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Hello everyone, I bring you an explanation video, I suppose everyone already knows what extruded polystyrene is, for those who don't know, I have recorded this video explaining what it is, how it is used and where to buy. Greetings and I hope it helps you!!

Isn't it styrofoam? That is what I got for modeling instead of anything poly' do note that poly (meaning 'many') consists of pressed together little balls which are a hell to work with (especially to get rid of) and styrofoam is solid. Styrofoam is generally used in construction (housing) so going by any construction site and asking for leftover Styrofoam gets you free Styrofoam for your projects, that is how I got mine.

Extruded polystyrene for hobby applications, at least in the US, tends to be insulation foam sold at DIY stores (Home Depot) in large sheets. Usually used for wall insulation.

They come in different thicknesses and can be cut with box cutters or hot wire cutters, or even hobby knives (the latter is tough to do, and dulls blades quickly). Hot wire cutters require good ventilation as the melting foam is toxic.

There are tons of YT videos (check Black Magic Craft as an example) of things you can do with it. At its most basic, making modular hills. With a hot wire cutter, whatever you can think of.

If memory serves, Styrofoam is actually also polystyrene but "expanded" rather than "extruded".

It’s a pretty handy building material for terrain.

Whilst not the toughest material, it’s lightweight, and easy to carve surface detail into. And for making say, a ruined chapel? You can cut and carve the walls as whole pieces, then break it down with a hot wire cutter.

You can protect it against the rough and tumble of gaming with textured paint over the top.