View ChannelsFeatured: Finance
View ShowroomsFeatured: Radiantec - Radiant Solar Heating

BobVila.com

Home

Protecting the Roof From Hurricane-Force Wind

Bob is joined by Leslie Chapman-Henderson of FLASH � the Federal Alliance for Safe Homes � at the storm-ready house in Punta Gorda, Florida. Chapman-Henderson explains that FLASH was born after Hurricane Andrew to bring information about safer building technologies to homeowners in hurricane zones. Since that time, FLASH has expanded its work throughout the country, helping to educate homeowners on protecting their homes from natural forces like wind, water, hail, wildfires, and earthquakes. She tells Bob that homeowners spend 250 billion dollars each year on home improvements. Chapman-Henderson urges homeowners to think about safety and enhanced protection when making home improvements. Roofs are a key threshold of protection in a storm-ready house, she says. Reinforced concrete walls are a great start, but it is essential to keep the roof tied down. Chapman-Henderson explains how wind works dynamically, pulling and pushing on a house to peel off the roof. The only way to keep a house together is to maintain the connections between the roof and the walls, the floors and the walls, and the walls with the foundation. When a house works as a unit, it stays together. Bob and Chapman-Henderson look at the engineered truss system that supports the roof and ties it into the walls to distribute the wind load that will hit it during a hurricane.

Get Adobe Flash Player to see this content.

Chapters from this episode

Protecting the Roof From Hurricane-Force Wind Now Playing

Protecting the Roof From Hurricane-Force Wind

Storm-Ready Roof Decking and Underlayment Now Playing

Storm-Ready Roof Decking and Underlayment

Hurricane-Resistant Roof Tiles Now Playing

Hurricane-Resistant Roof Tiles

Using Roof Ties to Secure a Roof Against Hurricane Uplift Now Playing

Using Roof Ties to Secure a Roof Against Hurricane Uplift

Reviewing the Work Involved in Building a Hurricane-Resistant Home Now Playing

Reviewing the Work Involved in Building a Hurricane-Resistant Home

Clip Transcript For:

Protecting the Roof From Hurricane-Force Wind

computer-generated transcript - may not be 100% accurate

" Leslie Chapman Henderson is with us again hi Leslie and from flash of course now tell us what latches latches that federal alliance for safe house --"

" Innovation it being after hurricane and -- he came cleaner. -- needed information about how to protect themselves from high winds like hurricanes. Since that time in 1998 grand dramatically we're now working across the country and helping people understand how to build safely in. The face of wildfires where earthquakes hail and other types them. -- it's not just about hurricanes survive necessary act in this country. Arson and like to build in harm's way and that's where nature is at its next. Partner and a trillion dollars and plaster -- and incitement numbers explain in basic -- safety information. Out."

" So that's 250 billion. What percentage of that was spent by the ladies of the house well Harvard tells us that 80% of those decisions were made by the female in the -- a lot of money."

" Yeah so we weren't looking at this house well we want to talk about got these terrific concrete walls for impact resistant carry any heat this green on top what happens and hurricane terms of the wind trying to blow the roof. Well the wind comes from every different direction it's important remember he can't explain why I think it's very dynamic. It's going to kind of push on your house fasten them all on your roof. Which when you do -- and -- connecting all the different parts of the house so that he can work as a unit. And it doesn't bail and here."

" Overhead we've got. A truss system and this is a little complicated to understand it right now because we've got all these different members coming together including. The choice for ceilings where in the garage. And we can see that trusses up there. Which your. Factory made right that's correct and the key to all of this is which just talking about as tight fasten all."

" Holding it down onto this wall system we've -- idea that he has to win this thing up. Potentially up underneath the -- And try to pull or peel the roof tops are every place where it's attached has been reinforced with the wind is let's learn more about these ties have."

[-]

More Videos »Related Videos

Hurricane Straps, Clips, & Anchor Bolts

Your home's ability to resist the extreme force of wind is only as strong as its weakest link, so the only sure way to create a wind-resistant home is to secure all its connections: roof-to-wall, floor-to-floor and wall-to-foundation. The roof is your home's first line of defense from a storm. To make sure the roof stays in place when severe winds blow, securely anchor roof-to-wall connections by installing hurricane straps or clips at every wall-to-rafter connection to reinforce the roof. Even if re-roofing your existing home is years away, it is possible for roofing professionals to access and reinforce an existing home's roof-to-wall connections with hurricane straps and clips. These connections are critical in holding the roof together and will dramatically increase the homes overall resistance to wind. Along with roof-to-wall connections -- all joints in the structure -- floor-to-floor and wall-to-foundation -- must also be secured to create a "continuous load path" to the building's foundation. Secure floor-to-floor connections by making sure each floor is connected to the floor below with straps or clips in addition to any other code-required nailing schedule. Wall-to-foundation connections should be made through the use of anchor bolts or mud-sill anchors. Be sure to install all connectors following manufacturer's specifications.

Hurricane-Resistant Garage Doors

Ernie Hutto from DAB Garage Doors explains that the garage door is the largest opening into any home. Hurricane winds can twist and shred a door, bringing wind force and pressure vacuums into the home and causing building failure. Hurricane Master doors are made of 24-gauge steel to make them more resistant to failure. DAB Hurricane Master doors are strengthened with their patented Interforce system that reinforces the top and bottom panels to prevent door twisting and blow-in. Denver Miller and his crew install the panels starting at the bottom. Reinforcing bars are integral to the design of these hurricane-resistant doors. The Interforce bars are added to the top and bottom panels to give more strength during high winds. The garage-door tracks are also reinforced with seven brackets, a flag bracket, and a 14-gauge steel track. This prevents the tracks from pulling, twisting, and blowing in during a hurricane. The garage door opener is also installed but, as Miller points out, it need not be heavy duty because the strength of the system relies on the torsion springs not the opener. An opener's job is simply to guide the door, not pull it.

Hurricane Protection for Porches, Windows, and Doors

Ted Gower from Armor Screen is installing the hurricane-protection fabric that will make the lanai a hurricane shelter in case of a storm. There are bolts and clips at the top with clips along the side. The sides are locked down along the sides and bottom to resist the enormous wind pressure during a storm. This geosynthetic fabric serves in stead of plywood or other storm protection coverings. The fabric reduces 100 mile per hour (mph) winds to 3 mph and reduces it to 0 mph if rain sheets on the fabric, causing a complete wind barrier. This fabric stands up to winds and wind-borne debris, making the enclosed lanai a hurricane-safe shelter by code and by design. Armor Screen can be used on any door, window, or porch openings to protect homes from damaging winds and flying debris.

Building a Hurricane-Resistant Home

Bob talks with Leslie Chapman-Henderson from the Federal Alliance for Safe Homes (FLASH) about the technologies involved in securing a roof. Chapman-Henderson explains the importance of keeping a roof secure in high-wind situations. Uplift force is explained as wind is that pulls on a roof, with a force that can tear the roof right off the home, causing catastrophic building failure. Keeping a roof secure involves affixing the roof decking, the plywood, so no new holes are created during a storm that would allow more wind to come in. FLASH standards specify plywood of a certain thickness, 5/8" minimum thickness with 6" inch nailing pattern, securely nailing into the trusses. Pneumatic nail guns, employed in a hurry to save costs, often miss the underlying truss. Simpson StrongTie straps are used to secure the truss to the structure. Tie-downs secure the roof vertically and horizontally. Bob and Chapman-Henderson review the Punta Gorda storm-ready project completed last season. The house in Punta Gorda was a monlithic concrete structure, poured in one solid pour with steel reinforcing bars embedded throughout. Steel fastenerstied directly to the exposed rebar to secure the roof. The roof decking and tie-down followed FLASH's Blueprint for Safety, just as the current roof does. Chapman-Henderson presents Bob with an award from the Governor's Hurricane Conference for his work to increase awareness of the need for storm-resistant homes. According to Chapman-Henderson reviews the governor's program that makes $250 million in Florida funds and $100 million from HUD to help people in Florida retrofit their homes to bring them up to code and make them storm resistant. The My Safe Florida Home is available to low- and modest-income residents. Eligible viewers are encouraged to call the 800 number or go to mysafefloridahome.com to begin the process.