Originally Posted by marshmat
I seem to recall
the newer Dashew aluminum
powerboats are insulated with Armaflex, with good performance. Yes, it is horrifically expensive.
Yes, the Dashew FPBs used Armaflex.
Here is a link to a guy who built a steel
Buehler designed Swan 55. He used Armaflex, at first without the glue to save money
but he then switched to using the Armaflex with glue already applied to save time.
Building Koloa (Kama Hele): Insulation
He has several pages of discussions on using the product in the posts following the link.
At one point he had to add/change something on the hull
. I forgot exactly but he had to remove a part of his interior and the Arrmaflex. The insulation was well glued into place as I remember it.
Assuming one has the space, my two cents is to use a thick enough Armaflex to insulate the hull
and prevent moist air getting to the structure, then use a batt insulation like rock wool to finish. This should save a bit of money
, and depending on the build, allow access to cables