Wind Lifting Roof Tiles

Tiles can curl in the wind when they are hit from the side.

Wind lifting roof tiles.

Use findings to evaluate fbc 1609 5 3 and tas 101 95 mech. Compare contrast wind resistance of installation options mech. Wind can lift up the material and rip it away or leave it with bubbles which hurts the integrity of the covering. Wind uplift loads are determined for three different zones of a roof system s area.

Tile roofing for high wind regions key issues missiles. Damaged soffit or fascia like shingles soffit and fascia keep water away from the roof reducing the chances of getting a leak. Long before the wind force is strong enough to rip the tile off the roof it will be lifted and dropped with each wind gust making an impact noise which may result in breakage. During windy weather a tile or slate will be subject to wind uplift forces caused by the wind blowing over the roof and creating vortices as it passes over the edges.

Many studies have been made and published related to wind resistance of green roofs but in reality there is still a lack of consensus in the international green roofing building industry on what kind of testing and certification would be most appropriate and representative of real wind effects on vegetated roofs. Even if that doesn t happen curled tiles will no longer keep water and debris from getting to your roof. Develop a wind load model for low medium and high profile roof tiles to compute pressures and attachment forces 2. Field 1 perimeter 2 and corner 3.

Even when well at tached they can be easily broken by missiles. Furthermore the roofing designer or specifier sometimes assumes if there is a design wind speed requirement of 90 mph then the roof system must have a 1 90 rating which is not always true at least not for the reason they think maybe for tall buildings or if other factors exist. One is that they don t know about the new requirement for single lapped roof tiles to be mechanically fixed to prevent wind lift on tiles two is that they know about the new standard but figure that doing it the way they have always done it nailing every fifth course was ok for years so don t see why it shouldn t be in the future. Tile roofs are very vulnerable to breakage from windborne debris missiles.

American society of civil engineers asce 07 minimum design loads for buildings and other structures is a widely recognized consensus standard method for determining design wind loads on buildings and other structures. If a tile is broken debris from a single tile can impact other tiles on the roof which can lead to a progres sive cascading failure. As with lifting curling can loosen nails and break seals.