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#1
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Insulating UNOCCUPIED Attics in Residences
I have always gone by the philosophy that
the overhead(roof) rafters should not be batted unless the attic will be fully sheet-rocked, climate-controlled and lived in, and only the attic floor(ceilings below) should be insulated. Am I correct? |
#2
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Insulating UNOCCUPIED Attics in Residences
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#3
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Insulating UNOCCUPIED Attics in Residences
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#4
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Insulating UNOCCUPIED Attics in Residences
Well, nowadays I'm seeing on TV, and in houses I've
visited, insulation between the rafters in, as I've stated, attic used only as storage(the Christmas tree, luggage, unused toys awaiting tag sale, etc). Even on 'THIS OLD HOUSE' in an episode featuring a 'Net Zero' energy project, the roof consists of no less than three layers of styrofoam insulation and vapor barriers, the final roof planking, another barrier, and finally, the shingles A total of 20" of insulation BELOW the shingles! So I guess techniques are changing. But I continue to recommend the old fashioned way - NO insulation under the rafters of an attic where only the Samsonite family, and Barbie & Ken, reside. |
#5
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Insulating UNOCCUPIED Attics in Residences
On Thu, 7 Feb 2019 19:46:11 -0800 (PST), wrote:
I have always gone by the philosophy that the overhead(roof) rafters should not be batted unless the attic will be fully sheet-rocked, climate-controlled and lived in, and only the attic floor(ceilings below) should be insulated. Am I correct? I think the crux of the issue is not really insulation - but rather ventilation ... is your "storage " area going to be well ventilated to the great outdoors - or sealed off from outside temperatures ? John T. --- news://freenews.netfront.net/ - complaints: --- |
#6
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Insulating UNOCCUPIED Attics in Residences
7:40 wrote:
"I think the crux of the issue is not really insulation - but rather ventilation ... is your "storage " area going to be well ventilated to the great outdoors - or sealed off from outside temperatures ? John T. " In a traditional unoccupied attic, the only thing the roof keeps out is the beating sun in summer, and precipitation and strong winds year round. Other than that, it is ventilated, around the edges where the eaves meet the attic deck, and optionally, via a ridge vent along the peak. That is why we insulate the attic deck(the ceilings of the highest rooms in the house). This should be common knowledge John. |
#8
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Insulating UNOCCUPIED Attics in Residences
On Friday, February 8, 2019 at 8:35:59 AM UTC-5, wrote:
7:40 wrote: "I think the crux of the issue is not really insulation - but rather ventilation ... is your "storage " area going to be well ventilated to the great outdoors - or sealed off from outside temperatures ? John T. " In a traditional unoccupied attic, the only thing the roof keeps out is the beating sun in summer, and precipitation and strong winds year round. Other than that, it is ventilated, around the edges where the eaves meet the attic deck, and optionally, via a ridge vent along the peak. That is why we insulate the attic deck(the ceilings of the highest rooms in the house). This should be common knowledge John. Agree. The OP doesn't say how the attic is ventilated. Without adequate ventilation, air won't move to equalize humidity levels between inside and out. Also, is there a vapor barrier on the insulation in the attic, facing the living space? Is he sure that all bath vents, dryer vents, etc are properly run outside and not into the attic? And regardless of all of the above, I would think there would be periods where the humidity level inside the attic will be much higher than outside. If it was humid outside at 65F and then at night the temp quickly drops to 35F, the humidity will go up until enough air moves to equalize it again. |
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