Roof flashing installation is a component of any roof, that ensures protection against any type of weather. Corrugated metal roofs are no different. The flashing that goes around the outer edge of the roof, as well as around the vents and chimneys that your house may have, is the spot that leaks occur most often. Contractors will line up to install your roofing needs, but with a little knowledge and the drive to save some time and money, any homeowner can accomplish the same job.
Mark the Flashing Stop and Start Points
After you have removed all of the old roofing materials, and stapled down the felt paper, it is time to prepare the roof for the installation of the flashing. From the edge of the eaves, on all sides of the house, mark lines 1/4 inch up. Use the chalk line to make a mark that extends over the full length of the roof, on all the sides that have a downward slope
Using Correct Manufacturer's Screws
As with all other types of roofing materials, a row has to be nailed down to ensure that moisture does not back up underneath the corrugated metal roofing sheets. This is done by using pieces of metal flashing, and securing it down with special sheet metal screws which should be purchased at the time that the rest of the materials are obtained. This ensures that the correct screws are used, because each manufacturer recommends using a specific type and size of screw. The corrugated metal sheets will then clip onto these screws, helping secure the roof down.
Install the Starter Row
Begin the starter row from either side of the eave, following the chalk lines that you previously made. Use the screws provided to secure the flashing in place, sinking a screw in every 12 inches on center. Repeat this step, until all of the eaves on the entire house have been covered with this starter row. You need to repeat this step on any gables, using the same type of flashing and screws.
Install the Flashing around the Vents and Chimneys
The final step in installing the flashing for a corrugated roof is to cover the area around the vents and the chimneys, to help prevent water leakage in these areas. You can either use prefabricated flashing in these areas, or you can use a sheet metal brake to make your own. Just be sure to install the flashing tightly, and correctly install any rubber fittings that may have been included when you purchased the prefabricated flashing pieces. Be sure to caulk around the inside seams, where the boot is to provide better weather protection.
Installing your own corrugated metal roofing can save you time and money, and with a little patience and knowledge, it is an easy job to complete. The roof flashing is one of the main barriers for your roof against the weather, and when installed right, can be counted on for years of protection for your house.