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Wind-Driven Rain at the Garage Door: Find the Entry Path

If rain reaches the garage, identify where it first appears while staying safely away from a moving door and wet electrical equipment. A wet floor alone cannot tell you whether a bottom seal, door joint or surrounding drainage is responsible.

Garage door equipment and design illustration

Distinguish the routes water can take

DASMA notes that wind-driven rain can enter at joints and perimeter edges, and water on the door may drip inside when it opens. Water flowing across the driveway and beneath the bottom is a different path. Describe the first visible wet area rather than calling every event a seal failure.

Include the surrounding opening

Roof runoff above the door can contribute to exposure. Ask the assessor whether the pattern points to the door assembly, the surrounding construction or drainage that needs another trade. A proposal should explain which entry path the work addresses.

Set a realistic repair objective

A sectional garage door should not be treated as a watertight flood barrier. Ask what the proposed correction can improve and what remains outside its scope. Do not increase closing force, fasten the door shut or add unapproved material to moving sections to chase a leak.

Your questions

Will replacing the bottom seal fix all rain entry?

No. A bottom seal addresses a particular boundary. Rain at joints, edges or the surrounding opening needs a different assessment.

Does a wind rating mean the door is waterproof?

No. Structural wind performance is different from resistance to every water-entry condition. Ask about the actual configuration and limits.

Sources & further reading
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