Window Sill and Frame Rot Repair/Bodge - Best Options?

[RealPolitik]

Have a softwood window which has rotted away at the back of the sill, and on the lower inch or so of two uprights - I would like to get it patched up so it will look presentable for a year or so until all the house windows are replaced. How would you approach this - chisel it flat and screw a batten across, filling the uprights and any gaps? Or would two-part epoxy work? A uPVC sill won’t work as the lost wood was largely the raised strip behind the actual sill.

Is it too far gone for a joiner to want to take on? Any advice welcome!

 

[Diver Fred]

To far gone!

Bodge, then.
When the rain stops and the timber drys out brush the loose rotten wood away. Use copious amounts of wood hardener on the bare timber. Buy a length of architrave or pencil topped skirting Cut that to fit between the walls. Chop out the rotten timber on the uprights level with the glass. Heavy bead of (glazing) silicon sealer on the flat side of the skirting, press that against the glass and the uprights of the window frame with the bottom close or touching the cill. The silicon should squeeze out the top edge of the skirting, clean that up to leave a small bead finish. Finish the bottom edge with a bead of silicon between skirting and cill.

 

[RealPolitik]

Thanks, that makes sense. I was considering new wood into the uprights and filling, but I think that’s going to be too involved given the state of it.