Fill Void Under Concrete Steps

Drill at least four holes through the slab at a point that s centered on the void beneath.

Fill void under concrete steps.

Geo polymer void filling is the best method we currently have for void filling but it cannot affect deeper layers of un compacted fill so you are left with supporting and densifying through polymer injection. While this method of slab jacking is cost effective there are major drawbacks to opting for this type of repair. Holes should be no less than six inches away from the edge of the concrete. Use a hoe or fabricate a pushing stick and stuff the concrete into the crevice.

I would use an 8 diameter sono tube cut to 30 which is your frost line fill it with quickcrete concrete mix. It seems to me that i need to remove the gravel and fill the void with dirt and pack it in as tight as i can get it. Smooth it out on the outside. 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.

The foam will fill up the parts of the concrete that are uneven and will raise it to the proper height. Should it be removed or do i add the void filling material directly on top of the gravel. A sono tube is a cardboard tube available at home depot. Once it hardens use some soil around the low spots and slope it away from the steps packing it down firmly.

Connect a hose to a slabjacking pump then run the hose to the holes leading to the void. Once the holes have been set the geolift is injected in between the concrete and the dirt. The grass will eventually fill in. Use a drill equipped.

The first step is to drill holes in the problem concrete. How to fill voids under a concrete slab step 1. 2 there is currently a few inches of gravel under the porch. A sand cement grout can be used to fill voids under concrete slabs.

Quickcrete concrete mix is also available at home depot. You might need two bags. 1 what material should i use to fill the void under the porch. This mix of sand cement and water is pumped through holes drilled to fill up the voids.

Immediate replacement of settled concrete or concrete with voids is not a good choice as settling is not yet complete.