Concrete slabs play a crucial role in many structures. However, over time, voids can develop beneath them. These gaps in the supporting soil create serious risks. This article explains how you can identify and repair voids using polyurethane concrete foam filler.

Signs You Might Have a Void

How can you tell if voids exist beneath your concrete? Keep an eye out for a few key indicators:

• Cracks in the slab surface
• A hollow sound when you tap the concrete
• Sinking or sagging of the slab

If you notice any of these red flags, you must take action. Ignoring the issue will only allow it to get worse.

Using Concrete Foam Filler to Fix Voids

Luckily, repairing voids is usually a straightforward process. Polyurethane concrete foam filler offers an ideal solution in many cases. A qualified contractor injects this material into the gaps to fill them and stabilize the slab. Best of all, you can use the slab shortly after application.

Polyurethane vs. Cement Grout

Polyurethane foams provide significant benefits compared to traditional cement grouts for void filling:

• Foam conforms more precisely to cavity shapes and sizes
• Unlike cement, polyurethane will not shrink or settle over time

Concrete Foam Filler: A Smart Alternative to Geofoam Blocks

In situations where you need lightweight fill, polyurethane foam can serve as an alternative to geofoam blocks. Contractors sometimes use geofoam blocks when native soils are very soft or where buried utilities exist. However, polyurethane void fill foams offer these advantages:

• Foam conforms to void shapes more accurately than square blocks, thus providing greater stability once installed
• Foam requires lower shipping costs compared to bulky geofoam blocks (an expense that is usually passed along to the property owner)

Concrete Foam Filler: Your Key to Stable Slabs

In conclusion, concrete foam fillers play a vital role in repairing voids and stabilizing slabs. When soil issues threaten a structure, polyurethane foam often provides the fastest and most effective remedy. Therefore, if you suspect voids under your concrete, don't hesitate to explore this solution. 

Fill out this form or call 404-618-0438 for a contractor referral today!

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