Replacing a Roof Vent

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May 4th, 2020 7:05 pm

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May 3rd, 2020 9:05 pm

SizzleChest [OP]: Deal Addict; Jan 22, 2008; 3996 posts; 2473 upvotes

May 3rd, 2020 9:05 pm

Replacing a Roof Vent

I have a powered vent fan on my roof that is dead. I am wanting to replace it with a Ventilation Maximum 301-12 passive vent. The hole in the roof once the powered fan is removed is about 16.5" and round-ish The passive vent only needs a 12"x12" square hole and has 19.5" diameter flashing so I'm only covering the hole with an extra 3" (1.5" on either side) which I'm pretty sure is not safe. Is it possible to add on to the flashing to get extra coverage?

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May 4th, 2020 6:53 pm

fdl: Deal Fanatic; Dec 5, 2009; 5656 posts; 3411 upvotes

May 4th, 2020 6:53 pm

Can you not replace the wood in that section and reapply shingles ? Maybe a couple of feet wide.

May 4th, 2020 7:05 pm

User452441: Sr. Member; Oct 22, 2016; 631 posts; 537 upvotes; Comox Valley

May 4th, 2020 7:05 pm

As fdl says, replace the wood in that section. Or depending how old you roof is, and if it might have to be redone in 5 years, just do a temporary fix to it.
Such as, add extra support to this area from attic space, if you have enough head room.

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