E04D 1/22

Roofing elements shaped as plain tiles or shingles, i.e. with flat outer surface of specified materials {not covered by any one of groups [CPC: E04D1/14] - [CPC: E04D1/205]}, or of combinations of materials, {where at least one is} not covered by any one of groups [CPC: E04D1/14] - [CPC: E04D1/205]