Does anyone know what these roof panels are called?



It's a 1960's / 70's steel frame, with a traditional felt roof, but I'd like to know what the name, or what they are made of. They look like some sort of insulated fibreboard.

Thanks

IIRC they are wood shavings coated in cement type stuff. Very popular in 60s tech colleges.
Sorry, can't remember what it's called.

Sometimes known as 'strawboard'.

Trade name is Stramit.

Bit difficult to see but they could be Stramit boards, which were made from compressed straw and cement, they were quite interesting when they first came out, as if they got wet sometimes the corn trapped in them would grow. Later they were heat treated to try to kill of the corn, but with a sometime result. HTH Ray

Thanks everyone!

I've seen them swell when they get wet, but never grow!

Cheers