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above-ground ICF's

Last Post 02 Jun 2010 02:10 PM by linelmarhao. 6 Replies.

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jimdolan

New Member

Posts:2

31 Jan 2008 12:10 PM
Has anyone experience with using ICF waffle style pattern, above ground? I have a Springfield MO project we are preparing a proposal on that the owner asked for my opinion on continuing the ICF's to the gables. (single story) The area is in tornado alley and he's looking for additional protection. For instance, can the mud be placed in one pour? or will the pressure be too great. We will use metal floor joists which I would like to tie into the pour, sheath and use as a working platform as we pour. I deck with 1-1/8" ply so the weight is pretty substantial. Would I have to crib the joists or would the ICF's bear the weight of the joists, decking and scaffolding? The owner wants hardi-board siding to resemble clapboarding. Does the ICF foam act as a sufficient vapor barrier to prevent moisture accumulation. I would appreciate any help Jim

bill gilman User is Offline

New Member

Posts:3

31 Jan 2008 02:34 PM
I am building in Charity Mo area, Used vertical slip in system by TIF and mfg by ACH in KCMO, Went with 8 inch nominal wall 2.5 icf inside and outside, very easy to use, pumped 9 foot tall walls in 3 passes wirh 7 sack 1/2 gravel and heavy reinforcement schedule. made steel bucks with insulated break. Did it myself with some help. Pour went with no problem and followed mfg direction on bracing. TIF said can pour 24 foot vertical. no blowouts with 9 foot and the 1/2 and 5/8 bar schedule provided very heavy reinforcement for resistance to tornado, it can support a ledger and joist. myself I am using sips for second floor with steel floor joist . Looked into steel stech skin with concrete for the second floor and gave it up because of cost. AAA concrete pumping was very easy to work with. Hope that helps.

Alton

Veteran Member

Posts:2164

31 Jan 2008 02:59 PM
Jimdolan, You may need to check with the Hardie company about whether you need a vapor barrier or rain screen. In conversations at the trade shows, Hardie reps have suggested to me that their siding could use a space behind it so that it will dry out after rains. The answer you get may depend upon which rep you talk to. In other words, your mileage may vary.

Residential Designer & Construction Technology Consultant -- E-mail: Alton at Auburn dot Edu Use email format with @ and period . 334 826-3979

walltech

Basic Member

Posts:390

01 Feb 2008 07:41 AM
Cement board is proving to be a bad choice of exterior sidings with out a drainage plain. Of coarse this is much less relevant on an ICF due to lack of cellulose materials behind it. But one has to wonder what its longevity is, if it holds moisture in which it is proving to do. Dave

woulfcc

Basic Member

Posts:147

01 Feb 2008 07:52 PM
Posted By jimdolan on 01/31/2008 12:10 PM Has anyone experience with using ICF waffle style pattern, above ground? I have a Springfield MO project we are preparing a proposal on that the owner asked for my opinion on continuing the ICF's to the gables. (single story) The area is in tornado alley and he's looking for additional protection. For instance, can the mud be placed in one pour? or will the pressure be too great. We will use metal floor joists which I would like to tie into the pour, sheath and use as a working platform as we pour. I deck with 1-1/8" ply so the weight is pretty substantial. Would I have to crib the joists or would the ICF's bear the weight of the joists, decking and scaffolding? The owner wants hardi-board siding to resemble clapboarding. Does the ICF foam act as a sufficient vapor barrier to prevent moisture accumulation. I would appreciate any help Jim 1 Yes , I have used waffle above ground, Didn't like it. 2 Gable pours with the wall are not to hard if you pour at a 41/2" slump and internally vibrate correctly. 3 Pouring a deck wall and Gable all at once? I have done it and it is faster but not some thing I would recommend for the novelist icf stacker. If your talking about the basement and 1st floor walls and gable all at once NO I would not try that one. Others have talked about the vapor barrier and will let that one lay. Hope that helps,

Changing How the World BUILDS!<br>Green , Done , Easy<br>Woulf c.c. of Wisconsin

dmaceld

Veteran Member

Posts:1465
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01 Feb 2008 08:59 PM
Posted By jimdolan on 01/31/2008 12:10 PM The owner wants hardi-board siding to resemble clapboarding. Does the ICF foam act as a sufficient vapor barrier to prevent moisture accumulation. I would appreciate any help Jim I will be using Hardi Plank with 8" exposure to match the reinforced sections of the webs. I plan to blind nail it with the nail heads on the surface of the plank. That will create a slight gap between it the next plank up allowing for air movement behind the plank. I'm in a low rainfall region, ~15"/yr, so heavy rains aren't a problem. Whatever you do, don't caulk the crack between planks.

Even a retired engineer can build a house successfully w/ GBT help!

linelmarhao User is Offline

New Member

Posts:17

02 Jun 2010 02:10 PM
I used Polystell wafel gid form for 14 years. in NC and SC I have done several building with insert metal floorjoysts into forms. I have a lot of experience with this method. I am available for travel if you need some help with a reasonable fee. Liviu