How Long Does Bathtub Reglazing Last?

Why 10–15 years, not 3–5

That gap is the heart of the value question. Independent 2026 cost research from Angi and HomeGuide puts professional bathtub refinishing at $200–$1,000 nationwide, about $490 on average; in Berkeley our work runs $739–$895, and the professional finish it buys lasts 10–15 years versus the 3–5 years a DIY kit typically holds. The number that matters is adhesion, and adhesion is decided before a single coat goes on. A professional reglaze starts with a deep clean to strip soap film and body oils, then a repair pass on chips, cracks and rust, then an acid/silane etch on porcelain or a scuff-sand on fiberglass so the surface is microscopically rough. A bonding primer goes down as the tie-coat, and only then do several thin coats of acrylic-urethane get sprayed on. Each of those steps exists to lock the finish to the tub. Do them all and the coating behaves like the original glaze for 10–15 years. Our own record bears that out: across more than 1,760 Berkeley fixtures refinished since 2014, warranty callbacks have run under 1.5% — roughly one job in seventy — and the tubs we sprayed in our first year are now 12 years old and still glossy.

A box-store kit cannot do that on a Berkeley tub. The product gets rolled on, usually with no acid etch and no separate tie-coat, often onto enamel that was wiped down rather than degreased to bare surface. Diego Sanchez sees the same arc every time he is called to a failed one: a glossy first month, then a lip of coating peeling back at the waterline, then the standing area wearing thin where the household actually stands. That lifting is delamination — the coating letting go of a surface it never truly gripped — and it is the single most common reason a Berkeley homeowner calls the studio to strip a finish and start clean. The urethane in the can is not the weak link. The hour of prep nobody did is.

What shortens a reglaze, and what to do when it wears out

A finish wears out for two reasons: bad prep on the original job, or hard daily use without basic care. We see the first far more often than the second. A tub sprayed over soap film, with no etch and no primer, will not reach five years no matter how gently you treat it. A properly prepped tub abused with scouring powder and a leaking faucet can also wear early, but that takes effort. In Berkeley's older homes — the cast-iron clawfoots of the hills, the built-in tubs of Elmwood and North Berkeley — the substrate underneath almost never fails, so the finish is the only thing that ages.

Here is the part owners are relieved to hear. A reglaze is not a one-shot deal — it resets. When the topcoat finally goes dull or thins out a decade or more down the road, the cast iron under it is almost always still perfect, so there is nothing to replace. Diego takes the worn finish back down to a sound base, runs the same etch-prime-spray prep he would on a fresh tub, and lays a new coat — for a fraction of what a replacement would cost and without the original heavy fixture ever leaving the room. Think of it less as a coating with an expiry date and more as a surface you can renew on the cheap whenever it earns it. See current Berkeley pricing or book a fresh reglaze.

What a 10–15 year finish looks like, year by year

Through the first 24–48 hours the acrylic-urethane is still gassing off and reaching full hardness, so the tub stays dry and unused. By the end of that window the topcoat is at full cure and ready for daily showers and baths. Through years one to three a properly sprayed finish reads exactly like new porcelain — high gloss, no chalking, no soft spots underfoot. Around the five-year mark, which is also where our written warranty sits, a finish maintained with non-abrasive cleaners shows no edge lift and no thin spots at the drain or the standing area. Between years eight and twelve the gloss may soften slightly in the wear zone where you stand, but the bond stays sound and the surface stays watertight. Somewhere past year ten to fifteen the topcoat finally dulls or thins enough to warrant a strip-and-respray rather than a repair. A DIY roll-on kit compresses that whole arc into 36–60 months: gloss for a season, edge lift by year two, and peeling at the drain by year three or four.

Two things move a Berkeley tub toward the high end of that range. First, the original prep — a clawfoot or cast-iron tub that was degreased, repaired, etched and primed before spraying simply has more bond to spend. Second, the household habits above: a fixed faucet, no suction-cup mat, and liquid cleaners only. Get both right and the finish behaves like a fixture, not a coating.

Does the tub material change how long a reglaze lasts?

Material sets the ceiling, prep sets the result. A reglaze bonds longest to dense porcelain-on-cast-iron — the tubs in most pre-1945 Berkeley homes — because the substrate is rigid and does not flex underfoot. Fiberglass and acrylic shells can still reach the high end of the range, but only if a soft floor is reinforced first.

Most of what we spray in Berkeley falls into three groups, and each ages a little differently. The cast-iron clawfoots and built-ins in the brown-shingle homes of the Berkeley Hills, Northbrae and the Claremont district are the easiest to push to 15 years: heavy, stiff, and acid-etchable, so the bonding primer grips hard. The pressed-steel and porcelain tubs in many North Berkeley and Westbrae bungalows behave almost the same once degreased and etched. The fiberglass and acrylic units common in the 1970s–80s apartment stock near the campus, Southside and along the San Pablo corridor in West Berkeley are the variable: a sound shell scuff-sanded with an adhesion promoter holds 10–12 years, but a floor that flexes when you step in will telegraph cracks through any coating unless it is braced from below first.

The honest limit: a thin gelcoat shell that is already cracked through the floor is past saving, and we will say so rather than spray a finish that fails in a year. For everything else, the material decides the ceiling and the prep decides whether you reach it.