How To Fix Erosion Under Concrete

How to fill voids under a concrete slab.

How to fix erosion under concrete.

Shrub and tree roots excel in preventing erosion way better than grass roots. Properly installed gutters and downspouts will effectively channel rainwater away from building foundations thereby minimizing erosion under concrete slab foundations. To repair you ll need a form. This is a means of filling voids underneath concrete slabs by injecting pumping filler materials into the defective areas.

Without the right support concrete will crack sink and cease to be the sturdy solid surface you can count on. Then back fill a little bit with soil. Erosion under concrete is serious whether it s your foundation driveway patio or sidewalk that s affected. Fill the hole with concrete.

1 855 752 2522 uses an expanding polymer foam injected under the concrete that fills voids and if necessary raises you re settled concrete back to the proper grade. Mulching makes use of organic materials to do just this while adding nutrients back into the soil. Smooth it out on the outside. It s imperative to fix erosion under concrete as soon as possible but first you need to know what to look for.

There are several conventional and alternative void filling materials which can be employed to achieve a similar effect. Recommendations for installing downspouts state that they should channel water 5 to 10 feet from the base of the building. Concrete is a very heavy material in addition to being unable to generate any upward pressure on the slab the added burden on the soil often speeds settling. Manure compost newspaper grass clippings and other organic materials can be good for this purpose.

Connect a hose to a slabjacking pump then run the hose to the holes leading to the void. Mix the concrete to a thicker consistency. These simple methods can help you revitalize your soil repair damaged areas and prevent soil erosion in the future. So the concrete is buried by a few inches.

If your sidewalk hasn t heaved by now then the addition of new concrete below it isn t going to change anything. Drill at least four holes through the slab at a point that s centered on the void beneath. Concrete doesn t expand in the cold you re probably thinking of frost heave which is where moisture in the soil freezes and expands disturbing whatever s above it. Bury an aluminum flashing or redwood or other suitable material a couple of inches deep and about an inch from the concrete edge allowing it to extend above the bottom edge of the concrete approximately an inch.

Use a drill equipped with a masonry bit to bore. Use an ax handle or whatever and pack it up in there. It looks like the problem is just that it was poured on top of the ground instead of being dug out a few inches and then being back filled after.