Improved weatherproofing for sheet metal roofing

Details Improved weatherproofing for sheet metal roofing Improved weatherproofing for sheet metal roofing

E - Fixed Constructions

04

D

E04D 3/30 (2006.01) E04B 1/64 (2006.01) E04D 13/16 (2006.01)

Patent

CA 2242478

Combinations of inorganic corrosion-protection, passivating chemical treatment, and selected organic-type coatings of flat-rolled mild steel of selected thickness gauge and mechanical properties, provide for fabrication of composite-coated unitary sheet metal structures for lightweight and durable roof covering. Weathertight features with provisions for subsurface air circulation, free of liquid from precipitation, are provided by fabricating interfitting slot configurations on four linear sides of a viewable tab portion. Methods of fabrication provide for ease of assembly while providing configurations which compensate for barriers to entry of liquids where linearly-extending slots interfit during horizontally- extended assembly, and provide a horizontally-oriented appearance for viewable tab portions throughout a horizontally-extended assembly of unitary flat-rolled sheet metal roof covering structures.

Combinaisons d'une protection non organique contre la corrosion, d'un traitement chimique passivant et de certains revêtements organiques pour acier doux laminé ayant une épaisseur et des propriétés mécaniques précises. La fabrication de structures de tôle autonomes recouvertes de composite permet d'obtenir une couverture légère et durable. Une étanchéité aux intempéries ainsi qu'une circulation d'air de sous-surface, à l'abri des précipitations, sont obtenues grâce à des configurations de fentes d'inter-ajustement sur quatre côtés linéaires de pattes visibles. Les méthodes de fabrication facilitent l'assemblage, tout en permettant des configurations qui créent une barrière contre l'entrée de liquides où les fentes s'étendant linéairement sont inter-ajustées durant l'assemblage d'extension horizontale. Elles permettent aussi de créer une apparence d'orientation horizontale des pattes visibles dans l'ensemble s'étendant horizontalement des structures de couverture de tôle laminées autonomes.

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