Prior to the 1960s, homes were built suspended in the air. In fact, back before slab technology was refined, most homes were elevated by pier and beam structures. Today, pier and beam foundations (sometimes called post and beam) aren’t as popular, due to the affordable concrete slab option. But you can still find pier and beam foundations used in certain parts of the country, especially in areas that receive a lot of rain or are prone to flooding.
If you’re building a home, there are a lot of factors to consider when choosing your foundation type. You’ll want to evaluate all of them to ensure an informed decision. Continue reading to learn the benefits and pitfalls of the pier and beam structure.
The pier and beam model has been around for millennia, ever since humankind has been stacking together logs and boards to support the most elementary of shelters. Of course, technology has evolved significantly in that time. Concrete slab foundations have risen to rank as the most preferred option for builders.
So what makes a pier and beam system worth installing in a modern home? Several factors, actually. To list a few:
Pier and beam foundations (sometimes called post and beam) elevate homes to protect them from flooding and moisture.
Between the home and the ground is a crawl space high enough to crawl through (hence, the name) allowing utilities including plumbing and electrical wiring/units to be installed and easily accessed if issues should occur.
In fact, this is probably the biggest advantage pier and beam foundations have over slab foundations. If there are any plumbing problems in the latter, for example, it could require having to break open the concrete floor to get at any damaged pipes. Generally the former has fewer foundational problems than slab structures and can be less expensive to repair.
The suspension provided by a pier and beam foundation also helps with expansive soil pitfalls. Shrink-and-swell soils are more likely to negatively affect concrete slab foundations than they are pier and beam foundations.
There’s also an extra bit of insulation from the air under the home, saving on energy costs. Some people prefer the feel of the wood platform over a concrete floor. While this might attract termites, they’re actually easier to detect thanks to the crawl space.
Of course, no foundation type is going to bring benefits at every level. Read on to learn more about the cons of the pier and beam foundation style.
The most significant disadvantage of pier and beam foundations, when compared to slab structures, is the cost. While the foundations of small sheds and buildings may be cheaper with a pier and beam structure, elevating your home is almost always more expensive than letting it sit directly on the ground.
Disadvantages to the pier and beam setup, which could be potential roadblocks when buying or selling a home, include:
Sagging, creaking and bouncy floors
Rain accumulation and moisture problems
Mildew, mold, and rotting wood
Bugs and rodents in the crawl space
Poor design further adds to the list of problems, especially improper spacing between the pier and beams and shim failures due to inferior materials. And this is more common than you may think. Not every home builder is an expert contractor or engineer (or simply doing the right math, for that matter).
Fortunately, repairing these issues is often easier and cheaper than slab problems. This is due in part to the ease of access granted by pier and beam foundations. Whereas an issue with a slab foundation leaves little room for moveability or modular repairs.
In fact, finding certain deep or horizontal cracks in a slab foundation may be a terminal diagnosis for the slab and will require extensive steps for a solution.
Your builder or foundation expert will approach your new foundation with a long list of environmental influences. External factors that can affect the integrity of your foundation often include:
Landscaping and water drainage
Longevity of building materials
Whether you go with a concrete slab or the older pier and beam foundation method, the tricky element most likely to influence the foundation build is water. Flooding can significantly damage concrete, alter the soil makeup, and cause wood to rot.
If you decide on a pier and beam foundation either out of choice or necessity, bear in mind that no structure is perfect. Fortunately, most pier and beam foundational issues are easily remedied when spotted early.
For many homeowners and developers, the pros may very well outweigh the cons. It all depends on the setting and budget. However, determining the best solution requires professionals who can guarantee quality and know what’s best for your property’s lifespan.
With over 25,000 foundation repairs over the last 25 years, we understand the scope and complexities surrounding pier and beam foundations. Our engineers get right down to business in evaluating the circumstances of a property and provide practical solutions and honest communication our clients will appreciate.
Perma-Pier provides foundation repair solutions throughout the state, including areas of Houston, Austin, San Antonio, & Dallas-Fort Worth. Schedule your no-charge evaluation or learn more about pier and beam foundations by reaching out to one of our offices today.