How to check when double glazing was installed?

RedFraggle

The fitter may also have just registered it with Building Control. The requirement being to meet regs which can be achieved via Fensa and certas

chanz4

if over 10 years, wont really matter

lincroft1710

If you believe the patio door is still under warranty (or guarantee) then ask the vendor if you can see the certificate. Apart from older units "blowing", the main concern with PVCU glazing is that if it replaced timber windows which did not have lintels above then steel or concrete lintels should have been installed before the PVCU units were fitted

Section62

HumberFlyer said:

Mine have a date stamped on the watsit between the panes

Dates marked on the sealed units (probably*) relate to the date of manufacture of the sealed unit, which isn't necessarily the same as the date the windows were made - e.g. if replacement sealed units have been installed.

*The date on the watsit (aka "spacer bar") could be when the spacer bar was manufactured... which could be quite some time before the sealed unit was made.

The uPVC extrusions making up the frame and sashes are also likely to have a manufacturing date on them... but possibly on the outer periphery of the frame (so hidden by the walls) or on the inside of the sashes (so hidden by the sealed unit), so not necessarily visible without doing some work.

womble12345

Thanks for all the responses, I think I was worrying about nothing but I will ask the vendor at some stage.

hedgewitchery

I recently had a window replaced, and the certification thingy came from a body called NAPIT? I was surprised it wasn't FENSA, as that was the only one I'd heard of previously.