Every offshore boat eventually needs canvas work done. The sail blows out at 0200, the dodger seam fails in the tropics, the batten pocket chafes through on a long passage. These guides cover the tools, materials, and techniques to handle the most common repairs yourself — from a temporary sticky-back patch to a hand-sewn UV cover replacement.
Sailmaker's Tools & Materials Aboard
The sail repair kit minimum, palm-thimble hand technique, sewing machines for offshore, thread selection, sailcloth types for patches, and Sunbrella for canvas work.
- The palm: most important tool aboard
- Sailrite LSZ-1 vs domestic walking-foot Singer
- Tenara PTFE thread for outdoor canvas
Sail Repair at Sea: Techniques That Hold
Blow-out types and where they happen, emergency field repairs, the herringbone stitch for tears, flat seam for joining cloth, batten pocket repair, UV cover replacement.
- Chafe tears at batten pockets — most common
- Herringbone stitch distributes load
- When to send to a loft vs repair aboard
Dodger & Bimini Repair and Maintenance
Sunbrella lifespan, cleaning and reproofing, seam repair, replacing Strataglass windows, the Delrin zipper specification, and when to replace the whole dodger.
- 7–10 years in tropics, 10–15 temperate
- Delrin plastic tooth zippers — correct spec
- Makrolon polycarbonate over Strataglass
Making Lee Cloths, Sail Covers & Cockpit Cushions
Lee cloth fabrication with Dyneema attachment and through-bolted D-rings, boom tent construction, sail covers, closed-cell cockpit cushions, and the economics of DIY canvas.
- Lee cloths: through-bolted D-ring mandatory
- Closed-cell foam — never open-cell
- DIY dodger: £300–600 vs £2,000–5,000 quote
About These Guides
These are practical editorial resources drawn from offshore sailing experience. Material specifications, product availability, and pricing change — always verify current figures before purchasing. For sail condition beyond field repair, consult a qualified sail loft. See also the sails section for sail inventory, materials science, and furling systems.