Take a stroll around an old park or neighborhood and the chances are high you’ll encounter some uneven concrete sidewalk slabs. This kind of settlement happens over time, after a significant event like an earthquake or flood, or when concrete is set on shifty foundations like shale or over natural moisture paths.
Uneven slabs can be time-consuming to fix if the contractors choose to demolish the slabs and set new concrete. To save money and time, applying spray foam underneath existing concrete slabs can make the surfaces even again without having to perform time-consuming operations and wasting the existing materials. Lifting with spray foam can add years of additional use to your concrete and make your driveway, walkway, or other concrete structure functional once more.
Contractors who perform this kind of work need spray foam equipment that’s specifically suited to lift concrete slabs. At Intech Equipment and Supply, we have the right concrete lifting spray foam equipment that you need to safely and effectively lift slabs.
Spray Foam Machines
Machines process and pressurize spray foam materials and present them at the right conditions in the spray foam gun. This allows them to form a chemical reaction and create spray foam for concrete lifting.
Many of our Graco and PMC machines can process both open-celled and closed-cell spray foam. However, lifting spray foam has its own unique needs that some proportioners process better than others. For example, Graco personally recommends two proportioners for concrete lifting– the Reactor series and Gusmer Hydraulic proportioner.
- The Reactor line of Graco proportioners offers a wide variety of turnkey systems that make it easy to get to work quickly. This product line comes in a regular and elite form to meet the demands of small to large concrete lifting jobs.
- The Gusmer® H-20/35 GH-2 hydraulic proportioner is a simple, durable machine that the company also recommends for raising concrete. It comes at a great value but still offers an impressive performance. Hydraulic machines are known for their power coupled with low maintenance, so it’s a great pick for busy contractors.
Spray Foam Guns
To mix the materials and send them underneath the concrete, you’ll need a gun that can properly mix the materials without frequent clogging, jamming, or malfunctions. Graco and PMC are the top manufacturers for spray foam guns that can send the materials underneath concrete. For this kind of job, you should only use mechanical purge guns because they prevent any material cross over.
- An unequivocal industry favorite is the PMC PX-7 Mechanical Purge Gun. Its robust design and mechanical purging capability make it ideal to apply lifting foam. This model incorporates a valving rod that mechanically purges the mixed material, eliminating the need for solvent flushing or air purges.
To insert spray foam underneath concrete, you’ll need a few specialized tools to help you access the areas underneath the concrete surface. You can easily find these products at your local hardware store or online.
- Hammer Drill
- A 3-4-foot drill bit, and a few extras in case you need replacements.
- 6 Mil Heavy Duty poly sheet to prevent concrete stains.
- An Injector
- Rubber mallet to hammer the injector into place.
- Wrench to tighten down the injector.
- A leveler to detect even the slightest changes in the concrete’s position.
- Quick set mortar mix to patch up holes.
- Standard Safety Equipment
Spray Foam Material
Not all spray foam is right for concrete slab lifting. When you shop for materials, you need to find a fast reacting foam that won’t stick to concrete. You also need the right density of spray foam that remains pliable enough so you can work with it as you raise individual slabs to be even with each other. It should also expand to 20-25 times its original volume to have the right “aggressiveness” to raise concrete.
After you purchase your equipment from Intech, you can find the right materials from various vendors. HMI is one company that specializes in manufacturing fresh concrete-lifting spray foam materials. They carry closed-cell spray foam, not the open-celled type that is used for insulation. Geolift is another brand that manufactures spray foam that can raise heavy slabs.
If you have any questions about what materials we recommend using with your current equipment, contact our customer service associates and we can recommend you our top picks for slab jacking contractors.
Spray Foam Equipment for Concrete Slab Lifting
At Intech Equipment and Supply, we carry dependable concrete slab lifting equipment to meet your contracting needs. Contact us to find out more about what we have in stock and what are the industry’s top picks for lifting concrete.