Boring Under Concrete Slab

Almost 20 years ago concrete construction investigated the effect of using a layer of loose uncompacted sand directly beneath a concrete slab and concluded that this practice contributed to more later age cracks and poorer joint performance here are the reasons not to use a sand layer.

Boring under concrete slab.

Even if you rent a machine to dig under concrete all these options are costly and take time. Not only is it fast 1ft minute but it bores underground without getting messy. In order to move the soundboard we need to run conduit under the slab from the current soundboard location to the new location about 20ft away. When breaking through a slab remember the flooring with have to be removed and replaced the interior of the home cleaned and possibly homeowners will have to move out while work.

With our handheld auger bit boring machine it s a cinch to pipe under concrete. If you are confronted with a sidewalk a 3 to 6 foot obstacle you can generally manually horizontal bore under the sidewalk using a garden hose and a piece of 1 2 inch steel pipe. Tunneling under a house is always more expensive than cutting concrete slabs. You re either going to make a mess of your beautiful concrete by trying to saw through it or you can hire an expensive contractor to bring out a big horizontal boring machine.

All the existing wiring for the soundboard mics speaker wire power controls etc come in through various conduits that run under the concrete slab of the sanctuary. Wish johno would confirm but i asked him one time what was the slab under this p w 3b jig bore aprx. The depth of the trench is important as a deeper trench will prevent the concrete from cracking while boring. When using the wet auger kit dig a trench 15 feet long.

Our supply line runs to the house through the yard. 50 year old galvenized pipe is failing and replacing it requires getting under over or around a 12 foot wide concrete patio. Difficult to maintain a flat level sand surface during concrete placement difficult to. After considering all costs consider the often cheaper option tunneling.

Horizontal boring or horizontal drilling. The line goes under the retaining wall that divides the lower west side of the yard from the upper. Time and money you don t have or want to spend. Boring underground has never been faster less expensive and more predictable.

The dry boring kit requires a 6 foot long trench 6 inches below the bottom of the concrete slab. Iirc he s got it on 3 of unenforced concrete with probably a dubious foundation and he said it stayed pretty level.