What does roof geometry mean on a wind mitigation inspection?

Roof geometry refers to the shape of the roof and how its slopes are arranged. Inspectors classify the roof as hip, gable, flat, or other shapes to determine eligibility for wind mitigation credits.

Which roof geometry provides the strongest wind mitigation discount?

Hip roofs provide the strongest wind mitigation discount because they have fewer flat surfaces exposed to wind uplift. Homes with hip roofs typically receive the highest geometry credit on the wind mitigation form.

How do inspectors determine if a roof qualifies as a hip roof?

Inspectors measure the total perimeter of the roof and calculate the percentage that is hip. To qualify as a hip roof, at least 90% of the roof perimeter must be hip. Any gable or flat sections reduce the percentage.

Do gable roofs qualify for wind mitigation credits?

Gable roofs do not qualify for the hip roof credit, but they may still receive other wind mitigation discounts such as roof covering, roof deck attachment, or opening protection. Gable end bracing does not affect the geometry credit.

Does a flat or low-slope roof qualify for wind mitigation credits?

Flat or low-slope roofs do not qualify for the hip roof credit. However, they may still receive other wind mitigation discounts if the roof covering, deck attachment, and opening protection meet Florida Building Code standards.

Florida Roof Geometry Wind Mitigation Guide

Roof geometry is one of the strongest wind mitigation credits on the Florida inspection form.

How Roof Geometry Is Graded on the Wind Mitigation Form

Inspectors classify the roof shape using the OIR‑B1‑1802 form. The form evaluates the entire roof system perimeter and determines whether the home qualifies for the hip roof credit. Roof geometry is one of the most valuable wind mitigation credits because roof shape directly affects wind performance.

Roof Geometry Options (Florida OIR‑B1‑1802)

Option A – Hip Roof (Best credit):
A hip roof with no other roof shapes greater than 10% of the total roof system perimeter.
Inspectors record:
• Total length of non‑hip features
• Total roof system perimeter
(Matches: “Hip roof with no other roof shapes greater than 10% of the total roof system perimeter.”)
Option B – Flat Roof (Multi‑unit buildings only):
A flat roof applies only to buildings with five or more units where at least 90% of the main roof area has a slope less than 2:12.
Inspectors record:
• Roof area with slope less than 2:12
• Total roof area
(Matches: “Roof on a building with five (5) or more units… slope less than 2:12.”)
Option C – Other Roof:
Any roof shape that does not qualify as Hip or Flat.
This includes gable roofs, combination roofs, and any roof with non‑hip features exceeding 10% of the perimeter.
(Matches: “Any roof that does not qualify as either (A) or (B).”)

Hip vs gable roofline comparison for Florida wind mitigation

Which Roof Geometry Gets the Best Credit?

On the Florida wind mitigation form, Option A (Hip Roof) receives the strongest credit. Hip roofs perform better in high winds because they have fewer flat surfaces and reduced uplift exposure. Homes with hip roofs typically receive lower premiums compared to homes with gable or combination roofs.

Why Roof Geometry Matters for Insurance

Roof shape plays a major role in wind performance. Hip roofs distribute wind loads more effectively, reducing the chance of structural damage. Carriers reward this with stronger wind mitigation credits. If your home has a gable or combination roof, you may still qualify for other credits, but roof geometry remains one of the most impactful factors.

If you have a wind mitigation report and want to know how your roof geometry affects your premium, I can review the form and apply all eligible credits across multiple Florida carriers.

Wind Mitigation Knowledge Center

Explore detailed guides for each wind mitigation feature:

For personalized quotes with all eligible wind mitigation credits applied, visit our
Florida Homeowners Insurance Quote Page.

Disclaimer: This guide reflects my interpretation of the Florida wind mitigation inspection form for the purpose of applying insurance credits. It is not a substitute for a licensed inspection. If you need clarification on any construction feature, material, or compliance item, please consult a licensed Florida home inspector or contractor.

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