BoatworksToday · video

What this video covers

Fabricating a custom fibreglass hatch for a Bertram 25 requires preparing a mould using OSB and chopped strand mat.0:20 To ensure the fibreglass lays flat, always request that suppliers ship fabric rolled rather than folded to prevent kinking or creasing the fibres.7:56 When prepping the mould, prioritise fairing and sanding the final part rather than the mould surface to save time.6:18 For the mould skin, flood the porous OSB surface with catalysed non-waxed laminating polyester resin before applying the chopped strand mat to ensure a strong bond.9:31 Use torn strips of mat around the perimeter to create wispy edges that blend smoothly without creating hard humps.8:51 When working with polyester resin, spread the mixture into a thin film immediately after application to extend the working time and prevent the resin from overheating in the mixing cup.11:13

More from BoatworksToday

I Was Wrong About My Boat's Victron Wiring (You Were Right!)Sept 2026Will This Entire Victron Electrical System Fit In My Little Boat?Aug 2026The Primer Mistake You're Probably Making Painting Your Boat: Film Thickness, Not Smoothness!Aug 2026V-Berth Electrical Layout On A Small Sailboat: It's Tight, But It Should Work!Aug 2026

From BoatworksToday — see the channel’s boat, crew, and every analysed video.

The Sailing Directory Newsletter

One email with the fleet's best finds — the moments, boats, and stories worth your watch time. Enter your own address to get your own copy.