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Crawl Space Excavation Can Turn Your Crawlspace Into a Basement

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Crawl Space Excavation in PA Can Help Turn Your Crawlspace Into a Basement

Crawlspace excavation is tricky business so here are some steps and procedures you can follow to get the job done. A crawl space dig out can turn your tiny crawlspace into a basement.

***Make Sure You Check Out the End of This Article to get a FREE ESTIMATE on Your Crawlspace Excavation!****


Locate a space in an outside wall of your crawl space that you can safely enter the new basement with a temporary or permanent set of steps.

The opening in the wall should be large enough to accommodate at least a 36-inch door, preferably making the area for the steps at least 48-inches wide.

One note of warning at this point:

If your soil is sandy or gravel and or may be full of water at least part of the year do not consider this procedure, it is very dangerous and you may damage or lose your house.

  • Before you dig the hole for your outside exit, please build a header of sufficient size to hold the floor of the home where you will be removing the old foundation.

You need to excavate to a depth that will accommodate a four-inch concrete slab and still have at least 7-foot, 6-inches of clearance under your floor joist. It is entirely possible that you will have 48 inches of soil to remove. The deeper you go the more hazardous the work, this point is important and cannot be stressed often enough.


crawl space excavation in PA

A crawl space excavation that was done in PA

You must not excavate any closer than 24 inches away from the existing foundation.

You can remove the soil sufficiently to work along the wall without removing the entire area you wish to change.

When you get the soil removed to the depth you wish, pour a footer that is eight inches thick and 16 inches wide.

The footer should be below the bottom of the new slab so it is a good idea to dig the area for the footer below the level you remove for the floor area.

When your block is to the level of the bottom of the old foundation wall you need to pour a four-inch thick concrete slab on top of the wall and over to the outside existing wall.

Before pouring your “Cap” you must fill between the block and soil that is under the old foundation with fill sand or “Pea-gravel.” Assuming that you probably have some kind of support under the center section of the floor system, you will have to provide support for the beam that is presently supporting the floor while excavate for a new footer for a steel post that will hold the floor of your new space.

The footer for this should be eight inches thick and 24 inches square.

You will need to level the floor area for your new slab and install four inches of perforated plastic pipe draining to a sub pit with an automatic sub pump that dispenses the water to the outside at least five to ten feet away from the foundation of the home. I like to use “Pea-gravel” for fill under the slab but you can you fill sand also.

  • You can build your stairwell to the outside in a similar fashion but you need to cover it with a steel “pre-fab” unit such as a “BILCO.”

They have provisions for locking and if you take care of them, they will last for many years.

The floor plan of your home may allow for a stairway to the basement from inside, this is great for some folks like and exterior entrance also.

Basement Solutions offers free estimates at you home with no obligation. For those who want a Crawl Space Excavation in NJ, MD, DE, PA РPlease call our office at 610-495-9111 to set up and appointment. If you are reading this off-site you can contract us at our website, www.basements911.com.

REMEMBER TO ALWAYS ASK THE CONTRACTOR IF THEY HAVE A LICENSE!

At Basement Solutions, WE DRY HARDER!