foam

[brokensheer]

Here in the USA i am looking for some 4-5 lb density and some 8lb density foam, many of the supplier plain don't have it, or its crazy expensive, can anyone point me in the direction of good stock and pricing

[PAR]

Having something in stock, in an economically weak climate is asking for a lot, especially if it's a product you don't move a much of.

What type of foam are you looking for, pourable, sheet, closed cell, material choice, etc.? Try www.FGCI.com

[rasorinc]

look at styrofoam byoyancy billets, solid non water absorbsion, float 55 lbs. per cubic foot.. Compatable with epoxy. I have had them under a floating dock for 35 years W/O any damage except muscat rat bites. I have a supplier who will cut them to any size for you and they are inexpensive. They must be protected from the sun. I use them in all boats I build. They never absorb water. Stan They have fcilities all over the US with home in msryland.

[brokensheer]

I am looking for sheet foam. 1 " and 1 1/2" in 4x sheets

[marshmat]

Sheet foam as in extruded closed-cell polystyrene (Styrofoam)? That stuff is fairly easy to find if you forget the marine market and look at industrial building supply outlets that target the construction industry. House insulation Styrofoam and dock float Styrofoam are essentially identical.

Or are you looking for the flexible closed-cell sheet foam used for lifejackets and floating cushions? Or maybe a flexible insulation foam such as Armaflex?

Knowing the application would be pretty helpful....

[mikereed100]

I have been buying from Noah's in Ontario for years. Prices are good and they will ship to the US (or anywhere in the world). They usually have Corecell offcuts for 50% off.
http://www.noahsboatbuilding.com/noahusa/index.asp?FSCat=2&url=IND&iFromFeatured=1

Mike

[PAR]

Again what kind of foam are you looking for Brokensheer? Do you know what kind of foam you're looking for? If not describe what you're using it for and we'll attempt to guess . . .

[SamSam]

This sort of foam is widely available at roofing supply places at commercial roofing prices. Sometimes returned stuff with slight damage or overstocked stuff is available dirt cheap.

http://www.elliottfoam.com/features.html

[brokensheer]

I am loking for something like corecel, divinicel, I need a 4x8 sheet of atleat 8lb density 1 1/2 thick, and 4x8 material of at least 4lb density at 1" thick it will be used for stringers , bulkheads and walking flats,, sorry for the delay in info PAR

[anchorman]

I am a new member to the site and need some knowledge on this same subject. I have a 17' aluminum jon boat I am about to floor and am adding xps foam sheathing for flotation. I've been all over the net and am getting an education on closed cell vs. open cell insulation ! WOW ! It's enough to make your head spin ! The ribs in the boat are 1 5/8" high , boat width 48"s, space between ribs 10 1/2" s. If I go to Lowe's or Home depot what should I look for. I see stuff called polystyrene at lowes. Haven't been Home depot yet.
I fish the jetties alot at Georgetown, SC. Very dangerous . I need flotation.
You guys look like you know exactly what you're talking about.
Your input would be greatly appreciated.

[yipster]

floating, insulation and sandwich foam can be all styrofoam? i was looking at newer high density package materials wondering if they come in sheets and can be used for stich and glue

[marshmat]

Brokensheer,
Corecell, Divinycell, Airex, etc. all tend to be rather on the pricey side. You get what you pay for. Finding a place that will sell you such a small quantity at a good price might be difficult, it's not at all uncommon to be quoted well north of a hundred bucks a sheet.

anchorman,
XPS stands for eXtruded PolyStyrene, the exact same stuff that is sold as blue or pink polystyrene insulation board at the hardware store. Not to be confused with EPS (Expanded PolyStyrene), ie. packaging foam. Both types are sometimes called by the brand name Styrofoam. XPS makes great flotation and insulation, but should not be used as a core foam (it cracks apart easily under shear stress). EPS has no place on a boat, as the granules tend to disintegrate after a year or three and clog up limber holes and bilge pumps. Both can trap water in undesirable locations, leading to corrosion and mildew.

[yipster]

EPS has no place on a boat, as the granules tend to disintegrate after a year or three and clog up limber holes and bilge pumps. Both can trap water in undesirable locations, leading to corrosion and mildew.
have 2 component low and high density polyurethane foams that do that too
Divinycell is great but expensive, will check on xps, thanks

[Jimbo1490]

EPS has no place on a boat, as the granules tend to disintegrate after a year or three and clog up limber holes and bilge pumps. Both can trap water in undesirable locations, leading to corrosion and mildew.

I used to believe that the nominally 1.5 and 2.0 lb/cu ft density EPS(actually 1.25 and 1.75 lbs cu ft respectively) were the only grades of EPS in existence, and yes they are totally worthless as structural material and they barely hold together.

But a custom packaging manufacturer was kind enough to send me a large box of molded samples of EPS in densities all the way to 15 lbs/cu ft! That stuff was plenty strong and durable, and if someone bothered to make it in sheets, I'm sure it would find its way into many composite projects.

But nobody does prob'ly cause it would cost about the same as PVC foam to manufacture, but I'm not sure of that. After all, it is used as disposable packaging.


Jimbo

[yipster]

1.5 and 2.0 lb/cu ft density EPS(actually 1.25 and 1.75 lbs cu ft respectively)

But a custom packaging manufacturer was kind enough to send me a large box of molded samples of EPS in densities all the way to 15 lbs/cu ft! That stuff was plenty strong and durable, and if someone bothered to make it in sheets, I'm sure it would find its way into many composite projects.

But nobody does prob'ly cause it would cost about the same as PVC foam to manufacture, but I'm not sure of that. After all, it is used as disposable packaging.

Jimbo
thats what i meant Jimbo have some samples saved laying around, no poly but epoxy glued that seem to be workable and stay good
btw 2.0 lb/cu ft density EPS translates to XPS vol weight 45 kg/m3 whith a short pressure time of 700 kPa to long term 250 kPa i belive
still checking

[apex1]

But nobody does prob'ly cause it would cost about the same as PVC foam to manufacture, but I'm not sure of that. After all, it is used as disposable packaging.
Jimbo

These insulating elements suited for efficient insulation under screed and for floors with underfloor heating with low thickness are the stuff you are talking. These are high density EPS panels, pretty common in Europe.

Richard

[yipster]

googled "high density EPS panel" and a bit further but got flabberghasted
bedazzling whats on the marked worldwide, marked some as perhap$

foam core is becoming more and more prevalent in boat building,
with new formulations and applications being created every day (http://www.boatdesign.net/articles/foam-core/index.htm)

[apex1]

Look for EPS 035 >= 200 kPa, or EPS 40 5kn m²
or
Styrofoam HD 300
the latter is XPS, with 52kg m³