One of the few companies which installs all major pier types and will recommend the pier that best suits your foundation needs.
Foundation Repair Services for DFW and Surrounding Areas
Expert in Slab foundation systems
Williamson Foundation Repair installs all 3 primary types of piers:
- Double-Walled Steel Piers driven to rock
- High-Strength Concrete Pilings driven to rock
- Drilled Concrete Pier
- USUALLY LEAST EXPENSIVE
- NEARLY UNLIMITED DEPTH
- ADJUSTABLE BY EVERY COMPANY IN BUSINESS
- MOST PRONE TO FAILURE IF NOT INSTALLED PROPERLY
- NOT SUITABLE FOR HIGH WATER FLOW AREAS
- MOST LIKELY TO CREATE NEW SHEETROCK CRACKS
The concrete pressed piling is by far the most prevalent repair pier on the market. Many companies give them brand names to make them sound exclusive, but they are all essentially the same.The concrete piling consists of pre-cast high-strength concrete cylinders which are driven to refusal by hydraulic rams. They are fast, create far less mess than a drilled pier, are infinitely adjustable by any company in the industry, and are by far the most cost-effective method used.However, if not installed to complete refusal, these piers can slip over time. Also, like steel piers, the concrete pressed piling relies on the weight of the building to press the pilings. This creates movement in the structure which can create new Sheetrock and brick cracks in some instances.
Concrete pressed pilings are pre-cast high-strength concrete cylinders driven to refusal by hydraulic rams. These are installed directly under the grade beams. A cap block is installed atop the cylinders and, after the structure is raised into position, two more cylinders are added along with steel shims which are hammered in to prevent slippage.
- NO PRESSURE ON THE HOUSE
- CAN BE INSTALLED UNDER LIGHT STRUCTURES
- LIMITED IN DEPTH (8-11 FEET)
- MESSIEST AND MOST TIME CONSUMING METHOD
- FAILED PIERS MEANS START OVER
Drilled piers are the oldest type of piers used. Holes and pier shafts are created using various types of auger equipment, then steel rebar is added and fresh concrete is poured into these shafts. After the concrete cures (about a week), the foundation is lifted and supported on these piers.While drilled piers are very beneficial in some applications, they are limited in depth (usually 8-11 feet deep), are very messy to install, take at least 7 days to complete (unless concrete accelerators are used), and require larger equipment in the yard. Also, if a pier fails for any reason the entire process has to start fro scratch.
The graphic above is an illustration of a dual-shaft pier, which is the most commonly used drilled pier. Other drilled piers will utilize a larger diameter single pier shaft design.
- ULTIMATE INTER-LOCKING POWER
- UNLIMITED DEPTH
- THE MOST EXPENSIVE METHOD
- OLD-STYLE PIERS TEND TO BEND AND BREAK
- LIMITED ADJUST ABILITY BY OTHER COMPANIES
These old-style steel piers utilize a single pipe installed outside the footprint of the home with a steel bracket transferring the load to the pipe. The problem with this design is that it creates a bending moment stress on the pipe just below the bracket. We have seen dozens of examples of broken piers which have allowed the house to drop again.
The double-walled steel pier we utilize is installed from directly under the grade beam of the home. No brackets are used and no bending moment is created. Also, the pier employs a smaller pipe inside the outer pipe which gives tremendous resistance to any bending and rusting fatigue