Metal roof sealing system and method

E - Fixed Constructions – 04 – B

Patent

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Details

E04B 7/00 (2006.01) E04D 3/38 (2006.01)

Patent

CA 2264800

A sealing system and method for a metal roof (1) having a plurality of sheet metal panels (4) attached to a roof deck (2) covered by a layer of insulation (17), such as polystyrene. The joints and seams (10) formed at junctions of adjacent panels are sealed with a non-flammable or low combustible, char forming, non-absorbent layer of material (20, 23) which is applied over the seams in a liquid or slurry form, which subsequently hardens to form a liquid proof seal to reduce the flow of molten polystyrene from melting of the adjacent layer of insulation, into the fire below.

L'invention concerne un système et un procédé d'étanchéité pour un toit métallique (1) constitué d'une pluralité de panneaux (4) de tôle fixés sur une sous-toiture (2) recouverte d'une couche d'isolant (17), tel que du polystyrène. Les joints et les agrafures (10) formés au niveau des raccords de panneaux adjacents sont colmatés au moyen d'une couche de matériau (20, 23) non absorbante, carbonisée, ininflammable ou à faible combustion, que l'on applique sur les agrafures sous forme liquide ou en bouillie. Cette couche se solidifie ensuite pour former un joint d'étanchéité imperméable aux liquides qui permet d'une part de réduire l'écoulement de polystyrène fondu au travers de la couche d'isolant adjacente et d'autre part d'empêcher que cet écoulement ne tombe sur le feu situé au-dessous.

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