Rigid Polyurethane Foam sheets

Chiorino

Hi folks, would anyone have any idea where I can get sheets of rigid PU foam. It's to be glassed as part of a project I'm doing and the crowd I normally get it off don't have any for the forseeable.Thanks

fergal.b

Hi, B&Q do the pink and blue foam insulation sheets might be worth a look and if not try kingspan they should have it.

Slig

I know that boat builders have been using PU foam for years but it really isnt suitable for use in damp environments. The stuff absorbs water over time and degrades with exposure to moisture.

I have been looking at this from the construction point of view and I would always specify the older Polystyrene (white beads) over PU in any potentially damp location.

Chiorino

Slig wrote: »

I know that boat builders have been using PU foam for years but it really isnt suitable for use in damp environments. The stuff absorbs water over time and degrades with exposure to moisture.

I have been looking at this from the construction point of view and I would always specify the older Polystyrene (white beads) over PU in any potentially damp location.

I considered using that but would be afraid of the resin eating the foam. Have you ever had problems with this?

fergal.b

Can you tell us a bit more about what you are trying to do. If you want it for floatation then a closed-cell foam like this will do http://www.insulationireland.net/foam_board.htm without the need to coat it in resin. As foam is not solid if you coat it in resin the slightest bit of pressure will crack the resin unless you use a fiberglass cloth and coat with resin.

Chiorino

fergal.b wrote: »

Can you tell us a bit more about what you are trying to do. If you want it for floatation then a closed-cell foam like this will do http://www.insulationireland.net/foam_board.htm without the need to coat it in resin. As foam is not solid if you coat it in resin the slightest bit of pressure will crack the resin unless you use a fiberglass cloth and coat with resin.

It's to form two moulded in seats which will then be covered in a couple of layers of cloth and resin.

fergal.b

Ok one way to do it no matter what what foam you use is to cover the foam in cling film then the resin wont affect it, put it on in light coats so the chemical reaction wont heat up too much when it's setting.