Flashing is the metal that carries water across every place the tile field stops: a wall, a chimney, a vent, a valley, a rake. On Tampa tile roofs it fails long before the tile does, and it fails quietly because it lives under the tile.
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Six boxes, about thirty seconds. You pick when to be called back, and that is when the phone rings.
Or call (813) 742-0423Every interruption in the field is a place where the shedding surface ends and water has to be handed off to something else. Metal does that handoff. The Florida Building Code sets a floor on the material: where flashing and counterflashing at the juncture of roof and vertical surfaces are metal, they must be corrosion resistant and not less than 0.019 inch, which is No. 26 galvanized sheet gage. That is a minimum, not a target, and it says nothing about how the metal is laid, which is where most failures actually start. The broader map of these repairs sits on the services page.
Flashing works because water meets each piece in the correct order from the top down. Turn one lap the wrong way and the metal becomes a funnel pointed at the deck. The recurring Tampa examples are a wall flashing whose vertical leg was tucked outside the building paper instead of behind it, a chimney with counterflashing surface-sealed to stucco rather than let into a joint, and a pipe collar sealed with mastic after its rubber split. All three test fine in ordinary rain and leak in a squall, because sealant is a consumable and lapping is not.
The Florida Hurricane Retrofit Guide puts numbers on this. Above 60 miles per hour, rain is driven against a house with real penetrating force, and the pressure differential from a 100 mile per hour wind will push water roughly three and a half inches up through any crack or opening on the roof, a gable wall or a soffit. At 130 miles per hour that becomes about six inches, and at 150 about eight. It also notes that attic and interior pressures are usually slightly negative, so the building is pulling water inward at the same time the wind is pushing it. A flashing detail with three inches of vertical leg is not a defect on a calm day and is a hole in a named storm.
The Florida Building Commission's fastener corrosion study found that 23.8 percent of surveyed roofing professionals usually or always saw corrosion on penetration fasteners, against 16 percent for tile fasteners in the open field. That ordering is the useful part: the metal around a vent, a stack or a wall is fixed with more fasteners, in wetter conditions, often with mixed metals, and it gives up first. Within about ten miles of a Florida coast, 57.8 percent of the same respondents reported corrosion usually or always present. On a house that predates March 1, 2002, the date the City of Tampa uses to trigger its hurricane mitigation retrofit requirements, decades of successive repairs usually mean several generations of metal are stacked in the same wall detail, quietly reacting with each other.
Flashing is set into the underlayment, so repairing it means opening the membrane. If the felt around a failed pan flashing has been wet through two rainy seasons, replacing the metal alone buys a few dry weeks. That is the point at which a flashing call becomes an underlayment call, and it is better discovered with a measuring tape than with a second leak in October. Where the exposed and relaid area grows, the city's 500 square foot permit threshold and the dry-in inspection before tile goes back down enter the calendar; where the work stays genuinely non-structural and under $7,500 on a single-family house, Hillsborough County's House Bill 803 exemption may apply, though an exemption application still goes through the county portal with documentation of the scope and value.
Tile is lifted at and above the suspect detail, the metal is exposed, and the laps are traced in the direction water travels rather than the direction they were installed. Corroded or undersized metal is replaced to at least the code gage, the vertical leg is set behind the water-shedding layer, the membrane is tied in with compatible self-adhering material, and the tile is reset with a breakage allowance. Price follows linear feet of detail, the number of penetrations, whether stucco or masonry has to be cut for a reglet, and how much membrane has to be renewed. Ask for the felt condition around the flashing in writing even when the news is good. Two neighbors of this repair: roof valley repair, where the same metal carries far more water, and skylight leak repair, the penetration that most often gets sealed instead of flashed.
Roof Flashing Repair in Tampa. Call (813) 742-0423 and a technician is dispatched with the parts on the truck. You get the price before the work starts.
Call (813) 742-0423Florida's code defines a secondary water barrier as underlayment protecting the sheathing if the covering blows off, and accepts either 4-inch self-adhering tape sealing all deck joints plus an approved underlayment, or a full-deck application; the Existing Building Code deems correctly installed clay and concrete tile systems to comply, and statute 553.844 bars limiting the requirement to one method.
Why it matters: It tells a tile owner the barrier is delivered through the underlayment specification, so the specification named on the scope of work is the barrier.
Sources: floridabuilding.org · up.codes · flsenate.gov
Florida Building Commission soffit research found the worst negative pressure occurs with wind parallel to the ridgeline at the windward sidewall, recorded a 70 psf change within one second in a Category 5 case, saw static failure at +40 psf, and noted undeformed panels found on the ground afterward, indicating the support channels are the weak point.
Why it matters: It explains why an attic can flood with an intact tile field overhead, and why soffit work belongs with roof repair.
Source: floridabuilding.org
A Florida Building Commission survey of 385 roofing professionals found corrosion reported usually or always on ridge vent fasteners by 41.8 percent of respondents, on penetration fasteners by 23.8 percent, and on tile fasteners by 16.0 percent.
Why it matters: It ranks which roof components to inspect first, and shows the exposed metal at the ridge is the most vulnerable part of the assembly.
Source: floridabuilding.org
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