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Storm-Ready Roof Decking and Underlayment

Jesse Gonzalez joins Bob at the Punta Gorda storm-ready home to explain the roofing process. The crew has already nailed on the 30 pound asphalt-impregnated felt paper. They are now hot mopping 90 pound roll roofing with asphalt adhesive to make it adhere to the felt paper below. Gonzalez shows Bob the decorative wood dormers on the front of the house that are wrapped in house paper to protect against water intrusion. Bob remarks on the decorative arches above the front entry porch and the front window. They mirror each other as design elements and will both feature decorative columns. Around the back of the house the crew is completing a section of roof deck. They are using 5/8-inch plywood sheathing for a stiffer, more wind-resistant roof deck. The crew uses metal plywood clips to align the plywood and keep it even for nailing.

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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:

Storm-Ready Roof Decking and Underlayment

computer-generated transcript - may not be 100% accurate

" Well Jesse Gonzales is here from Mercedes homes the company that's building this house. And since last week of course you've made huge progress we've got a roof in -- by the end of today it's all going to be a completed her. Right correct yes what we have and we have the trusses in place right now the guys up here hot mopping the roof. I'm we have tile guys on standby to start but on the tile right after they're done and we're very excited about that but let's talk about the different elements. What's the black stuff that we're looking at as a thirty pound felt that they put down over the up plywood this is not -- roll roofing met with the -- thirty pound. Belle did to kind of an asphalt impregnated paper product correct. And that's usually the first step that is the first and then after that what they do is they mop down a ninety found. OK slow down the green roll roofing that we're looking at is rated ninety pounds right now and what makes it green. I'm just colors they have different -- talking nothing but there's mineral granules -- And the color doesn't mean anything although in some -- you can put up a roll roof. Through and -- evergreen -- that OK now let's talk a little bit about these design elements that. I was familiar with the looks like a dormer Britain correct it's just a decorative dormer we have one over here above the garage and we have one over the master. It's just there for now. What we're looking at then is all wood framed. Correct and it's just attached to each of the groups that's not OK and why do you bother with -- house wrap on it we house wrap all exposed wood. Deep water -- Now this room. Keep that and it's and that in the little porch over the front door area. That's -- god has an unusual design feature come about that rob what we do is we try to mirror the arch over here on this decorative dormer over here to give them front kind of and eventually there will be a nice column in there right now being cast column on here they'll be one here and then two over here we have exposed me. It's amazing how quickly this all going now. I -- you start to finish from a bare lot. How many weeks will have passed when you expect completion probably about. Eight weeks eight and timely feature and we fear that's a short period time. All right let's go on the backside is another still putting some of the sheathing on there right correct."

" All right I know is going at breakneck speed. You're putting the finishing touches on sheathing and you -- I don't correct. So let's talk a little bit about. What we're doing is we've already talked about the truss system and now it's oriented strips. And we're that is -- where you think about it plywood. I think good call I mean traditionally in the industry if you want to half plywood for the roof sheathing. And that extra bit of thickness is going to need a lot of stiffness right correct it. Now when these metal pieces that are. Put down a -- on the plywood that helps keep all the plywood in line plywood clips. So that's not necessarily about. Keeping the roof. Structurally sound and hurricane places but. Making sure that the plywood lies down correct flatten evenly."

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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.

Reviewing the Apartment's Paint Colors, Finishes, and Roof Deck

Bob is back in the penthouse apartment, this time in the main hallway that has the Marmorino wall finish that flows into the lavatory, which features a thyme green semi-gloss paint from the Bob Vila Signature Collection. The warm green walls highlight the stark white plumbing fixtures from Toto USA's Mercer collection. Bob takes a quick jaunt up to the ipe wood roof deck.

Hurricane-Resistant Roof Tiles

Bart Cox of Hanson Roof Tile and Dave Peck of D. Peck Roofing explain the roof covering system to Bob as they tour the Punta Gorda storm-ready site. Cox explains how Hanson Roof Tile has improved their design and now manufactures extruded cement barrel tiles at four plants in Florida. The tiles are made of cement, sand, and pigment, and are extruded, cut, and pre-drilled for fasteners at the factory. Cox explains that tiles were once laid directly on top of the roof paper with no fastener or adhesive. In Florida, high winds later forced roofers to apply cement adhesive to the tiles. When fabrication shifted to a less-permeable cement product, the tiles no longer adhered to the cement. Now they are mechanically fastened into the roof decking through the pre-drilled holes. Dave Peck, who has been roofing for the past 15 years, explains a system that has evolved over the years in response to hurricanes, water, and wind damage. Their crews now mechanically attach the 30 pound felt paper, then hot mop each course of 90 pound roll roofing with asphalt and nail it in place along the upper edge of each course. At the final point of susceptibility, the hip or ridge line, the roofers now use a metal hip and ridge nailer board. The cap tiles are nailed to the board with additional foam adhesive underneath to keep them in place. Experience has taught the roofers that hip and ridge tiles must be firmly affixed to prevent blow-off and damge to field tiles and other property.