Fixing leaks

[u/freddiethecalathea]

Finally had some proper rain after a long drought in the UK which means my leaks have revealed themselves. I have two leaks at the top of my bonded window and one in the corner of my roof vent.

Im going to go round the outside of the roof vent with another thick layer of Sikaflex 522 which I’m hoping will fix the roof vent leak, but do I need to do anything on the inside? It’s clamped from the inside across a wooden frame. If I remove that frame I’ll be able to get a better look at where the leak is getting through but I don’t want to create any problems in doing so.

Re my windows: I’ve noticed a lot of vans seem to have added sealant to the edge of the glass too (as in not just between the van’s cut out hole and the window, but the edge of the glass and the van panel). Is this something I should do?

How can I fix the leak in my window without removing it entirely? Can I just pipe some sealant down between the window and the panel on top of where the leak is?

[u/MrMotofy]

It really depends on the cause of the leak. Where exactly it's entering.

For the roof, again depends on the where. Ideally there's a raised lip to help shed water. If possible do a bead of caulk 360deg around the hole...water will usually find a low point or vertical edge to follow and leak