WordNet
covering material
n. a material used by builders to cover surfaces
Usage examples of "covering material".
Most of the top covering material on the plain is made up of rocks, ranging in size from pebbles to good-sized boulders.
The wood was covered in pinholes and here and there rusted metal pins still stuck out of it, attaching blackened shards which were all that remained of some covering material.
These were the places where we had melted down the rock cliffs for the purpose of obtaining our covering material.
The covering material had its own light as had that of the air car garage.