Mechanical · M-5W8CX

Galvanized Steel Hood and Pipe Penetration at Roof Curb

Materials

Steel

Elements

Roofs Decks Arches Waterproofing / Flashing Insulation Site / Paving Roof / Floor Openings

Connections

Welded Connection Bolted Connection Deck Attachment

About this detail

A sixteen gauge galvanized steel hood with welded watertight joints protects a piping penetration through a roof assembly. The insulated piping routes through a roof curb with a twelve inch minimum forty-five degree opening in the deck matching the curb inside diameter. The hood secures to the curb using one-half inch stainless steel lag bolts with a minimum of two per side, and silicone sealant is applied into holes prior to inserting bolts. Voids are filled with urethane foam insulation around the support lip and pipe insulation. Jacketing wraps the elbow, and the assembly coordinates with architectural drawings for the roof curb, roof insulation, flashing collar, and sealant.

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