Circular porthole window and condensation

Gazelle1985

We recently bought a 1930s house with a porthole circular window by the front door. Now that the weather is getting colder, the window is misting up with condensation overnight. We do all the right things in terms of keeping condensation to a minimum in the house (i.e. don’t dry clothes indoors, lids on pans, extractor fan and windows open when cooking, heating house sufficiently) but as there is no radiator near the window it’s inevitable that’ll condensation will form.

Unfortunately because it’s a round window, there’s no proper windowsill, so the condensation is running off the window and dripping down the wall, running the paintwork (and probably the wall…). I wipe it every morning, but it drips before I can get to it!

Is there any solution to this? Only thing I can think of is to put some kind of block up to stop the water running down the wall, but that’s not ideal either as it’ll then just sit in the window itself.

Doozergirl

I presume it's single glazed?

Changing it for double glazing is the only thing that will stop it from happening at all.

Gazelle1985

It's actually already double glazed!

Fire_Fox

You might try redoing the draught proofing (flexible sealant type?) and/ or use the plastic film temporary 'glazing' over whole area (stop warm air contacting cold surface).