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Inground Pool Types: Fiberglass vs Vinyl vs Gunite
A builder's honest comparison of the three inground pool types — build time, real lifespan, running costs and what you can't change later.
6 min readUpdated Aug 18, 2026
Pool Installation & Construction
Buying a pool is the single largest discretionary purchase most households ever make outside a vehicle, and it is sold in an industry where quotes are hard to compare on purpose.
These guides tell you how each construction type is actually built, what the timeline really looks like, where builders pad and where they cut, and which decisions you cannot change later.
6 guides in this section
What you will find here
- Fiberglass vs vinyl vs gunite, with the real trade-offs
- What a build actually looks like week by week
- Permits, setbacks, bonding and inspection realities
- The contract terms and allowances that cause disputes
Start here
The guide that covers the whole subject
If you only read one page in this section, make it this one. Everything else here builds on it.
All installation guides
Everything published on installation, newest first.
Guide
How to Choose a Pool Builder: Contracts and Red Flags
How to vet a pool builder, what has to be in the contract, the exclusions that blow budgets, and the equipment line in the spec that nobody reads.
6 minUpdated Sep 6, 2026
Guide
Pool Access on a Tight Lot: What Actually Fits
More small-lot pool projects die on access than on space. Gate widths, what each machine needs, and the options ladder when nothing fits.
4 minUpdated Sep 6, 2026
Guide
Pool Construction Timeline: Week by Week
The real build sequence for gunite, fiberglass and vinyl pools, where delays come from, and what your yard looks like at each stage.
5 minUpdated Aug 23, 2026
Guide
Pool Permits and Planning: What You Need Before You Build
What permits you need, how long they take, the contract terms that cause disputes, and how to compare three quotes that all say different things.
6 minUpdated Sep 30, 2026
How-to
Above Ground Pool Installation: Start With the Base
Site prep, leveling tolerances, what actually shortens an above ground pool's life, and where people go wrong on day one.
5 minUpdated Jun 16, 2026
Common installation questions
How long does it take to install an inground pool?
Fiberglass is fastest at roughly 2–5 weeks on site once permits are in hand. Vinyl liner runs 3–6 weeks. Gunite or shotcrete runs 8–16 weeks because the shell has to cure and the finish trades stack in sequence. Permitting can add anywhere from two weeks to several months depending on the jurisdiction.
Do I need a permit to install a pool?
Almost everywhere in the US, yes — for anything holding more than about 24 inches of water, and separately for the electrical bonding and any gas line. Above-ground pools are not automatically exempt. Building without one risks a stop-work order and problems at resale.
Which inground pool type lasts longest?
A well-built gunite shell can last 50 years with resurfacing every 10–15 years. Fiberglass shells routinely go 30+ years with no resurfacing but the gelcoat can fade. Vinyl liner pools have the longest-lived structure but need a new liner every 8–12 years.
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