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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.
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Building a Hurricane-Resistant Home

  computer-generated transcript - may not be 100% accurate

" Joining us now is Leslie Chapman Henderson from the federal alliance for safe homes and we collaborated last year on a project -- so glad that you guys can help us. Understand a little bit about the technologies of building. A wooden roof on top of an old steel box thanks Bob well."

" One of the things we look at here is wind protection in any minute any disaster like hurricane tropical storm we want to make sure that every stays attached to whatever type -- We haven't place in this in this particular instance while we look at."

" Is that uplift protection from the hurricane straps and clips that uplift protection from the -- what does uplift. Really refer to the it means when the wind is pulling on your roof trying to take it -- peel it off the top of here so what we want to do is have a secure down. Certainly in math and will not see that. The other piece is the ridge system it up some plywood decking. You want to make sure it stays firmly attached to the group -- says that no holes open up allowing more wind to come and and more those pressures to pull and force the roof -- and the way we did that is we select roof decking of a proper thickness in this case we prefer five eighths. Plywood nothing thinner than anger and we like a six inch nailing pattern that's in the field and along yet."

" so that means that every six inches we've got. An annular ring -- and it's going into the tops of each and every one of these -- trusses that are already been put up."

" There we make a great point it's essential that we don't miss the -- and that's a common problem because of pneumatic nail guns and sometimes. That the roofer cannot feel whether the nail has gone -- or not."

" Right and they're trying to go in a hurry and get it done is after all it's. Cost -- anything about about about next thing you know he's put in a whole row they've all missed the top -- a -- and we're not going to let that happen here and that's that this types of simple things can really make a difference in a high wind. And here where you're actually strapping the bottom of those trusses onto the steel what kind of what kind of a strap."

" Have we used well I think he says it selected whatever's been specified in this case by Simpson strong tie and the other engineers to make sure that it is it that it -- hold for uplift as well as the lateral pressures which are the push pull. Affect of the ways that we need to keep that. The roof held down as well as anything that's doing a pushing action on the wall that translates up into the roof system."

" OK so here we are. Back in Florida almost didn't September let's reminisce just a little bit about what we were doing last year because this is all about hurricane storm readiness and as we speak there's a tropical storm called Ernest stow. That is making its way through Cuba back -- straits and potentially threatens when -- gorda we're working together last year."

" That's right in our private but here's you recall what week it is kind of monolithic pour it. Place concrete six inches thick to protect for overall impact resistant because it got added benefits it. Quietness energy savings in all different types of positives there."

" This is an alternative to traditional concrete block structures with a concrete blocks are simply laid up there's an off -- placing one. One operation and of course that allowed us to insert all sorts of steel fasteners along the top of that concrete workers so that when the point. Came to start building the roof. We already had fasteners and."

" Place that's right we had to -- recall within fifteen minutes of the pour those straps had to be embedded into that poured wall. So they could set properly and then be brought over top once the trusses were planning in and laid out."

" Exactly and then. That complicated system -- we had you know hip -- and we didn't have a simple gable end roof like we have here all of it. Is tied together with that sheathing that plywood sheathing that's rating and five eighths inch with the six inch nail pattern eight penny ring shank."

" Nails properly spaced never missing a -- and because the work you did last year the state of Florida wanted to express their appreciation sent French a little gift today. From the governor's hurricane conference and on behalf of -- state for the awareness that you created of what can be done to protect -- home and make it more disaster."

" Thank you Leslie that's terrific really appreciated. Well the state of Florida is after all leading the way in terms of educating the public and the building industry about these very special circumstances for. Home builders throughout not just Florida but the whole gulf region where we're constantly threatened by hurricanes and I know that you've got some good news."

" Well and that's right because we know that we can get to this issue with new construction but we also an 80% of our time. Were built before they may it's is that it's a new awareness of how to build it stronger. The state of Florida last year put 250 million dollars and it came with another hundred million dollars to help people who have the older homes be 14000 mind. And after this sixties when we went through -- quiet hurricane period and unfortunately. Our building practices quieted down and became a little lax as well so we're going to be out there helping people. Of low income and modest means. Take a look at their -- to see what we can do to retrofit or -- hands against her how do these homeowners take advantage of this program all they need to do is call the 800 number or click on a website my safe Florida home dot com and it will guide them through the process my safe Florida home. That's right dot com. Or you can link at bobvila.com I'm sure you get further information thank you -- way thank you very much faster."

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