Help Keep Boards Alive. Support us by going ad free today. See here: https://subscriptions.boards.ie/.
If we do not hit our goal we will be forced to close the site.

Current status: https://keepboardsalive.com/

Annual subs are best for most impact. If you are still undecided on going Ad Free - you can also donate using the Paypal Donate option. All contribution helps. Thank you.

https://www.boards.ie/group/1878-subscribers-forum

Private Group for paid up members of Boards.ie. Join the club.

Another window U-value question

radiat · 2012-03-03 17:14:00

Hi, Who determines the u-value of windows? Do the manufacturers themselves determine the u-values or is it independently verified? Also, if the windows are made to measure won't the U-value be slightly different for each one?

03-03-2012 05:14PM

#1

radiat

Registered Users, Registered Users 2 Posts: 151 ✭✭

Join Date: December 2009

Posts: 96

Hi,
Who determines the u-value of windows? Do the manufacturers themselves determine the u-values or is it independently verified? Also, if the windows are made to measure won't the U-value be slightly different for each one?

0

Comments

#2 06-03-2012 11:49AM

beyondpassive

Registered Users, Registered Users 2 Posts: 558 ✭✭✭

Join Date: December 2009

Posts: 555

It should be tested to a recognised norm such as a BS EN ISO 12567-1:2000 and ISO 10077-1:2006

It is best to separate the frame from the glass, the combined value can be vastly improved by using a small frame area and lots of good U-Value glass, so ask the suppliers for the frame U-Value and watch them squirm.

0