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Old 10-04-2013, 12:36 PM   #1
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How much NFVA for 10x10 Shed?


Hi Folks,

I'm a DIYer building a simple 10x10 shed, 8' high walls, 4/12 gable roof pitch, and 12" eaves. No overhang on the ends.

I had planned to put in soffit vents along with a ridge vent. Prior to doing some recent reading, I had no idea that it was important to properly size the venting. Seems obvious now!

I found calculations for the minimum NFA required. It's based on attic floor space. The result is a very small amount if venting required. I'm wondering if I can or should exceed that minimum NFVA amount? I'm looking or any suggestions for how much venting to add to this small shed.

Thanks,
Matt

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Old 10-04-2013, 02:00 PM   #2
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How much NFVA for 10x10 Shed?


Note that all code requirements establish minimum acceptable standards. The venting required in building codes is primarily for moisture control in the attic space and is not for heat control. You can always add more ventilation at your option. Keep in mind, that there is a relationship between the net free opening sizes of the high and low opening that should be maintained. The net free area of the high vent(s) (ridge) should be equal to or greater than the sum of the net free areas of all the lower vents (eaves).

Rick

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Old 10-12-2013, 12:00 PM   #3
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How much NFVA for 10x10 Shed?


+1 to Arkitexas.

You don't really need any given the lack of a conditioned space.

For the ease of install and more leakproof application, I would just throw in some gable end vents. It will breathe enough.
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Old 10-13-2013, 09:03 AM   #4
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How much NFVA for 10x10 Shed?


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Originally Posted by Windows on Wash View Post

You don't really need any given the lack of a conditioned space.

For the ease of install and more leakproof application, I would just throw in some gable end vents. It will breathe enough.
i agree. and they don't need to be very big at all. but since there will be no overhang, see that they are water shedding.
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