Without being too technical and just in case anybody else has this issue.
Bungalow, condensing boiler in the loft, flue over the bathroom window. The
height of the flue is well within regulations.
Fitting the boiler in a different location would have resulted in long
unsightly runs for the condensate drainage pipe.
I've noticed for quite a while that the PVC window ledge has rusty yellow
stains on it. I incorrectly put this down to the acidic droplets or whatever
from the flue gasses removing the white from the PVC window ledge.
Cleaning with ordinary household cleaner was futile.
Today I had a go with meths and a Brillo Pad. The stains came straight off
leaving the PVC like new.
On Friday, 19 May 2017 18:34:14 UTC+1, Mr Pounder Esquire wrote:
uPVC is actually very porous.
There is some sort of varnish put on to prevent staining.
I 'spect you have now rubbed this off and it will stain easily.
You can get speacial stuff to reseal them.
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