Foam Transon, Opinions

[Reel Smoker]

Most of the boat builders these days use no wood on there transoms, they use the divinicell ( is this how its spelled) Whats your opinion of these boats putting a bracket and twins. I dont know if the foam could take the weight of this motors.My concern is the washers working thru the glass and eventually thru the foam. Is this possible? How dense are these foams?Any opinions would be greatly appreciated.

[warthog5]

They are very dence. 13lbs cuft and higher. When installing any bolt on piece with a foam core you should follow these instructions. I do it for wood core also.
http://bertram31.com/proj/tips/sleeving.htm

[FELLOW-SHIP]

Ha Reel Smoker
I just posted a comment on “Foam Filled Transoms” on the Fiberglass Boat building Books thread for you. I guess you were referring to the sheets of composite materials and not a “bucket of foam” you mix and then pore into the transom between the two walls of fiberglass after removing the plywood lamination between. For the sheets of composite materials that most of the boat manufacturers are using now a days personally I think that that’s the way to go I would add extra layers of fiberglass on both inside and outside walls just be beef it up a little like to 3/8” or so.
FellowShip [img]/images/graemlins/wink.gif[/img]

[Reel Smoker]

Warthog,thanks for posting that info, very interesting.I might be having a boat built and the weight is one thing that I was concerned about,I like the idea of the sleeve.
Felloship,yes I was refrering to the sheets.When I knock on my transom(wood) obviously it feels solid yet you knock on a boat with a foam full transom and it sounds like theres not much there. It just makes me wonder how strong this stuff really is.But I agree, thick layers of glass on both sides should should give it the strengh AND PROTECTION FROM THE BIG WASHERS WORKING THERE WAY THRU THE FOAM. Thanks RS.