The garden shed has been leaking for some time - in fact I bought the materials to fix it about two years ago, but hadn't got round to replacing the roofing felt until the last couple of days.
On removing the old felt I found that one corner of the roof had rotted - the pic above shows the affected part of the roof from above. I patched the corner up as well as I could then secured the new felt over the roof. Hopefully it'll keep the shed going for a while longer
