Thank you, very helpful.
When the verge was replaced they lifted the tiles and replaced the wet/rotten battens.
I did use a RICS surveyor to help find the cause, who suggested first trying to retrofit a cavity tray, which I will do, but wanted to rule out other possible causes first...
Hello, I have a 1970s house which the previous owners renovated a decade ago, and I have had water pouring in under a suspended cavity wall for the past two winters. I have had multiple roofers and surveyors look at it without success, so after ideas as to what I could do next.
The water only...