What type of old brick is this?

[plan-g]

What type of old brick is this? Thin with grooves on one side.

It was under the plaster (as a plaster carrier?) on a house from the 1930s.

Was it common?

Is it worth trying to reuse or just throw away? I have a larger quantity left after an extension where we demolished a small section.

 

[Claes Sörmland]

Spiktegel. In this thread, people are looking for it:

https://www.byggahus.se/forum/threads/koepa-spiktegel.317994/

 

[plan-g]

Spiktegel. In this thread, people are looking for it:

[link]

Thank you.

In my case, it's nailed with the grooves facing outwards. Was that common?

 

[Claes Sörmland]

Thanks.

In my case, it is nailed up with the grooves facing outward. Was that common?

It's probably so that the plaster adheres better to the grooves? Presumably, it's part of the product.