Roof issues.

[Martin Brandom]

So, these lively strong winds a couple of months back left gaping holes in my old slate shed roof.
So I decided I'd reroof it with the added bonus of being able to lay felt underneath. All finished last week...
This week the rains have come, and I've noticed that on the one roofing joist that had lowered over the year, there isn't a good seal between the battens, the felt and the joist. This has led to a leak.
What can I do???

 

[Brigadier]

photo would be helpful

 

[^woody^]

What can I do???

Keep calm and self isolate

 

[conny]

Did you overlap the felt working from the gutter edge upwards?
Have you put a length of felt over the apex and overlapping the felt each side?
Can you trace exactly where the rain is getting through. Rain/water has a nasty habit of entering at one spot then travelling unseen to emerge at another spot.
If you locate exactly where it's getting in you will be more successful at repairing it, maybe with a little sealant or extra piece of felt.

 

[Martin Brandom]

It's the nail holes in this one sagged beam. So can't create a proper seal along it's length. Like I say, it's not until it was all finished that the rain started getting through, so I guess it will get worse over time.

 

[conny]

If possible lift the nail heads a bit and squirt a touch of sealant underneath before tapping back down.
If you can't lift them smear some sealant, or even Vaseline, over the nail head to try and form a protective barrier.

 

[Martin Brandom]

So, remove half the roof slates, lift the nails a tad, squirt in a bit of sealant, then reroof the newly reroofed roof?
Sounds like a lot of effort.

 

[conny]

When you replaced the slates did you stagger the rows and overlap them so the rain running off the bottom of one slate landed on the next slate down without dripping into the vertical gap between the slates?
If you want to solve the leak then you may have to at least raise/remove a few of them.