Frank101 said..
For those who read an earlier post, I'm pretty sure we settled on the Holland 25. The boat needs work and is bare fibreglass in the cabin, which would get a bit warm in the sun and cold in winter. Is there a generic material and glue for insulation?
Frank
A 25 foot fibreglass yacht will be hot inside in summer no matter what insulation it has. Most of the insulation in small boats will be for noise reduction not heat. Best bet is to install several air vents in the cabin and a vent near the stern to allow air to exit while the boat is on the mooring. A decent opening forward hatch will be better than any insulation. Hopefully the Holland 25 cockpit is long enough to sleep on. That's where you will be on a hot summers night anywhere North of Tasmania.
My boat has a 12mm timber deckhead with about 30mm air space. Cabin sides are 12mm melamine. Saloon sides are cork. Hull around the quarter berths are 10mm sponge that has been painted with flat white paint. Still hot in summer.
In the main saloon I have 4 of these.
www.whitworths.com.au/vent-genuine-seabird Another one in the head and another dome one that does not work so well.
For a Holland 25 I would suggest just gloss white paint to keep the maximum headroom and make it look cool. Stitch up a shade sail to be erected just above the cabin whilst at anchor. Seabird vents on the cabin top.
