Roof or floor coverings (5)

I believe the answer is:

tiles

(Other definitions for tiles that I've seen before include "Small oblong slabs used in roofing" , "Thin flat slabs of fired clay" , "Glazed rectangles used to cover walls or floors" , "Thin flat slabs, for roofing perhaps" , "Roofing materials" .)

I've seen this clue in The Guardian.

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