EPS

Other Names:

Expanded polystyrene

Description:

Polystyrene foams come in a number of different types basically expanded (EPS) or extruded (XPS). The standard white foam used for insulation is open cell EPS. The slightly more dense (heavy/strong) blue and pink foams also used for home insulation are closed cell EPS. Open or Closed cell refers to the structure. In particular open cell foam soaks up all fluids, water, glue whatever like there's no tomorrow. Closed cell takes a lot less glue and is much easier to waterproof. All of these types generally come in large blocks and are cut to shape to form wings etc.

Advantages:

Light and cheap.

Disadvantages:

Brittle, that is, doesn't take the knocks that EPP will survive.

Handling:

Can be sawn, cut with a knife or hotwire cut. Fumes are not nice!

Suppliers: