Sliding sash style upvc

[Oz07]

Are there any decent makes of sash windows in upvc with good u values? All that I've seen look too chunky. I would wonder how good the window performs with seals as well not having as much compression?

Edited 23 hours ago by Oz07

[Mr Punter]

I have used the "Rose" range in a couple of properties.  They are pretty good lookilikies for trad timber.

[Oz07]

Yeh just had a look. They seem good. Thin bars, butt joints etc. 1.2 u value as well. What's the pricing like compared to timber?

[Mr Punter]

I think similar or more expensive, depending on the range.  Roseview are based on standard upvc profiles from Rehau and do lots of extra customisation and finishing.  Their top range is almost indistinguishable from timber.

[Iceverge]

Sliding sash looks pretty but is the draftiest window you can buy. 

 

I was in a new build of some neighbors, 0.15 walls floor and roof, compact foot print, wet plaster and plenty of airtight tape and MVHR. 

 

And sliding sash windows........

 

You could feel the cold breeze on the back of your neck sitting in the kitchen.