On 09/05/2020 13:20, The Natural Philosopher wrote:
On 09/05/2020 11:56, ss wrote:
I have a area of rot on a window frame (image attached).
I hacve scraped it out and will let it dry for a few days then intend
to use wood rot hardener then fill with 2-part epoxy stuff.

Is this the best way to go or should I cut a section out and replace
the wood. Damaged area is approx 20cms long and approx 2cms at widest.

Other question that piece of the sill does that go through to the
interior of the frame? Not sure how these things are constructed.

https://imgur.com/BXRr3bd
No you are OK. scrape it out to good wood, fill with car body filler and
paint



Be brutal. Get all the soft and/or rotten timber out and flood it
with clear cuprinol. Leave for 7 days for the cuprinol to soak in
and dry before making any repairs.

Best done in hot, dry weather, like we had through most of April.