Static structures (e.g. – buildings) – Lapped multiplanar surfacing; e.g. – shingle type – Interfitted sections
Patent
1996-05-03
1998-03-24
Friedman, Carl D.
Static structures (e.g., buildings)
Lapped multiplanar surfacing; e.g., shingle type
Interfitted sections
52536, 52539, 52546, 52549, 52553, 525731, 52DIG5, E04D 112, E04D 134
Patent
active
057299471
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a covering and especially coverings for buildings, e.g. a covering for a flat roof.
At present most domestic flat roofs have a multi-layer-felt covering. The effective lifetime of such a covering is no more than fifteen years.
The present invention seeks to overcome the above problem and to provide a weatherproof covering which would have an expected lifetime of between thirty and one hundred years depending upon the materials and the working environment.
U.S. Pat. No. 4,930,282 discloses architectural tiles, e.g. of plastic, forming a roof or wall covering. Bottom tiles are arranged side-by-side with no special measures being taken to compensate for thermal movement thereof. Top tiles are also arranged side-by-side.
Furthermore, NL-A-7016713 discloses a covering comprising a bottom layer of sections defining a plurality of U-shaped channels and an upper layer of sections defining a plurality of inverted generally U-shapes which cover the gaps between the sections of the bottom layer.
According to a first aspect of the present invention there is provided a covering for an underlying structure comprising a bottom layer of sections defining a plurality of U-shaped channels and an upper layer of sections defining a plurality of inverted generally U-shapes which cover the gaps between the sections of the bottom layer, characterised in that at least the sections in the bottom layer incorporate means permitting movement thereof in response to both thermal expansion and thermal contraction.
Said movement is preferably in the plane of the covering; an advantage of this is that buckling is avoided.
The bottom and upper sections preferably comprise means for interconnection in the form of clip elements, e.g. in the form of hooks.
The arm portions of the U-shaped bottom sections preferably have outwardly extending flange portions having means permitting connection of the bottom sections to each other and to the underlying structure such as a roof deck.
The edges of the sections may be rendered flexible by an adjacent groove and/or the centre of the sections may have a longitudinal region folded in the manner of a letter Z to permit transverse flexing.
In arrangements according to the invention, the material of the bottom sections is selected from plastics material, sheet metal material, ceramic material or composite material and the material of the upper sections, irrespective of the choice of material for the bottom sections, is selcted from plastics material, sheet metal material, ceramic material or composite material. Sections of ceramic material can be conveniently interconnected by sliding and provide good heat shielding.
The present invention is at least partly based on the consideration that much deterioration of existing flat roof coverings is caused by restrained expansion and contraction, especially that resulting from rapid changes in sunlight and shadow.
According to a second aspect of the present invention, there is provided 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, 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, 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.
This provides a covering which is easily and quickly installed, but is then difficult to remove by pulling or twisting.
Preferred embodiments of the present invention will now be described by way of example only, with reference to the accompanying drawings, of which:
FIG. 1 is a perspective vie
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Friedman Carl D.
Skinner, Jr. Joel D.
Wilkens Kevin D.
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