There is a technical committee who strives to make most terms within the foundation building and repair industry universal. This team looks at Spray Polyurethane in particular and came up with a list of technical service to the Spray Polyurethane.

A Sneak Peak of A – B Glossary:
A-SIDE: (A-Component) One component of a two component system. For polyurethane foam and coat-ings the isocyanate component. (See ISOCYANATE)

ABAA: See Air Barrier Association of America.

ABSOLUTE HUMIDITY: The actual concentration of water vapor in air. May be expressed in units of kPa, grains of moisture per pound of dry air, pounds of moisture per pound of dry air, or as a partial pressure as inches of mercury (in. Hg).

AC-377 / ACCEPTANCE CRITERIA 377: The standard to which a specific formulation of SPF is evaluated by ICC-ES (International Code Council Evaluation Service) in order to issue an Evaluation Report which de-scribes the foam’s compliance with building code requirements.

ACCELERATOR: A chemical additive to coating or polyurethane foam systems used in relatively small amounts to increase the speed of the reaction or decrease the time required to cure or dry.

ACRYLIC COATING: A coating system based on an acrylic resin. Generally, a “water based” coating

For a better understanding of this glossary, kindly download the below PDF link to a full review of the Glossary:

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A Primer on Polyurethane Concrete Raising

Polyurethane concrete raising combines the technique of slabjacking or mudjacking with the use of eco-friendly materials to correct uneven concrete surfaces. Traditionally, contractors would inject a mixture of soil, cement, or mud into the concrete which would push it from underneath. While this is still done today, We at Foundation Technology have switched to using polyurethane foam because of the benefits that it provides to our clients.

Reasons for Raising Concrete

Concrete surfaces go through natural wear and tear over time. Additionally, they are susceptible to what is known as settlement, or when the foundation of the soil surface dries up, shrinks, or consolidates, thereby creating a void. It’s when the concrete slab settles into this void that it can be prone to cracking or breaking.

What Is Polyurethane Foam?

Polyurethane foam is a high-density material that can expand to fill up spaces and cavities. To repair uneven concrete surfaces, this quality of polyurethane foam is precisely what’s needed to lift uneven concrete slabs back up. Applying this method and material eliminates the need to demolish the concrete slab only to replace it with a new one, which is more costly and definitely more time-consuming.

Benefits of Polyurethane Concrete Raising

Since a complete concrete replacement can take anywhere from a few days to several weeks, this raises the risk of injury and inconvenience, especially when performed in a busy area. With the use of polyurethane foam to raise the concrete, however, the sidewalk or foundation slab can be fixed in as fast as a few minutes. This is because polyurethane foam does not need as many holes in the concrete before it can be injected into the void.

Lightweight and environmentally friendly, polyurethane is a popular polymer with numerous commercial and industrial applications. Cost-effective with a speedy installation process, using polyurethane for concrete raising will require the least amount of effort and accomplish the same results from that of concrete replacement in the least amount of time.

If you’re dealing with uneven concrete surfaces on your home or commercial property, contact us to schedule a free inspection, and get a detailed analysis within a day!

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Concrete settlement is caused by changes in the moisture content and density of the soils beneath a concrete slab. Whether it be poorly compacted fill soils, or erosion, these changes create voids beneath the slab which eventually cause the concrete to crack, break and settle.

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