How Much Weight Can You Float on EPS Foam (Aka Styrofoam Foam)? Expanded Polystyrene Bouyancy Chart 

Water weighs 62.6 pounds per cubic foot.. so, If the mean buoyancy number for foam is 51.5 lbs. that's 84% displacement weight. I needed that, Thank You.. I'm building an Air-boat with my 17hp lawn mower motor

Hi Dave. It is my pleasure to help. EPS will float 47-55 pounds depending on the quality of the manufacturer's equipment and the EPS raw material. 47 pounds is a safe number to use. On my Flotation Page you can find some examples of EPS floating structures and also a Bouyancy Chart for future reference.

Thats cool good to know, you should make Dinghies and Canoes out of the stuff bro. You know where i could get one and i buy one right now.

Hero. Thanks for the info!

Great video, love to see your passion! I just have a VERY small project I'm working on, custom floats for drones (mine currently is at the bottom of lake as I didn't have floats and it dropped out of the air like a brick, ha). Is styrofoam the best foam for flotation? I'm looking for the lightest foam product I can get to use as the drone is only 250g and the lighter the better.

i want to make the front end of my Suzuki samuria to have enuff buoyancy to lift or float or support aprox 500-750 lbs. we ride the river and sometimes hit a un seeable hole - which can occur. im trying to keep front end to from sinking. causeing water stress on electronics. the vehicle is snorkeled and fuel injected and diffs and tcase and tranny vented. but water around electronics can cause failure. if i can keep the front end up so back weels continue to churn i can get thru i can send you a picture of my sammy on ways or details how to do it - thanks monty walker - long story short i'm looking at eps foam for the answer in some fashion and made it look nice

Hello Dave, Based on your numbers you should be able to float between 1,765 lbs and 1942 lbs. Not bad. The weight of reinforcements, coatings, and passengers will have to be considered in this weight.

Thanks! Wow, 22k views.

I often thought it would be a good idea to mount Mobile Homes on blocks of EPS Foam in flood-prone area's. Fresh water and sewer connect could be coiled flexible tubing. The epoxy coating would protect the eps foam from degradation. Corner poles could be utilized to allow flotation, but keep the trailer in place. Might be able to make Million$ from this idea?

Question I’m having trouble finding out how to come up with the amount of floatation I will have with my pontoons they are going to be 16 inches wide by 8 inches tall by 7 foot long can tell me how to figure this please thank you for your time

I just realized that you are in Canada. What part?

If I use this for a bookcase on a wall will the cut foam ‘shelves’ hold the weight of the books?

THANKS FOR THE VIDEO! IM BUILDING A PONTOON BOAT :)

I am wanting to build a rock wall for the back of my aquarium using EPS foam. The foam will measure approximately 72" L x 24" T x (variable) 1.5" - 2.5" W. I'm thinking of using a silicone sealant to adhere it to the back of the aquarium but I'm also wondering how much weight it would require to sink the the bottom of the tank. Can you please help me with the math on this?

Hi, I need to talk to you about floating pontoons here in Bangladesh.

Do you know of a process of encapsilation that makes it possible to use polyurithane resin and fiberglass over EPS?

No laughing here sir. If you can see it, it can be done. If anyone is laughing, than they have not read Think and Grow Rich....wait what the hell am I talking about? If they are laughing its because they never read anything. Go for it brother!

So what about 48x28x6?

South African accent, right? :)

Yes sir. PlastiFab makes that product. They make a very good product and I think you will be happy with it. If you need bigger pieces, then I can help you find them. Please send me your zip code so that I can check my contact list for you.

how much would it be in kilos and cubic meters?

Hi .....I want to put 2 pieces of styrofoam each ....48 in. long by 6 in round ......on the sides of my kayak. Do think this will help it from tipping over sideways? Make easier to get in? Thanks.

So 1 square inch will handle 1.5lbs by that estimation?

I want to make something but i have no help at all and everyone doubt me . I am building a bike that going to be a shelter boat . Well im having not to much luck right now but i will build it . I could use some tips . And yes this is my real name so you can find me on face book .

If I wanted to use EPS as a spacer in a truck bed for a camper would this work and How thick would I need it to float 4500LBS? Truck bed would hold a completer 4x8 sheet. Thanks

Why didn't anyone in Huston do this with their cars?

what if all the hotel residents decide to have a giant pool party? they will all move to one end for the party, flip the hotel, and drown. you will get super sued and 500 people will die. what then?

Wow this video has me like💦😍