Covering

A covering for an underlying structure comprising a bottom layer of sections defining a plurality of U-shaped channels with gaps therebetween and an upper layer of sections defining a plurality of inverted generally U-shapes which cover said gaps between the sections of the bottom layer, wherein the sections in the bottom layer incorporate means permitting, in response to thermal effects, movement of the sections of the bottom layer relative to the underlying structure and means permitting, in response to thermal effects, movement of the sections of the bottom layer relative to each other, wherein the means permitting movement of the sections of the bottom layer relative to each other comprises a flexible edge.

A covering for an underlying structure comprising a bottom layer of sections defining a plurality of U-shaped channels with gaps therebetween and an upper layer of sections defining a plurality of inverted generally U-shapes which cover said gaps between the sections of the bottom layer, wherein the sections in the bottom layer incorporate means permitting, in response to thermal effects, movement of the sections of the bottom layer relative to the underlying structure and means permitting, in response to thermal effects, movement of the sections of the bottom layer relative to each other, the covering further comprising a plurality of clip elements which are arranged to be secured in a spaced array on the surface of said underlying structure, wherein the clip elements are arranged to receive the bottom sections and each comprise at least two spaced clip projections including limbs extending at least partly in a vertical direction, and the bottom sections comprise formations arranged to engage with the clip elements and corrugations having spaced portions extending at least partly in a vertical direction, wherein at least portions of said limbs of said clip projections are located directly adjacent to said portions of the corrugations whereby, after engaging said formations with said clip elements, opening of said clip elements to release the bottom sections is resisted.

A covering comprising at least one layer of sections arranged to be secured to a structure by means of a spaced array of clip elements, wherein the clip elements each comprise at least two spaced clip projections including limbs extending at least partly in a direction generally perpendicular to the structure when secured thereto, and the sections comprise formations for engaging with the clip elements and corrugations having spaced portions extending at least partly in a direction generally perpendicular to the structure when secured to the clip elements, wherein at least portions of said limbs of said clip projections are located directly adjacent to said portions of the corrugations whereby, after engaging said formations with said clip elements, opening of said clip elements to release the section is resisted.