Sail Lifevideo
The road back to boat work: Bunker roof, done! Ep. 699
10 October 2026 · 22 min · 83K views
What this video covers
Mads constructs a new roof for a concrete bunker to prevent water ingress, utilising 29-gauge metal panels over an OSB substrate.10:00 To ensure hurricane resistance, he secures the OSB with nails spaced at 6-inch intervals and fastens the metal panels using specialised screws with coarse threads and thick shanks, rather than standard purlin screws.3:24 He installs an underlayment as a secondary moisture barrier and adds foam inserts beneath the metal panels.4:13 The project includes a custom DC emergency lighting system powered by a Renogy Reserve Mini Smart lithium-ion phosphate battery, protected by a 10-amp Class T fuse and a DIN-mounted relay to trigger lights during AC power loss.7:31 While installing the roof, Mads sustains a puncture wound to his heel from a protruding screw, necessitating an urgent care visit for a tetanus check.15:16 He plans to partition the bunker into a dedicated server and battery room to isolate noise from industrial equipment, leaving space for a home office.16:47 Proper screw compression and fastener selection are critical for maintaining the watertight integrity of exposed-fastener metal roofing.
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