We’ve had a bit of Weather over the past few days. Not as bad as it can get up here, but winds gusting into the 50+mph range and heavy rain with it. By Monday morning we had one slate off, one slate lifting and a small puddle in one of the bedrooms.
Pete came over yesterday to investigate. He’d noticed the slate that came off was loose when he drove past a few days previously and had made a mental note to come and sort it out, but it’s not letting any water in, so it’s not hugely urgent. The puddle was a bit more of a worry. Mick, by this time, had spoken to some of his work colleagues who’d said that everything in their garages was soaking with condensation as a result of the unseasonably warm weather, so I put that to Pete as an option, who said it might be, or it might be coming in through the chimney somewhere. Mick phoned him yesterday night with some more information about what moisture he found where and they came up with a plan of action to get the framing finished ASAP so the heating could go in, dry out the air in the house and then put the insulation back in and see if it happened again.
Except this morning I went down to feed the sheep and found bone-dry walls apart from three very long dribble marks all the way from above the tanking down to the ledge the gable sits on and a small puddle on the ledge. My theory is that the chimney has a leak somewhere, it’s run down the wall and pooled on the ledge, only spilling over the ledge for the first time when we had some serious rain, but the presence of water behind the insulation has caused condensation to form – i.e. the condensation is a symptom rather than the problem. I’ve updated Pete and when we get a gap in the weather and he’s free, he’ll go up and inspect the chimney. Quite a few of the houses around here have some porous stones used in their construction, so if there’s nothing obvious on the stack, it may just be a case of painting it with a clear sealant.