Sails wear out from a small number of causes, and most of them are avoidable. This page is not about trimming — it is about the handful of habits that decide whether a sail lasts three seasons or eight.
Flogging is the worst thing you can do
A sail left flapping is being destroyed, faster than by any other mechanism available.
Every flap works the cloth, the resin finish, the stitching and the tapes. A woven Dacron loses its finish and starts to stretch. A laminate begins to delaminate. Nylon breaks down at the edges. An hour of hard flogging costs more life than a season of sailing.
The cause is almost always the same: too much wind, and the sail at the wrong angle to it. A sail that is either sheeted or stowed does not flog. A sail that is neither — luffing, or hanging with the wind across it — does.
The predictable moments are head to wind while somebody sorts out a problem, motoring with the mainsail up and sheeted loose, and a headsail left to flap while the crew is doing something else.
All of it is avoidable. Sheet the sail, drop it, or bear away. If the boat has to sit head to wind, take the sail down or hold it against the rigging. This single habit is worth more to a sail’s life than everything else on this page combined.
Ultraviolet is the other one
Sunlight degrades sailcloth and degrades thread faster than cloth.
Cover the mainsail whenever it is not being used. A cover is cheaper than a sail by an order of magnitude.
Check the UV strip on a furling headsail. It is doing this job and it wears out; when its stitching starts to go, deal with it before the strip peels.
Do not leave a flying sail up at anchor. Nylon and Code Zero laminates are more UV-sensitive than upwind cloth, and they have no protection.
Chafe
Anywhere a sail touches something, it wears — slowly, invisibly, and then suddenly.
Spreader ends are the classic. Check the tips are taped and smooth, and look at the sail where it touches.
Guardrails, stanchions and the pulpit catch low-clewed headsails.
Lazy jacks and the cover mouth work against a mainsail every hoist and drop, and at anchor when the boat rolls.
The forestay takes a gennaker or spinnaker across it on every gybe.
Split pins, worn shackles, a rough anchor roller. Anything sharp finds a sail eventually.
Two things to do: run your hand over the rig looking for anything sharp, and look at your sails for the polished shiny patches that mean something is rubbing. Both are ten-minute jobs and both find problems while they are still cheap.
Do not over-load
Reef before you have to. A boat that is over-pressed is loading its sails harder than they were designed for, and it is also slower and less comfortable. The first reef is the one people take too late.
Do not use a rolled genoa as a storm sail. It is the wrong shape, the lead is wrong, and the load is concentrated on a small part of a sail full of turns. See Storm Jibs.
Watch for shock loads on flying sails. A spinnaker refilling after a collapse loads its corners far harder than steady sailing does. Preventing collapse is easier on the sail than surviving the refill.
Furling sails
Furl and unfurl under control, not by letting the sail flog its way in.
Take the load out before furling a flying sail. A sail furled while it is still drawing hard rolls badly and is hard on the gear. Exactly how you get the load out depends on the boat and the conditions.
Roll it properly. A tightly and evenly rolled sail keeps its own edges captive. A loose roll leaves the leech free to move, and a leech that flaps at the mooring in every breeze is wearing out its tape and its stitching while nobody is aboard.
Rolling is fine — folding is the problem. A roll is a gentle curve and it suits every cloth, laminates included. What a laminate objects to is being folded, especially along the same lines every time. That matters when the sail comes off for the winter, not while it lives on the furler.
Salt and water
Salt is hygroscopic — it holds moisture, and moisture is what grows mould and corrodes fittings. A salty sail is never quite dry.
Rinsing with fresh water when it is convenient, and drying before stowing, is most of sail care. See Cleaning, Drying and Storage.
Small things that add up
Secure line tails — a leech line tail left loose will flog and wrap.
Check batten tension occasionally. A loose batten rattles in its pocket; an over-tight one loads the receptacle continuously.
Do not step on sails, particularly on deck with grit underfoot.
Do not stow anything hard in a sail bag with the sail.
What normal ageing looks like
A sail that is used will get gradually softer, gradually fuller, and gradually less able to point. Colours fade. This is the sail doing its job, not failing.
What is not normal: something happening quickly, something happening in one place, or something that appears after a specific event. Those are worth looking at — see Inspection and Maintenance.
Detailed care guides
- Cleaning, Drying and Storage — material-specific cleaning and seasonal storage.
- Inspection and Maintenance — where to look, how often and what a symptom means.
- Lazy Cradles and Covers — setup and care for a covered mainsail system.