condensation

[asc]

A friend of mine is buying a flat and asked me to have a look. The survey noted localised moisture ingress in roof. I had a look in the loft space. The property is four in a block, 2 up, 2 down, with separate roofs facing at 90 degrees to each other, so a semi detached type roof with a ridge leading to 2 hip ridges. There is a separation wall inside separating the roof space from the other upstairs property. Property is 1935 probably with original slate/felt roof in Scotland - with sarking.
Of the three roof elevations, one is dry, one has a couple of small wet/weeping patches about the size or your hand. The third elevation was soaked from top to bottom side to side, two days after it had last rained, with the surface wet and dripping - not just moist.
She had a roofer attend today to survey it and he said there was nothing obviously wrong with the outside surface of the roof, and says it is likely to be condensation.
As no one is staying in the house and it is unheated, is it likely this level of moisture could be condensation?
If the ridge was leaking the ridge and the hip ridge to that face would both need to be leaking badly to cover the entire elevation I think?
Any help/guidance/opinions/pointers would be appreciated as she has to make a decision very quickly

 

[ree]

How can we help you if you post such a confusing text?

Where are the pics that would save all the tricky attempts at visualising whats in the post - esp. as you are in a hurry to make a decision, & with so much money at stake, yet you dont even take time out to post pics.

 

[JohnD]

start here


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