My good deed for yesterday was to cut out and remove the floor boards where the cats had been allowed to pee around the cat litter tray for many years.
[A previous good deed was to help take the cat pee soaked carpet down to the tip.]The multi tool with the vibrating saw blade from Aldi proved its worth in cutting through individual boards, although when the blade warmed up hot cat pee sawdust wasn't the most pleasant smell.
Now most (possibly all) of the smell seems to have gone along with the floor boards, but I can see where liquid (I assume cat pee) has trickled down between the floor boards and soaked into the joists in a couple of places.
We are not keen to start taking up yet more floor and cutting out and replacing the joists, so I was wondering if painting the joists with some kind of sealant such as a bitumen compound might seal any remaining smell into the joists.
With new boards, underlay and carpet on top there should be small chance for the smell to get through anyway but obviously we don't want to put everything new in then discover a few months down the line that the smell has come back.
Reports of success (or failure) from others who have had to tackle this problem would be useful.
Thanks
Dave R