Having Blown In Insulation Added To My Attic. Question About Installing Gable Vent F - Insulation - Page 2 - DIY Chatroom Home Improvement Forum
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Old 04-03-2015, 08:12 PM   #16
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your call obviously, but nothing good can come of having cellulose in your soffit cavity.
The cellulose goes in like wind driven snow and will most likely push your baffle tight to the deck (wear it should be) but gap at the bottom will be exposed. No time like the present to prevent it.
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Old 04-04-2015, 06:49 AM   #17
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http://www.homedepot.com/p/GAF-Cobra...8000/202052410

  • I believe this is your ridge vent. This product has 18" of NFVA per foot. So you would be looking for 9" NFVA per ft. minimum on your 2 opposing soffits. I personally prefer a continuous soffit that will have a specified NFVA as opposed to individual vents that usually will require an educated guess. I used a 30% NFVA factor on your 3" rounds to come up with about 2" of NFVA. A more accurate way to know would be to measure the total length of slots and multiply by opening width. If individual vents are the plan we should be around 6 x 12" spaced every 2 ft in the center of your rafter span.
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Old 04-04-2015, 06:32 PM   #18
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http://www.diychatroom.com/f103/gabl...e-vent-254610/

Ideally; would warrant continuous venting, close to the fascia board for better air-flow pressure (less rain, etc.), pp. 617; http://books.google.com/books?id=Z8a...0vents&f=false

You need 5 (five) of those circular vents PER FOOT of soffit;http://www.ventmastersstore.com/3-ro...ed-vent-white/

The tape measure is covering the stated NFVA on the vent pictured....

Gary
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