Replacement windows (again)

nophd08

Hi all, I know this has been covered before, but i'm in the process of getting all my windows and doors replaced. House was built in 1999 and standard cheap double glazed pvc was fitted.
I've narrowed it down to two well known manufacturers, one does foam filled 'A' rated DG units, the other does six panel air gap 'A' rated DG units. Any argument for which is better technology? One is also not advising triple at all but will price for it if I really want it, the other is telling me to triple glaze north facing windows only.
Will TG lose me that much solar gain?
Just wondering what other peoples experiences have been in similair circumstances, ie replacement rather than new build.
Feedback welcome

BryanF

nophd08 wrote: »

Hi all, I know this has been covered before, but i'm in the process of getting all my windows and doors replaced. House was built in 1999 and standard cheap double glazed pvc was fitted.
I've narrowed it down to two well known manufacturers, one does foam filled 'A' rated DG units, the other does six panel air gap 'A' rated DG units. Any argument for which is better technology? One is also not advising triple at all but will price for it if I really want it, the other is telling me to triple glaze north facing windows only.
Will TG lose me that much solar gain?
Just wondering what other peoples experiences have been in similair circumstances, ie replacement rather than new build.
Feedback welcome

Have you considered comparing them based on overall u-value ?
Who will give the longest guarantee?
The triple glazing argument for losing solar gain is BS in the context of an Irish climate / typically there are more loses than gains here.
what is this 6 panel stuff?

nophd08

BryanF wrote: »

Have you considered comparing them based on overall u-value ?
Who will give the longest guarantee?
The triple glazing argument for losing solar gain is BS in the context of an Irish climate / typically there are more loses than gains here.
what is this 6 panel stuff?

Ok, so one company will give 15yr guarantee, the other 10.
U value same.
6 panel, I meant to say 6 separate air chambers within the frame.
Both have u/v value of 1.3w/m2 k
Both have NSAI cert
One uses kommerling extrusion from germany, the other was developed and is manufactured in the UK.
I suppose one is as good as the other, apart from 15yr guarantee.
Not sure if I can name these companys, but one is based in roscommon, the other seems to be nationwide.
I'm thinking that the gains from TG are minimal especially on an older house.

BryanF

Pleas don't name the companies thanks

runawaybishop

nophd08 wrote: »

Ok, so one company will give 15yr guarantee, the other 10.
U value same.
6 panel, I meant to say 6 separate air chambers within the frame.
Both have u/v value of 1.3w/m2 k
Both have NSAI cert
One uses kommerling extrusion from germany, the other was developed and is manufactured in the UK.
I suppose one is as good as the other, apart from 15yr guarantee.
Not sure if I can name these companys, but one is based in roscommon, the other seems to be nationwide.
I'm thinking that the gains from TG are minimal especially on an older house.

TG benefit is mainly sound tbh, unlikely to see a return from them assuming the DG are decent.

cpoh1

U values are a very difficult thing to measure exactly and I would take vendors numbers with a pinch of salt, the number of joints, sizing of glass etc. all mean that each window SHOULD have its own unique u value once manufactured.

I would ask each rep to give examples of houses in the area they have upgraded and take a look at them.

We have only just put in an order on replacement windows while we upgrade the gaff and spoke to a few people in the area whose windows we liked. In an older house that is fairly leaky its unlikely you wont see a massive difference between double and triple glazed windows.