Pier and beam foundations lift your home approximately 24 inches above the ground, creating a crawl space beneath your house, rather than sitting directly on the soil. Concrete or brick piers are driven into the ground to act as anchors, while wood or steel beams run horizontally across them to support the weight of the home. Although slab and basement foundations are more common in Kansas, pier and beam foundations are a familiar sight in many of the state’s older neighborhoods. Since Kansas’s clay-heavy soil tends to swell after heavy rain and shrink back down in dry conditions, this design requires regular maintenance.
How Does a Pier and Beam Foundation Work?
The concrete columns are positioned at calculated distances based on your home’s weight and layout. Each column extends downward through the soft surface soil until it reaches a dense layer capable of bearing substantial weight. Beams are then secured across the tops of these columns to link them into a connected grid. Your home’s floor framework attaches to these beams, channeling all the structural weight downward, and spreads the load across multiple columns so no single point carries too much pressure.
Ideal Conditions for Pier and Beam Foundations
If your building site has sloped or uneven terrain, this foundation adapts easily since columns can vary in height. Flood-prone properties gain protection because the raised design keeps structures above the level of standing water. Areas with expansive soil also benefit since the system tolerates ground movement better than solid concrete slabs.
Pros & Cons of Pier and Beam Foundations
Pier and beam foundations offer unique benefits but also come with some challenges worth considering.
Advantages:
- Cost less to build because they need less concrete and simpler equipment
- Repairs are easier since you can access pipes and wires through the crawl space without breaking concrete
Disadvantages:
- Floors feel cold because outside air travels through the gaps below, increasing heating bills, though crawl space encapsulation with a vapor barrier can help regulate temperature
- Moisture builds up without proper ventilation, creating mold and rotting the wood supports
