spacing between rim joist vents
A low income weatherization program put floor insulation in my dad's house. After the fact I was informed we now needed more vents. I know the fomula and I come up with 4 and they say 7. The current vents are about 6-7 feet apart, house built 1953. Because of the floor joist, the vents will not be centered. With that some of the vents will be about 20 inches; apart. Will that spaceing compromise floor or house structure. If any thing I would allow 3-4 but not 7. The way the house is, because of addition, the venis would all be aded to two sides of the house. I am not interested in a vapor barrier. We live in mild weather in san jose CA I crawled under the house on a 98 degree day and the dirt was cold but dry and no moisture on baords. Not much rain in winter. If I would have had this information before hand I would not have allowed them to put the insulaiotn in the floor. Some advise just leave as is. Thank you Jude.
Last edited by jude morrison; 07-28-2011 at 12:02 PM.
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