Fiberglass vs. Replaster in North Texas: How to Actually Decide

This is the decision almost every DFW pool owner reaches eventually, and most of the advice online is written by somebody who only sells one of the two. Here's the honest version, including where plaster is the better call.

Short answer: If your shell is sound, has never been resurfaced, and you're selling within a couple of years, replaster. If it's cracked, has been replastered two or three times already, or you're running salt, fiberglass is the one that ends the cycle.

What each one actually is

Plaster is a cementitious coating troweled onto the shell. It's the default, it's cheaper on day one, and it's porous. The surface has texture, and texture gives algae and bacteria somewhere to hold.

Our fiberglass system is 100% Owens Corning reinforced matting laid into high-quality ester resin and bonded as one continuous laminate across the entire interior. It isn't a coating; when it cures the pool has a new skin. It can be applied over gunite, plaster, concrete, vinyl liner or prefabricated fiberglass.

Who should choose plaster

Owners with a structurally sound shell that has never been resurfaced, on a pool they don't intend to keep long. Plaster will be the lower number and there's nothing wrong with taking it. Anyone who tells you plaster is never the right answer is selling.

Who should choose fiberglass

Four situations where it isn't close:

• The shell has a structural crack. Plaster over a moving crack is money spent twice.
• It's been replastered two or three times. There isn't much sound material left to bond to.
• You run or are converting to salt. Salt is hard on plaster over the years; a non-porous surface is a far better partner for it.
• You're tired of chemistry. The single most common thing customers tell us afterward is that the pool got easier to maintain.

Why North Texas specifically changes the maths

The Blackland Prairie clay under most of the Metroplex swells when wet and shrinks hard when dry. Through a wet spring into one of our summers, the ground under a rigid gunite shell moves, and doesn't move evenly. That's the mechanism that turns hairline crazing into structural cracking here far more often than in regions with stable soil. A coating cracks with the shell it sits on. A continuous laminate over a stabilised crack behaves differently.

When to do it

Autumn through late winter, for two reasons: contractor books open up once the season ends, and the pool being out of service in November costs you nothing. See the seasonal guide for the exceptions that shouldn't wait.

Where it applies

Everything above holds across Dallas–Fort Worth, but weights differently by area. In Rockwall, movement and cracking drive the decision. In Garland, it's the repeat-replaster problem. In Plano, it's usually salt and long-run cost.

How the job runs

Drain and strip to sound substrate → stabilise any structural cracks with staples every 12 inches → laminate the full shell including steps, benches and attached spa → colored gel coat, worked smooth → refill, equipment start-up, walkthrough.

Tradeoffs and limits

Fiberglass costs more up front. That's the real tradeoff and there's no way around it. It also isn't a fix for a shell that has genuinely failed structurally; stabilising a crack is not the same as rebuilding a collapsed wall. And no surface is maintenance-free: a non-porous finish reduces chemical demand; it doesn't eliminate pool care. If anyone promises otherwise, be careful.