Concrete void repair is a much more cost-effective solution than concrete leveling or replacement. EPS foam and concrete form tubes were installed to create the substructure and void fill for a unique waterfall feature for a residential pool. Concrete will also sink when supporting soil is washed away, leaving voids beneath the slab. This is to keep the fill material level underneath your slab to be as even as possible. Voids are created when concrete is partially supported by base soils or through the use of anchors or rebar to foundation walls or through the use of Sonotubes. As this concrete slurry fills the void underneath the concrete, it gradually lifts the slab. If you build a form flush with the outside edge, put alot of water in your cement to make it flow to fill out the void. This product was perfect for the void area under my front walkway and for filling a 10 foot long void by 6 inches high under a driveway slab. Drill at least four holes through the slab at a point that's centered on the void beneath. ANSWER: Filling in under your steps is an important step to prevent not only pests, but also seepage into your foundation through small cracks or openings that may be hidden from view. A void can also occur under a concrete patio, porch or driveway. The first step is to drill holes in the problem concrete. Also sent 5# of coffee grounds down the hole, and it didn't deter anything. This process of raising concrete results in a repair which, when cured, is impervious to water. Here are 3 reasons why a layer of crushed stone is important to the life of your concrete: Cap the holes with grout and allow them to dry. Lift and Level provides void filling services. Learn why you need to fix the problem to prevent water from collecting in the void and causing further shifting. 1-855-752-2522 I wouldn't want them to get stuck under there if I pour concrete; that would not be good news at all. Florida home - new construction - concrete block on mono slab. Concrete slabs settle due to voids or unstable soil. This typically occurs next to a sidewalk or walkway leading up to a home. This year I tried used kitty litter, then dirt. The first step is to chip out the brick above the foundation blocks to create holes into which steel channels will be inserted. Without the bi-product of heat, FillFoam is a safe and fast way to fill voids and cavities quickly and with limited access. CRC Geotech uses an Engineered Cementitious Slurry or a Hydrophobic Geotechnical Polyurethane Foam to raise or level concrete slabs and fill the voids beneath them. Heavy rains washed out about an 18" by 48" by 9" deep area of soil/sand from underneath the slab/footing on the front corner of the home. As the soil settles or is carried away by other means a gap opens up between the soil and the bottom of the concrete slab resulting in a loss of support. FILLFOAM™ IS A PRE-EXPANDED OPEN CELL FOAM FORMULATED WITH IDEAL CHARACTERISTICS FOR ANY VOID FILLING APPLICATIONS. keep filling and compacting until the void is full. The consistency and structural competency of the . A cracked bottom slab creates an uneven surface that can pose a safety risk. Polyurethane foam injection is an effective way to raise, level, or lift concrete in lieu of replacing the existing slab. Void space varies from 24" to 6". You may not want yours that thin :) But, I've also done this to my patio, where it meets the house, and it works great. What would be the proper method of replacing this soil/sand other than just shoving it back underneath. Under screened in porch converted to a all season room, so it has the concrete floor of a screened porch, but the walls and windows of a house. There's a wide ugly gap between my concrete outdoor patio slab and the slab my house is built on. After a quick investigation we believe that water has entered the gap between the patio and the foundation. Once you have the void completely filled, landscape around the patio to retain the material you've installed. You can find us at 117 Douglasbank Way SE, Calgary, AB T2Z 1W4, Canada. PUMPED AT FULL VOLUME, FILLFOAM DOES NOT LOSE VOLUME WHEN PUMPED IN CONFINEMENT. If you see a void opening up under your concrete slabs give the concrete raising and leveling professionals a call we will get you taken care of. Concrete is an amazing material, but it has an Achilles heel. Without the right support, concrete will crack, sink and cease to be the sturdy, solid surface you can count on. Rear patio towards the house has an area that no longer has any base supporting it, is there a fill that can be added to help support the slab or is this something a . If you get crushed aggregate under it, then you will have trouble getting the cement to fill the voids between the aggregate. You can make the effect less obvious by taking a small amount of the dust produced while drilling the holes and adding it to the grout mix. The instructions and videos supplied were very informative. Plus, the rounded contours of the dry material make AquaBlok highly "flowable," allowing for it to readily fill void spaces. We achieved 90% void fill and even lift the porch up 2" to level it back out. What is a void under a road? When you include the pounds of foam required, the size of the project, additional voids, weather and access to the work site, the average cost of lifting and leveling your concrete is between $7.00 and $12.00 per pound of polyurethane foam. If you have any questions on void fill and concrete slab lifting procedures or any injection related applications, please contact our team of qualified SealBoss representatives to schedule an on site consultation & full injection systems training. Filling the porch cavity with stone or concrete block might be an option but it would take consider fill to raise the porch floor to the appropriate level. Jun 20, 2019. The slab could be for an entire home, it might be an exterior patio slab, a front porch slab, a driveway, etc. First, small holes are drilled through the area to be filled, then the foam is injected under the slab, filling the void and lifting the slab back to a level position. Connect a hose to a slabjacking pump, then run the hose to the holes leading to the void. The obvious signs of a void can be seen. It ran out like water, and filled every void in the chimney cap when it dried. The concrete jacking process concludes with capping the holes drilled through the slab once the slab reaches the desired height and is verified as level. After slab jacking is used to fill voids from erosion under concrete, it is really important to correct drainage problems to direct water away from the affected area. Mudjacking is eco-friendly, cures in 24 to 48-hours, and typically costs 25% to 50% less than concrete replacement. Erosion Causes. Fill the void evenly by switching the hose to other holes. I ordered 2 foam kits to fill voids under concrete. If you think there might be a void under your concrete slab, contact Mr. Level today to request a free quote. you can . Despite the best intentions of your "non-specialist" advisers, they are flat out wrong. Poly Lift USA provides the best concrete lifting, leveling, and stabilization services in Florida, Georgia, and Texas. Filling voids under concrete with PolyPier is a permanent solution for your uneven, sinking concrete. What is a void under a road? The first step is to drill holes in the problem concrete. Eliminate Trip Hazards, Fill Voids, Stabilize Concrete. A little bit of moisture might help compact things as you work. Filling a Cavity Under a Slab. A void is that space that is located between a slab of concrete and the ground. Click to see full answer. The gap is about 42"L x 3 1/4"W. What's the best way to fill this gap? The process of void filling and raising a concrete slab is the same as traditional mudjacking. 4.1/5 (6,585 Views . Filling hollows under a concrete floor is done through a process called slabjacking. You will sometimes notice a void when you walk on the concrete, and you can feel it give under your feet. Mix the fill material in a wheelbarrow, using a spade. The foam will fill up the parts of the concrete that are uneven and will raise it to the proper height. You should never leave depressed areas open for airing out, but should fill them above grade to avoid moisture intrusion, in the first place. Fill out a form and we'll get back to you soon to set up an appointment to come inspect and quote any foundation and drainage problems. Connect a hose to a slabjacking pump, then run the hose to the holes leading to the void. Concrete leveling is also known as foam jacking, slab jacking or mudjacking. If the void is due to consolidation of the backfill, properly filling it may require repeated re-filling over a number of years until the backfill stops consolidating. While the materials used for void filling are designed to not wash away, poor drainage can continue to wash out the underlying soils below the void filling material.