What is XPile? The FRP marine piling built to last 50 years
What is XPile™? XPile™ is a fiber reinforced polymer marine piling that replaces steel, concrete, and treated timber in docks, piers, marinas, and bulkheads. It does not rot, rust, or corrode, and it is immune to marine borers. Built for the Texas and Louisiana Gulf Coast, XPile™ carries a 50-year design life and is sold exclusively through American Pole & Timber and Building Products Plus in Houston, Texas.
Key Takeaways
- XPile™ is an FRP marine piling made from fiber reinforced polymer, used in place of steel, concrete, and treated wood.
- It weighs about one-quarter of a comparable steel or concrete pile, which is the source of its strength-to-weight advantage.
- It is immune to marine borers and produces zero electrolysis, so it does not corrode dock hardware or fasteners.
- It carries a 50-year design life with little to no maintenance over the life of the structure.
- Available in seven diameters from 3.5 inches to 14 inches, cut and spliced on-site with standard tools.
▶ Watch: How XPile™ works. See how XPile™ is installed and why it holds up in saltwater, in under five minutes.
What is XPile™ and what is it made of?
XPile™ is a marine piling built from fiber reinforced polymer, a composite of glass fiber and resin pulled into a solid, structural section. Where a wood pile relies on cellulose and a steel pile relies on coated metal, XPile™ relies on a glass-to-resin matrix that water, salt, and marine organisms cannot break down.
The result is a round hollow piling that behaves like a structural member but carries none of the failure modes that shorten the life of traditional materials in saltwater. For a contractor working a saltwater or brackish site, that changes what the foundation of the structure can be expected to do over time.
Where steel corrodes, XPile™ holds
Steel rusts. XPile™ does not. In a marine environment, that one difference decides how long the foundation lasts.
Each traditional piling material has a known weakness in saltwater service. The table below shows where XPile™ sits against them.
| Material | Main weakness in saltwater | Typical maintenance | XPile™ difference |
|---|---|---|---|
| Treated timber | Marine borers, rot | Wraps, retreatment | No cellulose, immune to borers |
| Steel | Corrosion, electrolysis | Coatings, cathodic protection | Zero electrolysis, no corrosion |
| Concrete | Spalling, stress cracks | Patching, inspection | Holds structural properties over time |
| XPile™ (FRP) | None of the above | Little to none | 50-year design life |
Why does XPile™ weigh so much less than steel or concrete?
XPile™ is roughly one-quarter the weight of a comparable steel or concrete pile. A 12-inch XPile™ weighs about 16.6 pounds per foot. That weight difference is where the strength-to-weight advantage comes from, and it carries straight through to how a crew handles the material on-site.
Lighter pilings mean smaller equipment, leaner crews, and lower mobilization costs. Depending on the diameter, a crew can hand-stand the pilings into position rather than running heavy plant all day just to move material. On a tight or remote Gulf Coast site, that can be the difference between a one-day mobilization and a multi-day one.
Does XPile™ resist marine borers and corrosion?
Yes. In saltwater and brackish water, two things commonly end the life of a piling: marine borers and electrolysis. XPile™ is immune to both. There is no organic material for shipworms or Limnoria to feed on, so borers have nothing to attack.
XPile™ also produces zero electrolysis. That means no galvanic corrosion on dock hardware, fasteners, or vessels moored alongside the structure. With steel and concrete, electrolysis is an ongoing concern that often calls for coatings or cathodic protection. With XPile™, it is simply not part of the equation. The material also performs across the full range of soil conditions, including sandy loam, clay, silt, and acid sulfates.
What sizes does XPile™ come in?
XPile™ is available in seven standard diameters, from 3.5 inches up to 14 inches, so it can be specified for everything from a residential dock to a commercial pier or boardwalk. The table below lists the standard outer dimensions and approximate weights.
| Outer dimension | Wall thickness | Approx. weight (lb/ft) |
|---|---|---|
| 3-1/2 in | 0.24 in | 2.10 |
| 6 in | 0.31 in | 4.97 |
| 7 in | 0.39 in | 7.10 |
| 9-1/16 in | 0.38 in | 9.07 |
| 11-1/2 in | 0.37 in | 11.46 |
| 11-27/32 in | 0.53 in | 16.56 |
| 14 in | 0.53 in | 19.82 |
Need a length that does not match what is on-hand? XPile™ cuts and splices on-site with standard tools. One person with a standard grinder handles the cut. There is no heavy sawing and no complex rigging, so a crew can adapt to field conditions and keep moving.
Where is XPile™ used on the Gulf Coast?
XPile™ is purpose-built for the conditions along the Texas and Louisiana Gulf Coast, where corrosion, marine borers, and severe weather shorten the life of traditional piling materials. Common applications include docks, marinas, piers, boardwalks, and bridge foundations.
For a homeowner building a private dock, XPile™ means building it once and not thinking about the pilings again. For a marine contractor bidding a commercial marina or public pier, the weight savings and 50-year design life change the total cost of ownership across the life of the structure. To see how XPile™ fits alongside our other options, our guide on building a dock on the Gulf Coast walks through the full decision.
XPile™ marine pilings available in Houston, TX and the Gulf Coast
XPile™ is sold exclusively through American Pole & Timber and Building Products Plus, both based at 12317 Almeda Rd, Houston, TX 77045. We ship across Texas, Louisiana, and the wider Gulf Coast, as well as nationwide and internationally. We follow a simple approach: consult, inform, and supply. We ask about your site, your loads, and your timeline, then spec the right piling for the job. If you are weighing materials for a marine build, our marine construction materials page is a good place to start, or you can compare against our EcoPile composite pilings.
Next step
Call for XPile™ specs and a quote for your project: (866) 216-0764. Tell us your diameters and we will spec it with you.
Frequently asked questions
What is XPile™ made of?
XPile™ is made of fiber reinforced polymer, a composite of glass fiber and resin formed into a solid, round structural piling. It contains no wood and no steel, so it does not rot, rust, or corrode.
How long does XPile™ last?
XPile™ carries a 50-year design life in marine environments, with little to no maintenance required over that period. There are no coatings to reapply, no wraps to replace, and no chemical retreatment.
Is XPile™ immune to marine borers?
Yes. XPile™ has no organic material for marine borers such as shipworms or Limnoria to feed on, so it is immune to borer attack in saltwater and brackish water.
Can XPile™ be cut and spliced on-site?
Yes. XPile™ cuts and splices on-site with standard tools. A single worker with a standard grinder can make a cut, with no heavy sawing or complex rigging required.
Where can I buy XPile™?
XPile™ is sold exclusively through American Pole & Timber and Building Products Plus in Houston, Texas. Call (866) 216-0764 for specifications, engineering data, or a project quote.
Sources and references
- American Wood Protection Association (AWPA) marine use category standards.
- U.S. Army Corps of Engineers, coastal structures guidance on marine foundation durability.
- ASTM International composite test standards (ASTM D6109, ASTM D1036) for FRP structural testing.