I have installed upvc frames into new stone mullions. I am not familiar with the detailed internal construction of the frames but I have water leakage from the frames onto the internal faces of the mullions causing damp patches internally. Anyone ever installed this type of frame into stone surrounds ? Are there any sites which show how upvc windows are constructed showing the carriage of water through the frame and its disposal.
Tks
I think you're overcomplicating things. If the window frame is sealed to the surrounding stone there should be no way for it to leak, and it's no different fitting them into a stone surround than other types.. Other than that you'll probably find holes drilled from inside the bottom rail of the frame to the front face of the frame, to conduct out any pooled water from there?
Certainly there's no generic answer to your question as windows produced by different manufacturers will all be different.
David
If the new frames are on the outside (rather than rebated into the opening) the seal has to be 100%, and installers often glue an angled fillet over the join to deflect water away. If that hasn't been done, I'd rake out the join and re-apply the silicone because there isn't any other likely source for the leak, unless of course the stone itself was leaking before the new frames.
Many tks for the advice. I think the external pointing is is porous (material supplied by the stone mullion maker) so 1st I'm going to damproof the joints. I have found the upvc doors have no external drip outlet on the bottom sill so thats an obvious one. Ruddy nightmare though.
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