Filling large gaps in rotted windows

[shaun40]

Hi
I'm hoping I might be able to receive some advice on how best to fill the large gaps that have come about as a result of me preparing the windows/cill for painting. They had previously been filled with some type of filler but this looked a real mess so I removed it, along with some additional rotted wood, and the result is what you see in the photos. These windows by the way do not open, they are fixed frames holding in the glass.
How best now to fill these voids? Do I need now to pack it all out inside before trying to smooth a wood filler up flush to the frame?
Any advice on this would be much appreciated.
Thanks
Shaun

Untitled

• shaun40
• 25 Aug 2013
• 2

Untitled

• shaun40
• 25 Aug 2013
• 2

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[dann09]

I dont see the point of attempting to salvage something thats already a hopeless case.

No matter what effort and materials you waste on the frames and cill they will continue to deteriorate, and probably cause some internal fungal damage.

Replace with something better & safer ( you should have an escape opening window).