I have a timber sunroom attached to the back of my house. Its about 40years old and the wood in some areas mainly around windows where putty has fell out and been left by previous owners has become wet and rotten. This has extended beyond the window frame into the surrounding woodwork. I have a couple of weeks holidays coming up and am keen to tackle the job myself. It looks like replacement of wooden beads holding windows in place and supporting woodworking around them plus about half a dozen floor boards. The mostly dmaged wall is stud with MDF as outside and inside walls painted 'badly' I will post pics tommorrow to give you a better idea but I am thinking of replacing rotten stud work, floorboards, weatherboarding the outside and replacing beading/putty as required oh and a repaint too. My query is does anyone have experience doing this? I'm a beginner but keen to get stuck in? I reckon I can chop out most of the rotten stuff and replace it but what with? Would treated pine be ok for a stud wall/ replacement wood and the floorboards too? Also what is the best way to weatherboard the outside? All help gratefully received.