My allotment shed roof is leaking. It is a chipboard panel roof covered with roofing felt. The roofing felt has split and some has blown off. The rain has penetrated the chipboard, so that is probably a right off. Water is not running down the walls, but chipboard is not very resistant to any water.
Covering a roof with roofing felt needs a calm day and a warm day helps a lot. On a cold day the felt is prone to crack. I have decided to wait until the spring to repair the roof, so I've covered the dodgy felt with a tarpaulin. There are bound to be some winter storms; storm Barbara is already forecast for later this week. I hope the tarp survives until I'm ready to repair the roof. I suspect I will need some plywood to make the roof sound before the new felt goes on.