Static structures (e.g. – buildings) – Lapped multiplanar surfacing; e.g. – shingle type – Interfitted sections
Patent
1985-05-14
1987-03-24
Friedman, Carl D.
Static structures (e.g., buildings)
Lapped multiplanar surfacing; e.g., shingle type
Interfitted sections
52550, E04D 100
Patent
active
046514910
DESCRIPTION:
BRIEF SUMMARY
This invention relates to roofing systems.
In recent years the importance in any roofing system of providing adequate ventilation of the interior roof space has been widely recognised, and experience has shown that in the absence of sufficient ventilation condensation can cause premature deterioration of the rafters and other roof components. Thus, in modern roofing systems various means are generally provided to promote the flow of air from outside the roof to within the interior roof space. For example, in roofing systems comprising tiles, slates or other such individual units it is known to provide a number of so-called ventilating tiles, i.e. a tile provided with one or more ventilation apertures through which air may flow to the interior roof space. Traditionally such tiles usually include a protective eyebrow shaped hood which overlies the ventilation aperture to prevent the direct entry of rain water into the roof space, and a grill or mesh typically covers the lower, open end of the hood which might otherwise provide access into the roof space for birds or insects.
However a problem with ventilating tiles is that airborne water droplets or fine snow flakes may be carried by the airstream into the roof space via the tile ventilation apertures, a grill or mesh generally being ineffective to collect such droplets, and over a period of time this can result in a considerable amount of moisture entering the roof space. This is undesirable and again can cause premature deterioration of the roof components.
Viewed from a first aspect the invention provides a roofing system including a weathering member which underlies a tile, slate or like unit having a ventilation opening, said member having an aperture which permits air flowing through said ventilation opening to enter the underlying roof space, said aperture being spaced from the ventilation opening and being shielded therefrom by an upstanding ledge of said member.
In a roofing system in accordance with the invention, the weathering member aperture permits air flowing through the tile ventilation opening to enter the roof space. However, any airborne water droplets or snow flakes impinge either directly on the weathering member or on the upstanding ledge which shields the aperture from the ventilation opening, and are thus collected by the member. The weathering member is preferably adapted and arranged to drain water collected thereby onto the upper surface of a tile in the adjacent lower row of the system.
Preferably the weathering member is in the form of a tray which is secured at its upper end to a tiling batten of the system. The trailing edge of the member is preferably contoured to match the shape of the upper surface of a tile in the adjacent lower row and is supported by such tile.
It is desirable that the upstanding ledge forms at least an approximate seal with the underside of the overlying tile or slate, and in one embodiment, at least the upper part of the upstanding ledge is formed of a resilient material such as foam which engages and shapes itself to the underside of the tile and thus forms an approximate seal therewith, regardless of how the tile may be contoured. In an alternative embodiment, where the underside of the overlying tile is contoured, a filler portion may be secured thereto which engages over the upper part of the ledge. Advantageously the weathering member further comprises an upstanding flange which extends around the aperture and forms a kerb which reduces the possibility of water collected by the member running into the roof space. The weathering member may conveniently be formed from a plastics material by a vacuum moulding technique.
Viewed from a second aspect the invention provides a weathering member for a roofing system adapted to underly a tile, slate or like unit having a ventilation opening, said member having an aperture adjacent one end thereof which in use permits air flowing through the tile ventilation opening to enter the roof space, and an upstanding ledge adjacent said aperture adapted in use to shie
Friedman Carl D.
Marley Tile AG
Slack Naoko N.
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