I hope this is the most relevant section I am posting this question in.
I am going to buy a property in South Wales, probably Glamorgan, Carmarthenshire, Brecon, Pembrokeshire and usually go for a brick and block cavity wall and concrete tile type property.
There are a couple of properties I like the look of that are built with Welsh stone and slate roof.
Do any of you know if they are built with a cavity or a just 1 thick stone layer?
Are they harder to keep warm in the cold weather and are they susceptible to damp on the internal walls?