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Let it Snow: Working with NUDURA ICFs in Cold Weather

by NUDURA Blogger | Nov 29, 2016

According to the Portland Cement Association, if concrete can achieve a compressive strength of at least 500 psi before freezing, the design strength will not be affected. To that end, concrete typically must be kept above 40° F for 24 hours to properly cure. Even in cold weather, concrete can be poured into NUDURA ICFs.

So, the question becomes, what is the definition of “cold?”

When the average temperature over a three-day period is below 40° F (4.5° C), concrete application is considered to be a cold weather pour. To ensure full compressive strength of the concrete is achieved in these conditions, concrete can be heated and the mixture can be altered accordingly. 

Where there’s cold weather, there’s often snow and ice. Builders who work in these extreme conditions can keep their jobs moving by taking these steps:

At a basic level, you will first need to cut a hole in the bottom of the wall the diameter of your forced air tube. Next, connect a piece of duct to this hole, which will allow you to force warm air through the cavity and cause the ice to melt. To expedite the process, it is best to cover the top of the wall with an air barrier to hold in the heat.

If you have further questions about how to navigate your ICF installation with cold weather and the challenges it brings, please click here to contact us or call 866-468-6299.

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