Hi Martin,

Thanks - I should have mentioned that there is a converted upper storey above the workshop, which already has double glazing, insulation etc. When and if the weather clears up I'll have a poke about the exterior walls, as thinking about it there must have been some damp proofing done at the time of the conversion - I'm guessing a stone walled property would have to have had the "injection" type damp course if it has one. The workshop itself is nice and dry if a little musty smelling, but that may have been due to lack of heating/occupation before I bought it (I think the whole property was vacant for over a year). Certainly the roof/ceiling timbers in the workshop look OK with no dry/wet rot or worm evidence and the wall's interiors are dry.

Cheers


Chris