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Right – Hurricane strapping attaches every roof truss to a wall stud.

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Retrofit of Existing Roofs for Hurricane, High Wind, and Seismic Resistance

Guide

Guide describing ways to retrofit an existing roof to increase its resistance to damage during hurricanes, high winds, and earthquakes.

Hurricane-New Construction Roof Deck Attachment, Structural Wood Panels

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Hurricanes, Earthquakes & Tornados - Design of Wood-frame Structures for Extreme Forces

Video

Video presentation describing wood framing design to withstand extreme forces from severe weather.

Example A of a gable truss and gable end wall bracing for a home in a hurricane region

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Example B of a gable truss and gable end wall bracing for a home in a hurricane region

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Failure of Roof Structure from Pressurization Due to Window Failure During a Hurricane.

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Hurricane Mitigation Retrofits for Existing Site-Built Single-Family Residential Structures

Reference

Code describing the requirements for existing site-built single-family homes to receive roof-to-wall retrofits when re-roofing.

Metal Roof Systems in High-Wind Regions - Hurricane Ike Recovery Advisory

Reference

A Recovery Advisory guide reccomending practices for designing and installing metal roof systems that will enhance wind resistance in high-wind regions (i.e., greater than 90-miles per hour [mph] gust design wind speed).

Building Performance: Hurricane Andrew In Florida - Observations, Recommendations, and Technical Guidance, FIA 22

Reference

Document containing recommendations on how to brace roofs and gable end walls based on lessons learned from analyzing the destruction from hurricane Andrew.

Hurricane-Prone Regions of the United States with ASCE 7-05 and 7-10 Boundaries

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Right - The wall framing is connected to roof framing with metal ties for hurricane-resistant construction.

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Failure of barrel tile roofing due to bond failure between underlayment, mortar, and tiles during a hurricane.

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End wall failure under hurricane force winds due to inadequate bracing of the gable end wall.

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Right - Correct angle for installing an engineered structural screw to secure a rafter to a wall for hurricane resistance.

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Bolted metal hurricane strapping ties the roofing to the framing and the framing to the foundation walls for resistance to high winds.

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FEMA Best Practices for Minimizing Wind and Water Infiltration Damage - Hurricane Michael in Florida, Recovery Advisory 2

Reference

A recovery advisory guide presenting important recommendations to reduce wind and water infiltration damage to new and existing residential buildings.

Right – Taping the roof sheathing seams can greatly increase the likelihood of water infiltration into a home in the event of a hurricane.

Right – Taping the roof sheathing seams can greatly decrease the likelihood of water infiltration into a home in the event of a hurricane.

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Failure of extruded concrete flat tile roofing due to bond failure between tile, mortar, and underlayment resulting from hurricane force winds.

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This roof is hurricane proofed with a coated insulated OSB deck sheathing that is caulked and taped at all seams with a water-resistant tape, then fully covered with a peel-and-stick membrane, and asphalt shingles.

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Wrong - Toe nails in roof truss are set too low in framing bracket and hurricane strap is set too high so lower nails don't hit lower 2x6 of top plate.

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Right - An unvented attic with no soffit vents, borate-treated fascia board, metal drip edge, and concrete block construction on this south Florida home help make it resistant to hurricanes, pests, and wind-born wildfire embers.

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Right – This hot-humid climate home employs several hurricane- and termite-resistant features including concrete block construction, borate-treated framing, a hip roof design with metal drip edge, impact-rated windows, and an unvented attic.

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Climate-specific features include bug- and moisture-resistant concrete block construction and borate-treated interior framing; a hurricane-resistant spray-foamed hip roof; and ventless roof soffits to keep out wind-driven rain.

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Buildings damaged by a hurricane storm surge: upper homes on gulf shoreline were hit by large waves above the lowest floor, lower left home on bay and right school 1.3 miles from gulf shoreline were hit by surge and small waves.

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Right – Hurricane strapping attaches every roof truss to a wall stud.

Retrofit of Existing Roofs for Hurricane, High Wind, and Seismic Resistance

Hurricane-New Construction Roof Deck Attachment, Structural Wood Panels

Hurricanes, Earthquakes & Tornados - Design of Wood-frame Structures for Extreme Forces

Example A of a gable truss and gable end wall bracing for a home in a hurricane region

Example B of a gable truss and gable end wall bracing for a home in a hurricane region

Failure of Roof Structure from Pressurization Due to Window Failure During a Hurricane.

Hurricane Mitigation Retrofits for Existing Site-Built Single-Family Residential Structures

Metal Roof Systems in High-Wind Regions - Hurricane Ike Recovery Advisory

Building Performance: Hurricane Andrew In Florida - Observations, Recommendations, and Technical Guidance, FIA 22

Hurricane-Prone Regions of the United States with ASCE 7-05 and 7-10 Boundaries

Right - The wall framing is connected to roof framing with metal ties for hurricane-resistant construction.

Failure of barrel tile roofing due to bond failure between underlayment, mortar, and tiles during a hurricane.

End wall failure under hurricane force winds due to inadequate bracing of the gable end wall.

Right - Correct angle for installing an engineered structural screw to secure a rafter to a wall for hurricane resistance.

Bolted metal hurricane strapping ties the roofing to the framing and the framing to the foundation walls for resistance to high winds.

FEMA Best Practices for Minimizing Wind and Water Infiltration Damage - Hurricane Michael in Florida, Recovery Advisory 2

Right – Taping the roof sheathing seams can greatly decrease the likelihood of water infiltration into a home in the event of a hurricane.

Failure of extruded concrete flat tile roofing due to bond failure between tile, mortar, and underlayment resulting from hurricane force winds.

This roof is hurricane proofed with a coated insulated OSB deck sheathing that is caulked and taped at all seams with a water-resistant tape, then fully covered with a peel-and-stick membrane, and asphalt shingles.

Wrong - Toe nails in roof truss are set too low in framing bracket and hurricane strap is set too high so lower nails don't hit lower 2x6 of top plate.

Right - An unvented attic with no soffit vents, borate-treated fascia board, metal drip edge, and concrete block construction on this south Florida home help make it resistant to hurricanes, pests, and wind-born wildfire embers.

Right – This hot-humid climate home employs several hurricane- and termite-resistant features including concrete block construction, borate-treated framing, a hip roof design with metal drip edge, impact-rated windows, and an unvented attic.

Climate-specific features include bug- and moisture-resistant concrete block construction and borate-treated interior framing; a hurricane-resistant spray-foamed hip roof; and ventless roof soffits to keep out wind-driven rain.

Buildings damaged by a hurricane storm surge: upper homes on gulf shoreline were hit by large waves above the lowest floor, lower left home on bay and right school 1.3 miles from gulf shoreline were hit by surge and small waves.

Connection Points for Gable End Overhang with Outriggers

Hip roof

Recommended tile and mortar placement for barrel tile roofing

Get a Storm Ready Roof

Recommended tile and mortar placement for "S" tile roofing system.