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Sailiboat Hatches & PortlightsHow-To Guides

Bring light and fresh air below deck with the right hatches and portlights. Learn how to size, seal, and replace them to keep your cabin dry, bright, and ventilated.

  • Lewmar Low Profile Hatch Size 60 Seal Kit Spare, black rubber closing seal ring

    Where to Buy Lewmar Hatch Replacement Parts

    Lewmar hatch parts are sold by profile, size, and part type. Learn which spare -- seal kit, hinge kit, lid assembly, handle kit, trim kit, or flyscreen -- fixes your...

  • Lewmar Low Profile Hatch Size 10, open, showing the aluminum frame and dogging handles

    How to Measure a Lewmar Hatch for a Replacement

    How to measure your existing Lewmar hatch's deck cut-out and identify its profile — Low Profile, Medium, Ocean, Flush, Ultra Low or Pilot — before ordering a correct replacement.

  • Lewmar Low Profile Hatch Size 40, grey acrylic / silver frame

    How to Rebuild a Lewmar Low Profile Hatch

    A practical guide to servicing a Lewmar Low Profile hatch part by part — diagnosing hinge, seal or friction-lever failure, the general disassembly/reassembly sequence, and when a full hatch replacement...

  • Lewmar Standard Opening Portlight Size 1, smoke acrylic with silver frame and white trim

    Lewmar Portlights

    Standard/Atlantic or Flush Mitre—which opening portlight suits your boat? Learn how profile, installation location, and weather exposure guide the choice for watertight ventilation and light.

  • Lewmar Standard Port (Old) Size 4 Opening Window - Acrylic Only - Green

    Lewmar Hatches

    How do you choose a deck hatch for light, ventilation, and access? Learn how Lewmar's Ocean, Medium and Low Profile, and Flush series differ, and how to match hatch size...