So don’t trust me. Right and wrong places. I am not being a smart as_. There is no other room for styrofoam. NOTHING in the bottom 1/2. Flotation styrofoam for starcraft. Keep all the foam block or spray in place in the TOP HALF of hull. I've got a 20' aluminum with a 115 hp 4 stroke on the back that just makes it seem a bit back heavy. Top. ( calculated using weight in the air of 1000 lb). PLEASE LEAVE A LIKE IF YOU ENJOYED!!! NOODLE FACTS I was looking to get a 20 foot skiff built. I need all the feedback I can get from you guys!!! I shopped around at three different places and checked out what they had to offer. Flotation foam for Boats. T hus, in the larger boat, especially those having many items of dense, heavy materials, other approaches to preventing sinking are resorted to. I have a boat that does not have enough foam to suit me in case it gets swamped. My only option is to use the spray in foam, it has the lining inside of the the cross bars and the floor is covered with the checked plate aluminum. Correction, Keep it all in the top half. In the spring and early summer, we receive a volume of inquiries from folks with older boats wanting to install or replace foam for flotation. The slip can be entirely enclosed, or space can be left—as a 45-degree “V” or square end—in the fill-in for smaller watercraft docking. It is a 15 foot aluminum jon boat with plenty of open space in the front and on the sides to add foam. This customer in Buford, GA purchased 4 blocks of 1 lb density EPS 6” x 24” x 72” and cut them to fit in the hull of his row boat. The outside edges of the pods are angled to match the angle of most jon boat gunnel walls. They’re a staple on duck hunting boats and common on many other aluminum boats including catfish boats. Pods are to be welded or bolted to stern of the boat. I am thoroughly pleased with my boat and Bobby and Lynn are really nice people. I'm tempted to have a couple of flotation pods welded onto the back, but have reservations of how that affects handling, speed, and ride. I found one other place that had the same quality to offer but for $2,000 more for the same boat. If I add styrofoam in the middle under the floor it will only add 300 lb of floatation. Boat weight in the water is 600 lb. There are 2 ways to put foam flotation in the boat. The choice was easy. B = Buoyancy of flotation material in pounds per cubic foot. This is on a used boat that has bin in salt water, not new aluminum. Anyone have any good/bad experience with flotation pods added to the rear of an aluminum boat? If one were to add enough flotation material to do the job, there could be a substantial loss of accommodation and storage space, perhaps even making the boat impractical to use. I am replacing floors in 1973 16 foot aliminum starcraft (70 h.p. Small – Fits 12 to 16ft boats with boat width 48" or less. However, it is possible to add some additional, low-cost buoyancy to the hull and greatly improve your chances of surviving a flip with almost no water ending up inside the boat. Copy from a new boat that has VERY same layout as yours.----- If at all possible. CTMD Posts: 276 Fill-ins are available for any size Flotation Systems slip, and are custom-made to suit your application. (or kg per cubic meter) G = A percentage of the weight of Machinery (engines, sterndrives, outboards, etc., usually 75%) For Outboards See Appendix A at the end of this lesson. I was wondering about how to prep a aluminum boat that was to be foamed to insulate/sound deaden/add floatation so as to not create the same problems the gas tanks in sea rays had? Johnson outboard). The pods extend beyond the transom and add extra floatation to lift the back end up out of the water which is the heaviest part of the boat. 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