Other Polystyrene Foam ???

ph1lthy11y

ph1lthy11y

Cummins hauls my ski to the water
Location
california
hey guys i think its time for me to re foam my ski but i have some questions on polystyrene i see some guys use pink polystyrene and some use white polystyrene are they the same ? the pink looks more smooth than the white wich is better for under the tray ? and were do you buy the pink foam my home depot sells the white but i dint see any pink... thanks
 
BombThreat

BombThreat

'Diggity
Location
Johnstown, NY
We used dock foam. We found a big chunk floating in the lake... Beat to hell but figured if it hasn't absorbed water by now I dont think it ever will... It was blue btw.
 
jloria

jloria

Location
Jacksonville, Florida
I went through a local company here in Jacksonville to buy EPS foam. I got lucky on this one...

It comes in different weights 1lb vs. 2lb etc...

They told me what home dept and lowes sell is actually called 'regrind'. It's much lighter, not as dense, and tends to break/flake off much easier.

The difference is pretty huge IMO when you compare them next to each other. It would be hard to capture the difference from a camera, you really have to see it in person.

The rep told me that the store bought will work but that the thicker EPS will hold up better and float more....

Here's the link:

http://www.royalfoam.us/
 
yamanube

yamanube

This Is The Way
Staff member
Location
Mandalor
If you are talking about the white foam like they use for packaging (like in a TV box or something) I would stay away from that. It is pretty tough if the original mold surface is not compromised but once you cut it, break it or wear through it, it will start to deteriorate pretty quickly.
 
ph1lthy11y

ph1lthy11y

Cummins hauls my ski to the water
Location
california
so i did so searching and found the differences in the foams
from the website


  • Polyisocyanurate (polyiso for short) foam has the highest R-value per inch (R-6.5 to R-6.8) of any rigid insulation. This type of rigid foam usually comes with a reflective foil facing on both sides, so it can also serve as a radiant barrier in some applications. Polyiso board is more expensive than other types of rigid foam.
  • Extruded polystyrene (XPS) rigid foam is usually blue or pink in color, with a smooth plastic surface. XPS panels typically aren't faced with other material. The R-value is about 5 per in. This type of rigid foam won't absorb water like polyiso and is stronger and more durable than expanded polystyrene, so it's probably the most versatile type of rigid foam. XPS falls between polyiso and expanded polystyrene in price.
  • Expanded polystyrene (EPS) is the least-expensive type of rigid foam and has the lowest R-value (around R-3.8 per in.). It's also more easily damaged than the other types of rigid foam.
rigid-insulation-board.jpg

now the part is finding some xps foam in socal the only home depot that has it is like 1 hour away :banghead:
 
Brian_216

Brian_216

Location
Harveys Lake PA
All of the RCW hulls feature XPS foam board under the tray. We use liquid foam on the top decks and seal it with glass. The foam board works very well, cut it and stand it on end and trim to fit. A home made hot wire cutter is simple to make.
 
VXSXH20

VXSXH20

Sionis Industries
Location
Mid-Atlantic
What about A POOL NOODLE, Whats that foam made up of? couldnt those be used if they were packed down in the tray? They are soft enough to bend and pliable? Kayak builders often use them? i've never seen one absorb water..
 
MCrider

MCrider

Location
Jackson MI
they will if they sit in water long enough, but if you installed drains i dont think it would be an issue.
 
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