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quintegi
Registered Users
Posts:6
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| 01/04/2007 1:57 PM |
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| Just read the Builders Guide to Cold Climates by Joseph Lstiburek of Building Science Corporation and he recommends that on interior walls of ICF walls that a furring strip be applied the the ICF and the Gypsum Board/Drywall attached to the furring strips. This is news to me any other opinions |
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icfgal
Registered Users
Posts:29
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| 01/04/2007 4:42 PM |
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Not all ICF's are created equal...some are more equal than others. Some ICF's need to be furred out to create attachment points for bracing and finish materials. This is especially true of panel systems that you assemble on a job site. The plastic ties hold the panels together at the top and bottom but do not run the entire lenght hence the need for furring. I prefer a block system with the webbing completly embedded in the eps and I will only build with a block I can internally vibrate insuring concrete consolidation.
Hope this helps. |
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walltech
Registered Users
Posts:467
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| 01/04/2007 8:36 PM |
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That book most have been written with older systems in mind. Sure there are a few inferior systems yet today but this method is not applicable with today's best forms.
Dave |
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smartwall
Registered Users
Posts:33
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| 01/05/2007 7:39 AM |
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| I think that the reason for recommending furring strip attachments for interior sheetrock, is the fact that under certain conditions ICF walls will sweat. |
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James Eggert
Registered Users
Posts:994
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| 01/05/2007 9:22 AM |
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Sweat? I can't agree with this!
Sweating, or condensation is caused by temperature differences between products in an air environment! If an ICF wall is covered with say drywall, the air has no contact with the EPS foam so condensation does not occur. Now exposed interior ICF walls (may) develop condensation but then its because of excessive moisture already present in the air!
As far as I'm concerned, everyone should use a humidistat controlled dehumidifier in the basement at least the first year after construction. Helps balance the moisture content of everything in the basement. Above grade floors have a more natural air exchange from windows, doors, exhaust fans, etc. |
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Take Care
Jim
Design/Build/Consulting
"Not So Big" Design Proponent |
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DaveJackson6
Registered Users
Posts:30
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| 01/05/2007 9:59 AM |
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Jim,
I completely agree! "Sweat" is not an issue with the ICF block unless it was not aged properly at the manufacturer. When molding blocks, they come out of the press/mold dripping wet due to the infusion of steam during the injection and cooling processes. That moisture (steam) evaporates completely within just 24 hours. So if the block is aged properly, there should be no condensation between the ICF block and drywall. If this is happening, then some other condition exists that should be addressed.
Dave Jackson
Fox Blocks |
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Dave Jackson
Fox Blocks - The Clever ICF
Dave@FoxBlocks.com |
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