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Old 05-29-2014, 12:18 AM   #1
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Rafter tail ventilation question


I have exposed rafter tails. I live in AZ.

My plan is to lock out the 2x4 spacers between the tails and put in vents. Not sure what concept to use. Regardless, how do I install the ventilation baffles with no soffits?

If I'm understanding the design of ventilation baffles, it covers the top plate and allows air to move up the roof from the soffits. Yet, if I have no soffits, how can I attach the baffle to the top plate if the top plate will be occupied by my 2x4 spacer?

Does that make sense?

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Old 05-29-2014, 11:36 AM   #2
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Rafter tail ventilation question


Considered enclosing the whole fascia and soffit area and using vinyl or aluminum vented soffits?

Instead of removing the 2 X 4's you can use a 4" self feeding drill bit and install snap in round louvers.

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Old 05-29-2014, 11:57 AM   #3
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Rafter tail ventilation question


The vents go in the under side of the over hang. If there is blocking on top of top plate it might me a code violation to remove them and not put them back some place.
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Old 05-29-2014, 01:13 PM   #4
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Originally Posted by joecaption View Post
Considered enclosing the whole fascia and soffit area and using vinyl or aluminum vented soffits?

Instead of removing the 2 X 4's you can use a 4" self feeding drill bit and install snap in round louvers.
I could do the round holes, but again, the baffles require to be secured to the top plate for proper installation. I can't secure it to the top plate because the spacer is sitting on it.
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Old 05-29-2014, 02:54 PM   #5
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Rafter tail ventilation question


Another choice is to install Smart Vent.
Google it.
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Old 05-29-2014, 04:20 PM   #6
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Rafter tail ventilation question


I will look it up. Am I explaining my dilemma correctly? I could throw in circular vents in the spacers, but each only allow 2 in of air flow. Joke.
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Old 05-29-2014, 04:23 PM   #7
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Rafter tail ventilation question


I don't think the Smart vent is for my application. How does one keep their insulation away from their exposed rafter eave vents? That's my dilemma. I could drill holes in it, but the blown in cellulose would block it. The baffles won't work with insincerity occupies the top plate.
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Old 05-29-2014, 04:54 PM   #8
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Use this style baffle and hold it back to the inside edge of the top plate.
Why do you not think the Smart Vents would work?
Unless you cover up those tails your limited on what you can do.
A whole lot less mantaince if you close them up.
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Old 05-29-2014, 05:20 PM   #9
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Originally Posted by joecaption View Post
Use this style baffle and hold it back to the inside edge of the top plate.
Why do you not think the Smart Vents would work?
Unless you cover up those tails your limited on what you can do.
A whole lot less mantaince if you close them up.
I think I will just build a soffit. I didn't think it would work because according to their website, they control flooding water as well...
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Old 05-30-2014, 01:03 AM   #10
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Use rigid foamboard at wall perimeters. Much better insulating the wall top plates as they are house AC'd and attic air is hot, sometime moist. Cut the whole top-edge of blocks out, (not code required unless more than 2x4 rafter/2x6 CJ, check local AHJ); screen it, small trim over screen.

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Old 05-30-2014, 10:14 AM   #11
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Originally Posted by Gary in WA View Post
Use rigid foamboard at wall perimeters. Much better insulating the wall top plates as they are house AC'd and attic air is hot, sometime moist. Cut the whole top-edge of blocks out, (not code required unless more than 2x4 rafter/2x6 CJ, check local AHJ); screen it, small trim over screen.

Gary
Do you mean rip the block? Take about an inch off and re-block it but screen the part I ripped off?
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Old 05-30-2014, 11:26 PM   #12
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Yep, if the rafter ratio meets minimum code I gave. Pictures would help...

Gary

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