This is the first real decision in any in-ground pool project, and it drives everything that follows — cost, timeline, how the pool looks, and what you will spend maintaining it over twenty years. We install both, so we have no reason to push you toward one.
Fiberglass shell pools
A fiberglass pool arrives as a single moulded piece and is set into the excavation in one lift, by crane or excavator. Because the shell is manufactured off site, the shape and finish are already determined when it arrives.
- Higher initial cost
- Resistant to cracks, with a long service life
- Smooth gel-coat surface that resists algae
- Faster installation, since the shell arrives finished
- Shape and size are fixed to available models
- Requires clear access for delivery and lifting
If you want to see what the shapes actually look like, we keep a gallery of the fiberglass models we install.
Vinyl liner (steel wall) pools
A vinyl liner pool is built on site. The walls are bolted together, a concrete collar is installed below grade to stabilize the structure, the bottom is formed from concrete, vermiculite or sand, and then the liner goes in.
- Lower initial cost
- Longer installation, because it is assembled on site
- Liner needs replacement roughly every 7 to 12 years
- Far more flexibility in shape and size
- Soft surface underfoot
- Liners can be punctured, though repairs are routine
How to actually decide
If you want the lowest number today and the flexibility to build a shape that fits an awkward yard, vinyl liner is usually the answer. If you would rather pay more once and spend less time and money on the pool over the following two decades, fiberglass usually wins.
Access matters more than people expect. A fiberglass shell has to physically reach your back yard, which means a route wide enough for a trailer or clear airspace for a crane. On tight lots in older neighborhoods that constraint sometimes makes the decision for you, which is why we look at access during the site visit before recommending anything.