know, but vents
weren't mentioned at all and I never thought about them until after
the job was finished. Being thin plastic vents can't do much for the
thermal efficiency of the windows.