So we've taken out an old bath in the new house that we've bought. House was built in 1974 and this is the second wall that we've come across that is made of straw. That's right. Straw. What on earth are you supposed to cover it with. The wall that is exposed is behind the bath. Do we need to seal it with something before we plaster it and what kind of plaster should we be using. Concerned that the straw is exposed in a bathroom which means alot of moisture will be in the air and I'm concerned that if the straw gets damp in any way then it will rot. Does anyone know what to do in this situation please?