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Is Butyl Tape Needed When Installing MaxFan Roof Vent


Do you need Butle tape for install or just the sealant?


Expert Reply:

When installing the MaxxFan Roof Vent # MA00A04301K that you referenced you will want to use butyl tape on the vent edges in addition to the sealant that you will apply around the unit to cover up bolt holes and any other areas that might lead to a leak. I have attached a sample vent installation on a different model vent just so you can get a better idea of the process.

We do have the Roof Vent Installation Kit # 344270KITW available that includes a 10.1 oz bottle of sealant, a 60 foot roll of butyl tape, and the required hardware.

expert reply by:
Chris R

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Awesome thank you. I feel like i can breathe a little bit now.

Etrailer Expert
Reply from Chris R.

Great - I'm glad we could help! Breathing is extremely important.


Yeah, I forgot to use the dang Butyl tape. So, i have an vent adapter which is adhered to the van with 3M 5200 sealant. Then the fan flange is on top this is where i should have used the Butyle Tape. I then sealed it off with Decor Lap Sealant. Do i need to scrape this stuff off and start all over? haha

Etrailer Expert
Reply from Jacob H.

We highly recommend using Butyl tape BUT it is not the end of the world if you forgot it. It just helps to give you that extra seal for any water that might try to get in. If you've got a good layer of sealant around the perimeter and covering the screw heads then you should be fine. I would still do your normal checks after a heavy rain or snow to make sure you've got a good seal.

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