InterNACHI Wind Mitigation study materials

InterNACHI Wind Mitigation study guide

InterNACHI Wind Mitigation · Work through your exam, one topic at a time.

The How to Perform Wind Mitigation Inspections Course is a free, online training and certification course offered by InterNACHI® through its accredited college at internachi.edu. It is written for home inspectors and other individuals who conduct wind mitigation inspections and who need to learn how to complete the Florida Office of Insurance Regulation OIR-B1-1802 form (the 1802 form, or Wind Mitigation inspection form) for homeowners and insurers. The InterNACHI Wind Mitigation study guide has 12 sections and about 2,663 words.

Introduction

A Florida wind mitigation inspection is a visual, non-invasive survey of hurricane-resistance features that insurers use to rate wind coverage. The findings go on the Uniform Mitigation Verification Inspection Form, commonly OIR-B1-1802.

255 words, about 1 min 02

Buildings and wind

Wind produces positive pressure on windward walls, suction on leeward walls and roof edges, and uplift on roof surfaces. Gusts, not just sustained speed, drive damage.

215 words, about 1 min 03

Building envelope influences and damage

The building envelope includes roof covering, roof deck, walls, windows, doors, skylights, vents, soffits, and penetrations. Its job is to separate interior from exterior and transfer wind loads.

225 words, about 1 min 04

Windows, doors and gable end wall construction

Windows, doors, garage doors, skylights, and gable vents are openings in the envelope. Under wind load they receive pressure and debris impact.

225 words, about 1 min 05

Getting started and roof covering

Confirm the address, scope, and safe access. Photograph the house number and all elevations.

212 words, about 1 min 06

Roof deck attachment

Roof deck attachment describes how the sheathing is fastened to the trusses or rafters. The form separates wood-deck fastening by fastener and spacing: 8d nails at 6 in.

238 words, about 1 min 07

Roof-to-wall attachment

Roof-to-wall attachment transfers uplift from the roof framing to the wall. The form ranks metal connectors from strongest to weakest: double wrap, single wrap, clip, toe nail.

237 words, about 1 min 08

Roof geometry

The form distinguishes a hip roof from “other” roof geometry. A hip roof slopes down on all sides and has no vertical gable end.

226 words, about 1 min 09

Secondary water resistance

Secondary water resistance (SWR) is a layer under the roof covering that keeps water from reaching the deck if the covering fails. Common qualifying products are self-adhering modified bitumen meeting ASTM D1970 and closed-cell foam adhesive applied to the underside of the sheathing.

227 words, about 1 min 10

Opening protection

Opening protection covers windows, exterior doors, garage doors, skylights, and other glazed openings. To earn the “all openings protected” category, every exterior opening must have an impact-rated product or approved shutter system.

187 words, under 1 min 11

Photographs required

Photograph the address or house number, all roof elevations, the roof covering, roof-deck attachment with a scale, roof-to-wall connectors, SWR evidence, and opening-protection labels. Each photo should be clear enough for a reviewer to see the feature without guessing.

198 words, under 1 min 12