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Old 11-07-2011, 07:31 PM   #1
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Wall Insulation - Batt vs. Blown In


Which is better to use batt insulation in a wall vs. blowing insulation in?

I have 2 exterior walls, 1 wall plaster is removed and when closing back up the walls I'll be installing batt.

On the 2nd wall, the plaster is still up and I'm debating adding a day to my project to rip it out and install batt on that wall too.

Thoughts?

Thanks!
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Old 11-07-2011, 07:42 PM   #2
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Wall Insulation - Batt vs. Blown In


Compacted blown would be the best route. Placing batts in the open walls, will just allow air movement. You really need to read the info at the Building Science website.
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Old 11-07-2011, 09:29 PM   #3
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Wall Insulation - Batt vs. Blown In


Dense-packed, either cellulose or fiberglass, is far better. Figerglass batts are the worst insulation made, unless perfectly installed (a rarity) and then it is still not great. It's OK, tho.
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Old 11-07-2011, 10:22 PM   #4
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Wall Insulation - Batt vs. Blown In


Will you be caulking the stud/sheathing/plates joints before insulating?

Will you be air-sealing the drywall (ADA-- airtight drywall approach)?

Do you have any rigid foam board on the exterior?

Where are you located?

Gary
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Old 11-08-2011, 03:25 PM   #5
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Wall Insulation - Batt vs. Blown In


Quote:
Originally Posted by GBR in WA View Post
Will you be caulking the stud/sheathing/plates joints before insulating?
The studs/sheathing/plates are already up/in

Will you be air-sealing the drywall (ADA-- airtight drywall approach)?
don't know what air-sealing is...should i do this?


Do you have any rigid foam board on the exterior?
standard (1/2" or something) sheething then brick exterior


Where are you located?
Live in PA


Gary

Really appreciate the insight...
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Old 11-09-2011, 12:55 PM   #6
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Wall Insulation - Batt vs. Blown In


check out Air Crete..


http://airkrete.com/index.php
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Last edited by 1910NE; 11-09-2011 at 12:58 PM.
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Old 11-11-2011, 07:27 PM   #7
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Wall Insulation - Batt vs. Blown In


Quote:
Originally Posted by GBR in WA View Post
Will you be caulking the stud/sheathing/plates joints before insulating?

Will you be air-sealing the drywall (ADA-- airtight drywall approach)?

Do you have any rigid foam board on the exterior?

Where are you located?

Gary

I'm leaning towards blown in fiberglass insulation...any additional input?
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Old 11-11-2011, 07:39 PM   #8
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Wall Insulation - Batt vs. Blown In


You should caulk the studs/plates/sheathing to prevent air leaks: pp.21: http://www.engr.psu.edu/phrc/trainin...ngbarriers.pdf

ADA: http://www.buildingscience.com/docum...wall-approach/

Problem with sheathing on a brick wall and air-permeable insulation: http://www.greenbuildingadvisor.com/...moisture-walls

http://www.buildingscience.com/docum...n-brick-veneer


I'd use cellulose or ? other than f.g: http://www.nrc-cnrc.gc.ca/eng/ibp/ir...ling-heat.html

What are the odds, I was typing when you asked.... Lol.

Gary
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Clothes taking longer to dry?
Clean the dryer screen in HOT water if using fabric softener sheets.
They leave a residue that impedes air-flow, costing you money.
Clean the ducting in the last six months? 17,000 dryer fires annually!
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