Originally Posted by Celestialsailor
I have a method that worked well for me and will share it here at the expense of CMD belly laughing at me...
...I tab (on one side) the bulkhead slightly off the hull
. Then I layer a X-mat with a generous radius. Next I take spray foam (low expansion) and lay a bead in the gap. After it is dry, I shape a radius on the foam and glass over that. then sand smooth the whole affair.
This sounds like a pretty good system for a solid hull so as not to create any hard spots and easier then trying to lay in foam strips. But since my hull has about 3/4" of foam core
between two layers of 3/16" laid glass, Cat Man Do's system would be quicker. BUT! I do think tappering the ply a bit does give a better bond for a structural BH. Although, this bulkhead is not
structural. The forward section of the boat already has multiple stringers running fore/aft and up/down. It's to build in the head/shower and hanging locker, for storage
& w/shelves forward of that.
C M D, thanks for the joggle stick
link I had forgotten about that system, which is easier to get in/out of the boat.
Originally Posted by Benz
consider making your bulkheads out of foam-cored fiberglass
. Then the tabbing will be sure to bond to both bulkhead and hull, and the bulkhead becomes one piece with the rest of the boat. My entire boat--hull, decks, cabin
and bulkheads--in consequence of building like that, is for all intents and purposes one seamless piece, and there is no wood coring anywhere that will rot
out with time. A little more difficult and expensive than plywood
, (maybe not, when you factor in the high cost of epoxy
versus poly or vinyl-ester), but a lot better in the end.
I considered this BUT the material was about $160 a sheet X 2. Plus, I'd still have to overlay it with a wood laminate to make it perdy (another form cut) and then there is the interior
walls that need to be attached w/doors and trim the passage
way. The boat's 30 YO and only needs to last the rest of MY life (62 now).
Lots of good ideas here but different strokes for different types of boats/construction.