A majority of metal roofing shingles were specifically designed for installation by roofing professionals. They offer J-channel receivers that were built for use with trim accessories, including valleys, gable and trim, and sidewall flashing. However, if you are interested in installing metal roofing, you may want to have basic information on how to work with metal shingles.
Skylight and Chimney Flashing
When using metal shingles in these areas, it is important to hem the base flashing to shingle rows directly below the skylight or chimney. You should be sure to apply sidewall flashing that is open hemmed and then hem the shingles into the flashing and valleys.
Trim and Gable
When working with metal shingles, it is important to use a standard drip edge, and you should then install it around the perimeter of the roof. This should include gable ends. Shingles can then be hemmed over the drop edge, and they should be squeezed tight against the trim using hand tongs.
When working with the valley trim, it is important to treat the trim how you would treat standing seam roofing. Seal the top portion of the valley hem with the use of a urethane sealant, and then apply the hemmed shingle. Next, pound the shingle and the open valley hem with a rubber mallet so that they are flat.
Endwall and Sidewall Flashing
Endwalls and sidewalls may be handled in a similar fashion to skylights or chimneys. Otherwise, you can use the shingles by folding them up the walls. They can then be covered with counter-flashing or siding.
Metal shingles are designed for simple and easy installation so that metal roofing contractors and asphalt roofing professionals can both use them. For this reason, the typical method for terminating the details is designed to be a simple process.