Teak Decks: Care, Repair and Replacement Guide and Costs (2026)

A teak deck is the single most beautiful and most misunderstood surface on a yacht. Owners fall in love with the honey glow of fresh teak, then spend the next twenty years slowly grinding it away with pressure washers and stiff brushes. A teak deck can last thirty to forty years when it is built well and treated gently. The same deck can be worn to the caulk seams in eight years if it is scrubbed hard every week and blasted with a hose every time someone tracks salt across it. This guide walks through how teak decks are actually built, the care philosophy that keeps them alive, the reality of teak deck cleaning, teak deck caulking and re-caulking, when teak deck repair makes sense versus full teak deck replacement, the synthetic alternatives that are taking market share, and what all of it costs in 2026. It is written from the point of view of the people who do this work with a chisel and a caulking gun, not from a marketing brochure.

If you own a boat with a real teak deck, or you run one as captain, the most valuable thing you can learn is restraint. Teak does not need much. It needs the right kind of little, done consistently, and it needs the wrong kind of attention to stop. Everything below is built around that idea.

How a teak deck is built

Before you can care for a teak deck or judge whether it needs repair, you have to understand what is under your feet. Not all teak decks are the same, and the construction method decides almost everything about how the deck ages, how it can be fixed, and how much life is left in it.

Why teak in the first place

Teak earned its place on boats for reasons that have nothing to do with looks. The wood is loaded with natural oils and silica, which make it resistant to rot, marine borers, and fungus without any coating at all. It stays reasonably grippy when wet, which is why decks and cockpit soles have used it for centuries. It moves less with moisture than most timbers, and it holds fasteners and caulk well. Genuine Burmese teak was the gold standard for generations. Most teak decks laid since the 1990s use plantation teak, which grows faster, has more sapwood, wider grain, and lower oil content. Plantation teak is perfectly serviceable, but it is softer and less forgiving than old-growth stock, which matters a great deal when we talk about aggressive cleaning later.

Traditional screwed and plugged decks

The old way, and still the way a top yard will build a deck it wants to last, is to lay teak planks over a subdeck and fasten each plank down with screws driven into counter-bored holes. A wooden plug, cut from the same teak and matched for grain, is glued over each screw head so the fastener never touches your foot or the weather. Between the planks, the shipwright routs or leaves a gap, primes the seam, and fills it with a flexible marine caulk. This is the classic look: straight caramel planks with thin black seams, the occasional round plug visible where the grain shifts.

A screwed and plugged deck has one enormous advantage. The plank is thick, often 12mm to 20mm of wearable teak sitting above the screw head. That thickness is your lifespan. Every time the surface is sanded or scrubbed away, you lose a little, and the clock runs down to the moment the screw heads start to show. A thick traditional deck can be sanded lightly several times over its life and still have decades left. The downside is that every plug is a potential leak path, and every screw penetrates the subdeck, so a poorly maintained traditional deck can let water into the core and cause far more expensive damage below.

Bonded and glued decks with no plugs

The modern method glues the teak directly to the subdeck with a marine adhesive, most often a polyurethane bedding compound, and uses no screws at all. Because there are no fasteners, there are no plugs, so a bonded deck has an unbroken plank surface with no round dots in it. Builders like this because it is faster, lighter, and it eliminates the hundreds of screw penetrations that plague traditional decks. Many production and semi-custom yachts from the 2000s onward use bonded teak.

Bonded decks come with a serious catch. To save weight and cost, the teak is often thin, sometimes only 5mm to 8mm above the glue line. There is very little wood to lose before you hit the adhesive. That means a bonded deck tolerates almost no sanding, and if the surface wears down or the glue bond fails, planks lift and the only real answer is replacement. A bonded deck that has been scrubbed hard for a few seasons can be beyond repair while a traditional deck of the same age still has years in it. Knowing which type you have is the first diagnostic step any specialist takes.

The care philosophy: grey, oiled, or sealed

Here is where owners argue and where a lot of good decks get ruined. There are three broad approaches to living with a teak deck, and none of them is wrong. What is wrong is switching between them constantly, or chasing the fresh-cut look with abrasives and chemicals. Pick a philosophy and stay with it.

Leave it grey

This is what most professional captains and most shipwrights actually recommend for a deck that has to last. Untreated teak weathers to a soft silver grey as the surface lignin breaks down under UV. That grey layer is not damage. It is a protective patina, and a grey deck is a low maintenance deck. You wash it gently with salt water, you rinse it, and you leave it alone. It looks like a working yacht should look. The grey approach removes the least wood over time because you are not sanding, not applying and stripping coatings, and not scrubbing to keep up appearances. If longevity is the goal, grey wins.

Oil it

Teak oil products, and the more sophisticated sealers marketed as oils, restore that warm golden color and darken the grain. Owners who want the yacht to look freshly built go this route. The honest truth about oiling: it is a commitment, not a one-time fix. Oil sits on the surface, feeds mildew in warm climates, washes out, and needs reapplication every few weeks to a couple of months depending on sun and use. Worse, when an oiled deck starts to look patchy and grey again, the temptation is to scrub off the old oil with a cleaner and start over, and that scrubbing is what actually kills the wood. Oiling makes a deck look wonderful for a wedding photo and creates a maintenance treadmill for the years after.

Seal it

Modern sealers are the middle path. A product like Semco Teak Sealer penetrates the wood rather than forming a film on top, and it holds color for months instead of weeks. Semco and similar sealers are popular exactly because they cut the reapplication burden while keeping the golden tone. The trade is that you still have to prep the deck, apply evenly, and refresh it once or twice a year, and any sealer eventually needs the surface cleaned before recoating. A penetrating sealer is far kinder than film-forming varnish, which cracks, peels, and turns a teak deck into a stripping and sanding project. Never varnish a teak deck you walk on. Save brightwork coatings for rails and trim, which we cover in the marine varnishing and brightwork guide.

Care approach comparison

Approach	Look	Maintenance effort	Wood lost over time	Best for
Leave grey	Soft silver, matte, working-yacht look	Lowest: gentle wash and rinse only	Least, no abrasion or stripping	Longevity, thin bonded decks, charter and cruising boats
Oiled	Warm honey gold, rich grain	Highest: reapply every few weeks, mildew prone	High if scrubbed to re-oil	Show boats, temperate climates, owners who love the look and accept the work
Sealed	Golden, more even than oil, holds color for months	Moderate: prep and recoat once or twice a year	Moderate, depends on prep method	Owners who want color without the oiling treadmill

Teak deck cleaning done right

Teak deck cleaning is the part every owner does and most owners do badly. The wood is soft, and the grain is a series of hard latewood ridges separated by softer earlywood. When you scrub, the soft wood between the ridges erodes first, leaving those ridges standing proud. That is the raised, ribbed, splintery texture you see on abused decks. It is not the wood aging. It is the wood being sanded away by a brush, one stroke at a time.

Across the grain, never along it

The single most important rule of teak deck cleaning: scrub across the grain, never along it. When you brush along the length of the plank, you follow the soft channels and dig them deeper. When you brush across the plank, side to side, the soft and hard wood wear evenly and the surface stays flat. This one habit doubles or triples the life of a deck. Use a soft brush, the softest that will still lift the dirt, and let the cleaner and the water do the work instead of your arm.

Salt water, soft brush, gentle chemistry

Wash the deck with salt water when you can. Salt water is gentle, it discourages some growth, and it does not strip the wood the way harsh detergents do. A soft deck brush, a bucket of sea water, and a light hand will keep a grey deck looking exactly as it should. If you need a cleaner, use a mild boat soap or a dedicated one-part teak cleaner used sparingly, then rinse thoroughly. Do the whole job with a soft brush moving across the planks. That is the entire routine for most boats.

Why aggressive cleaning kills teak

Everything that makes a deck look instantly bright is the thing that destroys it. Pressure washers blast the soft earlywood clean out of the seams between the grain ridges, and a few passes with a wand can remove a season of wear in an afternoon. Stiff and wire brushes do the same by hand. Two-part acid teak cleaners, the bright ones that turn grey teak gold in one wash, work by chemically eating the surface layer of wood, and while the result looks dramatic, you have literally dissolved wood off the top of your deck. Every one of these methods trades years of deck life for one clean weekend. On a thin bonded deck with 5mm of teak, a couple of aggressive cleanings a year can be the difference between a deck that lasts twenty years and one that fails in six. If your deck is grey and you want it gold, use a sealer, not an acid. Sealing adds color without removing wood.

How often to clean

Less than you think. For a deck you are leaving grey, a gentle salt-water wash whenever it is visibly dirty, realistically every week or two in season, is plenty. A deep clean with any cleaning product should happen at most once or twice a year, and on a thin deck, closer to once. Every deep clean removes wood, so the goal is to keep the routine washes so gentle that deep cleans are rarely needed. An owner who lightly rinses often and scrubs hard almost never will keep a deck decades longer than an owner who blasts it clean every Saturday.

Caulking and re-caulking

The black lines between the planks are not decoration. That teak deck caulking is a flexible seal that keeps water out of the seams, allows the planks to expand and contract with heat and moisture, and ties the deck together. When the caulk fails, water gets under the planks, into fasteners, and eventually into the deck core, which is where a cosmetic problem becomes a structural one. Caulk is the part of a teak deck that most often needs work while the wood itself is still fine.

How caulk fails

Caulk fails in a few predictable ways. It loses adhesion to the plank edge and pulls away, leaving a gap you can slip a fingernail into. It cracks or splits down the middle. It sits proud or sinks below the wood as the surrounding teak wears down. Or it simply goes hard and brittle after fifteen to twenty years of sun and salt and stops flexing with the deck. Any of these lets water track under the seam. A quick test: run your thumbnail along a seam. If the caulk is soft and rubbery and firmly stuck on both sides, it is healthy. If it is hard, lifting, or cracked, that seam needs attention.

The products: Sikaflex and TDS

The two names you will hear are Sika and Teak Decking Systems. Sikaflex marine polyurethane sealants, particularly the black deck-caulking grades, are the industry standard for both new decks and re-caulking. Teak Decking Systems, TDS, makes a caulk widely used on new-build and refit decks and is often specified by yards that build teak for a living. Both are polyurethane-based, both cure to a tough flexible rubber, and both require the seam to be properly prepared and primed before they will hold. The caulk is only as good as the prep. A seam that is not clean, dry, and primed will release the caulk within a season no matter how good the product is.

The re-caulking process

Re-caulking is skilled, patient work. The old caulk is cut and raked out of every seam, right down to the bottom, without gouging the plank edges. The seams are cleaned, sometimes with a reefing tool and then solvent, and left dry. A bond breaker tape may go in the bottom of the seam so the caulk sticks only to the two plank edges and can flex, not to the base. The edges are primed with the caulk maker's primer. Then the seam is filled slightly proud with fresh caulk and left to cure fully, which can take days. Once cured, the excess is cut and sanded flush, carefully, so the surrounding wood is not eaten away. Doing a whole deck this way is a big job, which is why full re-caulks are priced by the linear foot of seam and add up quickly on a large yacht.

Plugs, screws, and modern bonding

On a traditional screwed and plugged deck, the plugs are the early warning system. As the deck wears, the plugs wear with it, and eventually a plug pops out or wears through to reveal the screw head beneath. A missing plug is a direct water path to the fastener and the subdeck, so plugs should be replaced as soon as they fail. Re-plugging is straightforward for a specialist: the old plug and any loose material are cleaned out, the hole is checked, and a new grain-matched teak plug is glued in with the grain running the same direction as the plank, then trimmed flush once set.

The problem arrives when a traditional deck has worn so far that the screw heads themselves are at or near the surface across large areas. Once the wood above the screws is gone, there is nothing left to plug into and the deck has reached the end of its sandable life. At that point you are choosing between a major repair, refastening deeper if any thickness remains, or replacement. A bonded, glued deck has no screws and no plugs, which means fewer leak paths but also no fasteners holding a lifting plank down. When a bonded plank's glue line fails, it starts to rise at an edge or corner, and because there is no screw to pull it back, the fix is to re-bond or replace that plank. The absence of plugs on a bonded deck is the quickest way to tell it apart from a traditional one at a glance.

Repair or replace: making the call

This is the decision that keeps owners up at night, because the numbers are large in both directions. A few honest measurements settle most of it.

Measure the wood you have left

The governing number is teak thickness. Find a spot where you can measure the wearable teak above the fasteners or the glue line, at a plug edge, a fitting, or a deck fill. If a traditional deck still has 6mm or more of good teak above the screws across most of its area, it has real life left and repair is usually the answer. If a bonded deck is down near or below 4mm to 5mm, or planks are lifting, replacement is on the table. Below roughly 4mm on any deck, you are into fragile territory where the deck can fail suddenly and re-caulking or sanding does more harm than good.

When repair makes sense

Repair is the right call when the wood is healthy but specific things have failed: a section of caulk, a run of plugs, a few cracked or lifted planks, a leak around a fitting, or damage from a dropped object or a dragged chain. Individual planks can be lifted and replaced with new teak matched to the deck, seams can be re-caulked in the affected area, plugs can be renewed, and the repair blended in. As long as most of the deck is sound, spot repairs and partial re-caulks keep the deck going for years at a fraction of replacement cost. A deck that is mostly grey and flat with a few tired areas is almost always a repair, not a replacement.

When replacement wins

Replacement becomes the honest answer when the teak is simply too thin to work with, when screw heads are showing over large areas, when planks are lifting across a bonded deck, or when water has already gotten under the deck and into the core. Chasing repairs on a worn-out deck is throwing money at a surface that will keep failing. There is also the water-intrusion trap: a deck that leaks into a balsa or foam core can rot the structure below, and at that point the cost is not just new teak but core repair, which dwarfs the deck itself. When a survey finds soft core under teak, replacement plus core work is usually unavoidable. General timing of jobs like this fits into the wider picture in our yacht maintenance services complete guide and costs.

Synthetic teak alternatives

A growing number of owners, tired of the wear-and-replace cycle, are switching to synthetic teak when the real deck reaches the end of its life. The materials have improved to the point where a good synthetic deck reads as teak from a few feet away and behaves far better underfoot in the sense that it does not wear, does not need re-caulking, and does not turn to splinters. The three names that dominate are Flexiteek, Esthec, and PlasDeck.

Flexiteek

Flexiteek is a PVC-based synthetic decking, extruded as planks with a molded caulk line, that is cut and welded to fit the deck as a single custom panel. It resists UV, stains, and fuel, needs only soap and water, and never needs oiling or re-caulking. The current generation has softened the plastic look that dogged early synthetic decks, with more natural grain and color options including grey-toned teak. It gets hot in strong sun, which is the main complaint, and it does not have the exact feel of real wood, but for an owner who wants a deck they can ignore for twenty years, it is a serious option.

Esthec

Esthec is a composite decking used on many large yachts and superyachts, valued for its fully custom color and pattern options and its smooth jointless molded appearance. It is a higher-end product, often specified where the designer wants a particular look and a maintenance-free surface, and it is priced accordingly. Esthec tends to appear on bigger and newer boats where the budget supports it.

PlasDeck

PlasDeck is another PVC-based synthetic decking, popular in the North American market, offered in a range of plank and seam colors and installed as a custom-fit deck. Like the others it is washed with soap and water and never oiled or caulked. It sits at a more accessible price point than the superyacht composites and is common on sport boats, center consoles, and mid-size cruisers.

Real teak versus synthetic

Factor	Real teak	Synthetic (Flexiteek, Esthec, PlasDeck)
Look and feel	Genuine wood grain, natural warmth, unbeatable up close	Very good from a few feet, does not fully match wood underfoot
Maintenance	Gentle washing, periodic caulk and plug work, optional sealing	Soap and water only, no caulking, no oiling
Wear	Wears down over years, finite lifespan tied to thickness	Extremely wear resistant, decades of surface life
Heat underfoot	Stays cooler, natural wood	Can get noticeably hot in strong sun
Repair	Planks, plugs, and seams repairable in place	Damage usually means re-welding or replacing a section
Resale and character	Prized on classic and quality yachts	Practical, accepted, less prestige on traditional boats
Environmental	Slow-grown hardwood, sourcing concerns	Synthetic, some products recyclable, no old-growth wood

2026 costs

Prices vary by region, boat size, deck condition, and yard rates, but the ranges below reflect what owners are quoted in 2026 for typical work. Treat them as planning numbers, not fixed prices, and always get an on-boat quote.

Cleaning

Doing it yourself costs almost nothing beyond a soft brush, a mild cleaner, and your time. A professional gentle deck cleaning, done correctly and not with acid, typically runs in the range of a few hundred dollars for a small to mid-size deck up to the low four figures on a large yacht, depending on square footage and how much hand work the crew puts in. Sealing with a product like Semco adds to that, both for materials and the labor of prepping and applying evenly. The right way to think about cleaning cost is that a gentle routine you do yourself is close to free and preserves the deck, while paying for repeated aggressive cleaning both costs money and shortens the deck's life.

Caulking and re-caulking

Teak deck caulking is priced by the linear foot of seam, and in 2026 professional re-caulking generally runs from roughly 4 to 12 dollars per linear foot for the seam work, with the total driven by how many feet of seam your deck has. A deck with many narrow planks has far more seam length, and therefore more cost, than a deck with wide planks. A partial re-caulk of a few failed seams might be a few hundred dollars. A full re-caulk of a large deck, with thousands of feet of seam, routinely reaches into the thousands or tens of thousands of dollars once you add the labor to rake, clean, prime, fill, cure, and trim every seam. Spot caulk repairs are the cheapest way to stay ahead of leaks and are worth doing early.

Partial repair

Replacing individual planks, renewing plugs, and fixing a leak around a fitting are usually billed at a yard's hourly shipwright rate plus materials. A handful of planks and some plugs might land in the hundreds to low thousands of dollars. The value of partial repair is that it keeps a sound deck in service for a fraction of replacement, so it is almost always worth pricing repair before committing to a full new deck.

Full replacement

Full teak deck replacement is one of the larger jobs a boat can face. In 2026, budget roughly 40 to 100 dollars or more per square foot for a new traditional teak deck, materials and labor combined, with high-end custom work on superyachts running well beyond that. The teak itself is expensive and getting more so, and the labor to lay, fasten or bond, plug, caulk, and finish a deck is enormous. A modest 200 square foot cockpit and side-deck area can run from around 8,000 dollars into the tens of thousands, and a full superyacht deck is a six-figure project. Synthetic replacement is often quoted in a similar or slightly lower per-square-foot range for the installed deck, with the savings coming later in eliminated maintenance rather than a dramatically lower install price. If the old deck leaked into the core, add core repair on top, which can rival the cost of the deck itself.

Lifespan and what determines it

How long a teak deck lasts is almost entirely a function of two things: how thick it started and how gently it is treated. A traditional screwed and plugged deck built with thick, good-quality teak and washed gently can run thirty to forty years, sometimes more, with periodic re-caulking along the way. A thin bonded deck treated the same way might give fifteen to twenty-five years. The same decks, scrubbed hard along the grain, pressure washed, and acid-cleaned, can be finished in well under a decade. Caulk has its own clock, typically fifteen to twenty years before a full re-caulk, though individual seams fail sooner. The takeaway that every teak specialist repeats: you cannot add wood back, so every year of life comes from not removing wood you do not have to. Gentle care is not just cheaper, it is the whole game.

Teak decks also age alongside the rest of the boat's finishes, and a coordinated maintenance plan across hull, brightwork, and deck pays off. If you are thinking about overall presentation and protection, the boat detailing guide and costs covers how deck care fits with washing, waxing, and protecting the rest of the yacht.

Finding a teak specialist

Teak deck work rewards specialists and punishes generalists. Raking and re-caulking seams, matching plank grain, lifting and re-bonding planks, and knowing when to stop sanding are learned skills, and a good teak deck crew will save you money by doing less, not more, and by telling you honestly when repair beats replacement. Look for someone who asks about your deck's construction before quoting, who talks about measuring remaining thickness, who scrubs across the grain, and who does not reach for a pressure washer or an acid cleaner as a first move. Ask to see decks they have re-caulked a few seasons ago, because good caulk work still looks good years later and bad work does not.

When you compare quotes, make sure they are quoting the same scope. A cheap re-caulk that skips proper prep will fail in a season. A replacement quote that ignores possible core damage is not a real number. Get the deck inspected, get the construction type confirmed, and get the remaining thickness measured before you commit to any large job.

Yacht Service Network is a free marine-services marketplace and directory built to connect boat owners and captains with the right marine trades, including teak deck specialists, shipwrights, and refinishers. Post your job at no cost, describe the deck, and let vetted local pros send you quotes so you can compare on experience and price instead of guessing.

Frequently asked questions

Should I oil my teak deck or leave it grey?

For longevity, leave it grey. The grey patina protects the wood, and a grey deck needs only gentle washing. Oiling looks beautiful but starts a treadmill of reapplication and, worse, tempts you into scrubbing off old oil, which removes wood. If you want the golden color with less harm, use a penetrating sealer like Semco rather than oil, and never scrub hard to keep the look up.

Why does my teak deck feel ridged and splintery?

Because the soft wood between the grain ridges has been scrubbed away, leaving the hard latewood standing proud. This comes from cleaning along the grain, using stiff brushes or pressure washers, or acid cleaners. Switch to a soft brush, scrub across the grain, and stop the aggressive cleaning. The ridging will not reverse, but you can stop it getting worse and preserve what teak is left.

How do I know if my deck is screwed-and-plugged or bonded?

Look for the round plugs. A traditional screwed deck has visible teak plugs over every fastener, usually in regular rows. A bonded, glued deck has none, so the plank surface is unbroken. This matters because bonded decks are usually thinner, tolerate no sanding, and are replaced rather than deeply repaired, while traditional decks have more wood and more repair options. A specialist can confirm and measure thickness.

How often does a teak deck need re-caulking?

A full re-caulk is typically needed every fifteen to twenty years, though individual seams fail sooner and should be spot-repaired as they go. Check seams by running a thumbnail along them: healthy caulk is soft, rubbery, and stuck to both plank edges, while failed caulk is hard, cracked, or lifting. Re-caulking failed seams early keeps water out of the deck and prevents far more expensive core damage.

Is synthetic teak worth it?

For many owners, yes, especially when the real deck has worn out. Flexiteek, Esthec, and PlasDeck never need oiling or re-caulking, wash with soap and water, and last for decades of surface wear. The trade-offs are that they can get hot in strong sun and do not perfectly match real wood underfoot or in prestige. On a classic yacht, owners usually stay with teak. On a boat run hard or chartered, synthetic often makes more sense.

What does a full teak deck replacement cost in 2026?

Budget roughly 40 to 100 dollars or more per square foot for a new traditional teak deck installed, with superyacht and custom work running well beyond that. A small cockpit and side-deck area can run from around 8,000 dollars into the tens of thousands, and a large yacht deck is a six-figure job. If the old deck leaked into the core, add core repair, which can rival the deck cost. Always get an on-boat quote, because condition and access change the number significantly.

Can I pressure wash my teak deck if I use a low setting?

Better not to. Even at lower pressure, the jet blasts the soft earlywood out of the grain and shortens the deck's life. The safe routine is salt water, a soft brush across the grain, and a light hand. A hose on gentle flow to rinse is fine. Save the pressure washer for the hull and hardstanding, never the teak.

The short version

A teak deck is a finite thickness of beautiful wood, and every maintenance choice either spends that thickness or preserves it. Build knowledge first: know whether you have a thick traditional screwed deck or a thin bonded one, because that decides everything. Pick a care philosophy, ideally leaving the deck grey, and stick to it. Clean gently, across the grain, with a soft brush and salt water, and treat pressure washers and acid cleaners as things that destroy decks. Keep the caulk healthy with early spot repairs and a full re-caulk every fifteen to twenty years using proper Sikaflex or TDS products and proper prep. Repair when the wood is sound and only replace when the teak is genuinely too thin or the core is wet. When you go to hire, use a real teak specialist, get the deck measured before you spend, and compare quotes on the same scope. Do that, and a teak deck will reward you with decades of the best-looking surface on the water.