Still chasing the damp...

So, it seemed that I had water coming in from the left, the right and along the back wall.  This had caused some timbers to rot, some had even turned to mush it was that bad.  In the corners the floor was also very wet and soft in places.  I now have a section of awning rail off on each side at the back as I suspect that at least some of the water is coming in there so I now have to cover it up with a tarp.

In order to trace the sources I have had to remove a fair bit of wall board and some good timber.  I wanted to chase it back to good dry wood before putting in any new.  In the left corner this meant removing the bottom frame timber for the toilet hatch as well as a timber in the base of the wall.  Around two feet of vertical framework has come out from both the side and rear walls.  It's a similar story on the right hand side too.  Fortunately all the wall board I have removed is unseen so I can just replace it with plain ply, much cheaper!

After removing the rotten timber I started digging around on the floor with a wood chisel to see what state it was in, quite bad was the answer!  In this picture there is already a new part of framework for the toilet hatch as I wanted to make sure it was sealed while I worked elsewhere.

So I decided that I needed to cut out a corner of the top piece of the floor sandwich so I could replace it with some new 6mm marine ply.  Only the ply was rotten with the timbers underneath being wet but firm.  After cutting back it looked like this.

I left it like that to dry for a few days then cut a patch from some marine ply and glued and screwed it in place using the PU glue I had bought for the aborted floor delamination repair.

It was the same story with the right hand corner.  Cut it back to good firm ply then glue and screw a patch.

I then set about making some replacement framework and finding out where the water was entering along the back wall.  More next time.

Simon.