Rain water will spill out of overwhelmed gutters and can cause problems with penetrating damp.
Blocked or unsuitable guttering systems can lead to severe damp on the internal walls and aid dry rot as well as cause plaster to fall away and mould to grow as well as being unsightly.
It is always worth asking for a qualified surveyor to check the source of water ingress, to ensure you treat the right issue. Contact us for a remedial survey.