A double, double glazing question.

[Barry Hayden]

Good morning.
We have a mix of aged double glazing in different rooms of our upstairs. Nearly all of which I’ve replaced the rubbers and hinges. Now they all close and seal, other things come in to question.
Firstly- why would a one glass unit, of 3 in the same window frame completely be covered in damp? It doesn’t appear that the unit has failed. The others have the usual damp only at the bottom edges, even if the glass is above this wet one (we dry clothes in the room)
My other question, and I did find the answer but for the life of me, I can’t find the details now. What is the best method of stopping water coming through one handle on another frame. The drain is clear on this unit, but it still leaks inward.
Hopefully someone can point me in the right direction.

 

[ronniecabers]

The condensation on one unit only may well mean it hasn't got either a ' Low e ' coating or filled with Argon gas . As both are for heat retention it could be the other units have one or the other and are staying warmer. I have certainly seen what you are experiencing happen before because of this

 

[Notch7]

The condensation on one unit only may well mean it hasn't got either a ' Low e ' coating or filled with Argon gas . As both are for heat retention it could be the other units have one or the other and are staying warmer. I have certainly seen what you are experiencing happen before because of this

Out of interest, have found replacing old non low e units and found it solves / reduces condensation issues

I’m getting condensation on some upvc windows, I’m pretty sure they pre date part L requirements in early 2000s (but are 24 or 28 units) so was thinking of replacing with soft coat, low e, warm edge and argon units.

Its on my list of energy saving improvements so might do it anyway.

 

[ronniecabers]

Replacing old non low e /Argon units with low e /Argon will certainly help. Did it on my own windows at home, still have cockspur handles on my windows so that puts an age on them lol, but there isn't nothing wrong with the frames themselves and it has reduced condensation in ' normal ' conditions