Have an extension with felt roof. We removed the guttering and the wooden board behind it. Noticed that the they have put joist, which is partly rotting.
However, I am not sure if they have done the job properly. As they have put the joist on top of bricks and lintel. Should they have put a barrier between the concrete lintel and the joist?. Replacing the joist is going to be hard, as they have built a flat roof ontop of it. So have to remove the joist and replace in section.
What sort of barrier should be using between the lintel and supporting joist?
However, I am not sure if they have done the job properly. As they have put the joist on top of bricks and lintel. Should they have put a barrier between the concrete lintel and the joist?. Replacing the joist is going to be hard, as they have built a flat roof ontop of it. So have to remove the joist and replace in section.
What sort of barrier should be using between the lintel and supporting joist?