Has anyone done secondary perspex double glazing?

[GudrunBrangwen]

I'm about to order some of this and hoping for some tips or reviews before I spend £600...for a bay window.

Is it worth it? Do you notice a difference?

We have very old sash windows and they rattle a lot in the winter - already got heavy interlined curtains but thinking this will make a big difference, or hoping it will, anyway!

Thanks in advance.

yes, it cuts the heat loss a lot, and if attached to the frame (not the casements or sashes) it will block the draughts too. If attached to the sashes or casements, you can still open the windows for ventilation. It has little effect on noise, which benefits from the extra weight and rigidity of a sheet of glass.

It is not quite as clear as glass, and it will get dirty. There may be a way of cleaning it that doesn't either scratch the surface or leave watermarks, but I don't know how.

If the glass is obscure, or if you have net curtains, you will not notice it.

Yes they do work, as we noticed big difference when we took ours down. We also had brush strips put into the sash windows to help reduce the draughts. You will also notice, after a while, quite a lot of dust/dirt and dead insects between the perspex and the glass (they still get in somehow). We used to take ours down in summer so we could open the windows.

Yes we used them in our G2 listed very drafty, cold house. They were brilliant. Only pain was storing them all somewhere safe in the summer.

Im pretty sure we didnt pay £600 for one window. We used Magnaglaze.

Oh brill - thanks ever so much for the replies.

I was going to use magnaglaze then I saw another company called plastics 365 and their perspex is 4mm instead of 3mm and they are about £450 for the same bay (it's four separate sash windows, all large, which is why it's so much).

I think the difference being that 365 don't pre-attach the tape to the perspex for you iyswim? Not quite sure.

I'm really glad that they seem to work though. Will definitely be doing it. It's one of our coldest windows - the rest are relatively small, when I get round to it, and should cost less.

I was hoping to do the brushes too but not sure where to get them from. I had some fitted to a flat once when I was poor and single, as part of a scheme. They were really effective.

the stuff you want is like fur. It allows sashes to slide. I have the metal-backed stuff that can be pinned or fits in slots, the sticky stuff needs clean, or preferably fresh, paint.

www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p3984.m570.l1313.TR0.TRC0.H0.Xpile+draught+strip.TRS0&_nkw=pile+draught+strip&_sacat=0

Thanks a lot - will go with the metal version as our paintwork is less than perfect.

The first house that we bought had this installed on some windows (particularly a large bay at the front). From memory, the panels were hinged so must have been attached to the (wooden) frames. Seemed to work well, not sure how old the panels were when we bought the house.

Are you thinking of draughtproofing the original windows or the secondary glazing? I thought that if you put up secondary glazing you are meant to take down draughtproofing on the original windows to allow some ventilation in the 'gap' and prevent rotting due to condensation. Apologies if I am misunderstanding the conversation.

I like the idea of hinged panels! I was wondering about storage tbh, though will probably just leave them in place in the summer.

Charleston, thank you - I was hoping to add perspex glazing to the original windows using magnetic strips, but then someone suggested brushes on the outside as well, and tbh I didn't think about whether the two ideas were compatible or not.

Good point, hopefully someone might be able to answer the question.

you can put pile draughtproof on the vertical sliding surfaces, but not on the horizontal meeting parts as it will get pushed off.

A dual screw will hold them together and stop rattling