What's the procedure for installing a gooseneck (hood) for an outside air intake

Plain-English answer

Mount a secure, flashed curb box on the roof deck.

Fasten the gooseneck throat flange to the curb structure using stainless steel fasteners.

The open intake mouth of the gooseneck must point downward at a sharp angle to prevent driving rain from entering.

Install a rigid 1/4-inch mesh bird screen (galvanized or stainless) across the open face of the mouth to prevent pests from being sucked into the ventilation stream.

Field checklist

• Stop and verify the approved detail, manufacturer instructions, foreman direction, and project specs before touching it.
• Mount a secure, flashed curb box on the roof deck.
• Fasten the gooseneck throat flange to the curb structure using stainless steel fasteners.
• The open intake mouth of the gooseneck must point downward at a sharp angle to prevent driving rain from entering.
• Install a rigid 1/4-inch mesh bird screen (galvanized or stainless) across the open face of the mouth to prevent pests from being sucked into the ventilation stream.

Ask Foreman

Verify before acting

Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.

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