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Old 26 April 2009, 10:33   #1
Country: Canada
Town: Nova Scotia
Boat name: Thumper
Make: SeaBright
Length: 4m +
Engine: 9.9 Mercury petrol
Join Date: Apr 2009
Posts: 1
SIB floor insert project...

I have a SeaBright 380 SIB {12ft} with an aluminum floor but I'd like to reduce the weight and add a degree of comfort by replacing the floor with a V shaped insert made from a foam core sealed with fibre glass and gel coat.

Has anyone gone down this path ?

The standard aluminum floor gives the rigidity, but it's hard on the knees when you want to stay low in the boat, so an insert as described above, with a top cover of low density closed cell foam as a cushion should be an improvement in comfort, less weight in the boat without any loss of rigidity, and with a greater degree of comfort on the deck.

Other than the above, here's a link to the SeaBright web site, not sure how their prices compare to prices in the UK...

Canada Bob

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Old 27 April 2009, 00:07   #2
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,622
You're talking about your weight, on about 2 x what, 8 square inches (knee contact area), at whatever rate it's slowed by the flooring. I doubt low density foam is going to make any difference at all. You should probably be looking more along the lines of a solid rubber material.


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Old 27 April 2009, 01:16   #3
Country: Canada
Town: British Columbia
Make: Gemini
Length: 4m +
Engine: 40hp 2 str
Join Date: Oct 2003
Posts: 2,151
I'm not sure why you don't just get some high density foam padding to place on top of the aluminum floorboard where you would be kneeling or sitting.
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Old 27 April 2009, 04:02   #4
m chappelow's Avatar
Country: UK - England
Town: yorkshire
Boat name: little vicky
Make: avon ex RNLI
Length: 3m +
Engine: tohatsu
Join Date: Mar 2008
Posts: 2,310
i have a foam mattrass that came with my old inshore lifeboat ,its 2inch thick closed cell foam bit like neoprean wet suit material with a hypalon face on one side , bit on the heavy side but great if out in lumpy seas,also makes the boat feel more solid ,no rattles or creaks ,it can be used as a floatation raft if needed too ,the cut out down one side is for the sausage flexi fuel bladder to fit in , regards mart.
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Old 22 May 2009, 09:35   #5
Country: Canada
Town: Toronto
Length: 3m +
Engine: Yamaha, 15hp, 2str
Join Date: May 2008
Posts: 71
I would say go to Home Depot. For 50$ you can get Professional Gel Knee Pads.
And less weight in the boat is not always a good thing.
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