insulated concrete forms

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Posted by: from Port Aux Basques
4/5/2012 at 8:47:54 PM

I am building a single storey house 40 ft x 30 ft with a full basement. I plan to use the insulated concrete form and was wondering if the forms add bearing strength to the wall.

The concrete foundation will be 8ft high along the 40ft front and 15ft back each side. The rest of the sides and the back will be 4 ft high.

If I use the insulated concrete forms can I have 6 inches of concrete instead of 8?

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Date/Time4/5/2012 at 11:43:47 PM

Hi Eric, this is a question that can only be answered by your local permit office and inspector. The ICF manufacturer will likely have specs and possibly engineering reports & drawings that you can use when talking to the building permit department. They are going to want stamped engineers drawings before approving anything.

I doubt that +/- 4" of EPS will add anything to the structure. The benefits of ICFs are speed, added insulation value, and air / water tight construction.

Good Luck with it!

Jim Kuzma

Kettleby Handyman Services

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Date/Time4/15/2012 at 11:38:43 AM

Hi Eric,

We deal with engineers and architects on regular basis and they will not allow anything less then 8" on a bellow grade application of ICF. Above grade, you can use the 6".

In my opinion, the insulation does not add any strength to your wall. If you need a stronger wall, you can add more rebar and have better MPA concrete installed. Depending on your load requirement, complexity of your construction, site, etc., the engineer will specify what you will require.

When you get your plans, you must specify that you will be using ICF. This will become part of your plans.

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