What do I do with this space?

Discuss plumbing related issues here - pex, drains, etc.
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trulysimple
Posts: 1
Joined: Sat Feb 02, 2019 6:51 pm

What do I do with this space?

Post by trulysimple » Sat Feb 02, 2019 6:53 pm

Just put in a tankless water heater.

I have a storm collar on the exhaust vent but there is still a gap around the exhaust vent goes through the roof flashing.

what do I do with that space? What can I fill in there? Is it just high temp silicone? or something else?



here's a bad picture: Image


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