What is a ‘blow-out’?

A blow-out’ is a break in the form, gen­er­al­ly due to the pres­sure from the liq­uid con­crete dur­ing the con­crete place­ment and/​or con­sol­i­da­tion. Fox Blocks ICFs are designed to main­tain a high safe­ty fac­tor of pres­sure from the liq­uid con­crete. Dam­aged forms or fail­ure to sup­port areas where forms have been cut leav­ing a large area of EPS between the web sup­ports may cause a blow-out. Over con­sol­i­da­tion may also cause a blow-out.

Fox Blocks rec­om­mends the Pre-Place­ment Check­list be reviewed for all wall assem­blies pri­or to the place­ment of con­crete, to find poten­tial prob­lem areas and install addi­tion­al strap­ping or sup­port to pre­vent blow-outs. Gen­er­al­ly, for an Fox Blocks form, the size of a blow-out may be lim­it­ed to the EPS between the webs, 6″ or 8″ wide by the height of one form. If a blow-out occurs, the con­crete pour moves to anoth­er area on the wall, the hole is patched by replac­ing the EPS, installing wood sup­port over the area, and then resum­ing the pour.

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19 Important Features of an Energy Efficient Building
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Keep Calm - That School Was Built With ICFs
Insu­lat­ed Con­crete Form wall sys­tems, Fox Blocks, are a way to cre­ate an extreme­ly safe struc­ture. When teach­ers and stu­dents return to an ICF school, they are pro­tect­ed against these ele­ments.
15 Building Products Designed to Withstand Natural Disasters
While many build­ings these days are designed with the same basic prin­ci­ples, there are times when excep­tions need to be made.
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What Additional Insulation Do You Need for an ICF Home?
Easy-to-install ICF wall sys­tems help cre­ate ener­gy-effi­cient, durable, dis­as­ter-resis­tant, and healthy homes. But do you need addi­tion­al wall insu­la­tion for ICF homes?
Can you build and pour concrete in cold weather?
Yes. The forms insu­late the con­crete and enhance the cur­ing process. The top of the forms, or exposed con­crete areas will need to be cov­ered, tem­porar­i­ly, with insu­la­tion to pre­vent the exposed con­crete from freez­ing. Fox Blocks projects can be con­struct­ed any time of the year, no delays for cold weath­er.
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The Foundation of Construction: A Guide to Building Code Foundation Requirements
Build to Resist Tornadoes: Storm Safe ICF Structures
Research by Texas Tech Wind Sci­ence and Engi­neer­ing Research Cen­ter has demon­strat­ed that ICF walls bet­ter pro­tect occu­pants of hous­es from wind­blown debris, than frame walls. Being hit by wind­blown debris is the most com­mon cause of injury dur­ing tor­na­does.
How to build a house foundation
How to Build a House Foundation: 7 Steps to get a Solid Foundation
What if my contractor doesn’t know how to build with it?
Fox Blocks offers the most com­pre­hen­sive installer train­ing in the indus­try. We can train your con­trac­tor or help you locate a trained installer in your area.