there's a similar post here: www.ultimatehandyman.co.uk • View topic - Anyone know what this is?
took em a lot longer to suss it out though!
this is called K-Lath we used to use it as DAMP-PROOF MEMBRAIN !! so be carefull there will be rising damp or damp behind it!!
nope sorry thats not k-lath...that is newtonite lath used in the old days for tanking