[raymate]

newbie question should I try and replace the rotten wood myself or get someone in to tackle this one:

I was going to pull of the rotten bit and do this myself, any tips?

 

[Ron6519]

The whole window sash needs to be removed to repair the rot.
And you're probably looking at some frame rot on the left side.
Wood rot is like an iceberg, you only see a small part of it.
Ron