I plan to strip the old paint and putty with a heat gun. How do I protect the glass (single glaze) from cracking due to the heat? Is there a way of shielding the glass effectively? What's the beat way of doing this?
I used a heat gun with a guard on to strip all my sash windows. Didn't smash or crack a single pane. Was using it quite close as well. It was by far the best for removing the paint, wouldn't do it any other way.
I plan to strip the old paint and putty with a heat gun. How do I protect the glass (single glaze) from cracking due to the heat? Is there a way of shielding the glass effectively? What's the beat way of doing this?
Its not the glass you should worry about if you have never used a heat gun before, its whether your Household Insurance will cover you if anything goes wrong.
Using any sort of heat on old Sash windows can be fraught with danger,
I agree, don't use a heat gun next to the glass. You could try paint stripper, but they're nowhere near as powerful as they were pre 2010. (unless anyone has found one which is like Nitromors used to be?)
When we renovated our current house, the small-paned sash windows were so clarted up with years of paint in about 20 layers that we ended up removing the frames (we had to replace the cords anyway) and dipping them in a pit of caustic soda which we dug in the garden and lined with plastic. Then we power washed them and dried them gently. Perfect result - all paint removed and original detailing revealed!
Main problem was stopping the cat dipping its paws in the pit...
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