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Old 04-14-2011, 11:09 AM   #1
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attic ventilation


Hi all,

Last summer I had insulation sprayed into my attic to the tune of R38, along with the recommended baffles to circulate air over the top of the insulation via the soffit. There were only six baffles put in which doesn't seem like enough for a 1700 sq ft home. My question is that enough baffles to circulate air to my ridge vent? If not can I open the soffet vents and shove new baffles up through the batts into the attic? There are also gable vents, do these need to be blocked in order to increase proper flow?

Thanks!

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Old 04-14-2011, 04:19 PM   #2
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attic ventilation


What kind of insulation?

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Old 04-14-2011, 04:33 PM   #3
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Originally Posted by mulherin31 View Post
Hi all,

Last summer I had insulation sprayed into my attic to the tune of R38, along with the recommended baffles to circulate air over the top of the insulation via the soffit. There were only six baffles put in which doesn't seem like enough for a 1700 sq ft home. My question is that enough baffles to circulate air to my ridge vent? If not can I open the soffet vents and shove new baffles up through the batts into the attic? There are also gable vents, do these need to be blocked in order to increase proper flow?

Thanks!
The more intake (soffits) the better.
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Old 04-14-2011, 05:00 PM   #4
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attic ventilation


The insulation is blown fiberglass I'm pretty sure. I agree the more baffles the better, my question for you guys would be, can I open the soffit vents and punch through the batts with a baffle from the outside? If I were to attempt to install new baffles from the inside I would compact the insulation and essentially ruin the blown insulation effect. What do you think?

Thanks!
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Old 04-14-2011, 05:08 PM   #5
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attic ventilation


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Originally Posted by mulherin31 View Post
The insulation is blown fiberglass I'm pretty sure. I agree the more baffles the better, my question for you guys would be, can I open the soffit vents and punch through the batts with a baffle from the outside? If I were to attempt to install new baffles from the inside I would compact the insulation and essentially ruin the blown insulation effect. What do you think?

Thanks!
If the soffit vents are large enough to poke the baffle through, I don't see why it's not worth a try. Can't say for sure. Leave the gable vent open.
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Old 04-14-2011, 05:44 PM   #6
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attic ventilation


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Originally Posted by mulherin31 View Post
The insulation is blown fiberglass I'm pretty sure. I agree the more baffles the better, my question for you guys would be, can I open the soffit vents and punch through the batts with a baffle from the outside? If I were to attempt to install new baffles from the inside I would compact the insulation and essentially ruin the blown insulation effect. What do you think?

Thanks!
That really depends on the type of baffle you use. If you use the styrofoam type, most likely it will adversely impact the rigidity of the baffle. Also, baffles are intended to be stapled onto the roof sheathing/rafters, not just put in place.

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