We had a new roof put onto our kitchen extension because water marks were appearing on the ceiling. For a year, this seemed to stop any further water coming through. in the past week or so more water has been coming through and has actually caused rips in the paper covering the ceiling and also you can see a grid of where the water seems to be running down the joists - quite extensive and worrying especially with more rain to come.
We are trying to get hold of the roof people as it is under guarantee, but I think we need to address the potential problems being caused with wet joists as this seems to be getting worse each day with more wet patches and more worryingly is now going underneath one of the upstairs bedrooms.
Does anyone know what I should have looked at in the first instance? I don't think the roofers do internal stuff so may not be much help. I feel I will need to call someone else out and quickly as I don't want some serious damage to occur - I've not had to deal with this kind of issue before.