Why this comparison matters in SA
Vinyl is much smaller in SA than in North America. Installer density is thin, liner replacement supply chains run through 2–3 importers, and Eskom tariff hikes hit both shells equally. The question is whether vinyl's shape flexibility and lower entry price justifies a recurring R45k–R85k bill every decade.
10-year TCO
Assume a 7 × 3.5 m pool, mid-spec equipment, Gauteng pricing:
- Vinyl: R220,000 build + R65,000 liner replacement at year 10 = R285,000 plus monthly running costs
- Fibreglass: R260,000 build, no shell consumable in the 10-year window = R260,000 plus monthly running costs
- Verdict: fibreglass wins by ~R25,000–R60,000 over 10 years
Where vinyl actually wins
Tight backyards needing a non-standard rectangle (vinyl can be custom-formed on site), inland sites where fibreglass shell delivery from the factory is logistically painful, and budgets where the lower year-one outlay matters more than the year-10 liner bill.
Risk: liner availability
If your installer goes out of business — common in the smaller SA vinyl market — sourcing a replacement liner that matches the original pool wall geometry can take 3–6 months and force a fresh installer to do a survey. Always insist on the original wall-panel specs and a copy of the liner pattern in writing.