Apparently the folks at Jamestown heard your story the first time. They added that the closed-cell foam that results is 96% sealed so it won't soak up water. I was concerned while reading their brochure due to my experience with not being able to access every part of a hull when suddenly there is water collecting in the bilge. Oh well, the foam could be a good idea for that special where and when. On Mon, Nov 16, 2020 at 4:05 PM jerry montgomery <jmbn1@outlook.com> wrote:
Pour-in foam also soaks up water; I know from experience. The first boat I designed/built was a catamaran. I poured in roam in the ends, when built it weighed about 300 lbs, and after a year or so it started getting a little sluggish, so I weighed it again. Nearly 400 lbs.
I had to cut holes in the decks and stuck in a drill motor with a big spade bit, then vacuumed, then drilled, then vacuumed, etc. Dug out all the wet foam. Possibly foam is better now. I talked to the ownmer of Clark Foam and he told me that it needs very close conditions, like temperature and mixing it accurately and rapidly so that the closed cells are truly closed.
That's my story and i'm sticking to it.
jerry
________________________________ From: montgomery_boats <montgomery_boats-bounces@mailman.xmission.com> on behalf of Dave Scobie <scoobscobie@gmail.com> Sent: Monday, November 16, 2020 11:50 AM To: For and about Montgomery Sailboats < montgomery_boats@mailman.xmission.com> Subject: Re: M_Boats: two part foams
These foams have some significant dangers and negatives -
They all shrink and then encourage mold to grow in the void spaces.
After shrinking the now loose bits of foam will bounce and clunk ... especially when trying to sleep.
Improperly installed can blow the boat structures apart - like break bulkheads, rip out tabbing and deform the hull/deck/interior.
Make it impossible to access parts of the boat for maintenance and adding items later (meaning have to chip out the foam)
:: Dave Scobie :: M6'8" #650 :: SV SWALLOW - sv-swallow.com :: former owner M17 #375 SWEET PEA - m17-375.com :: former owner M15 #288 SCRED - www.freewebs.com/m15-named-scred/< http://www.freewebs.com/m15-named-scred/>
On Mon, Nov 16, 2020, 11:42 AM Thomas Buzzi <thomaspbuzzi@gmail.com> wrote:
Jamestown has just come out with a two part foam that looks great for filling in dead spaces below with positive foam flotation. Just mix and pour it in. I may use some of it with my Monty knowing that it will sink if holed.