How To Install A Metal Roof Over A Membrane Roof

Use 1 1 4 inch nails to cover the outline of the roof with strips of metal eave flashing also called edging.

How to install a metal roof over a membrane roof. In a standing seam roof long single panels run vertically all the way from the eave to the ridge. Use metal snips to cut flashing material. With the roof properly prepared we then installed the perimeter flashing and the various other flashing details that contribute to a durable waterproof roof. Install gutters in valleys as needed.

Take care the first piece is aligned precisely perpendicular square to the edge. Place corner pieces where panels will meet bends at the edge of the roofing. Installing a membrane roof over a metal roof on a pre engineered metal building initial lower cost and speed of erection are two of the primary reasons that building owners select pre engineered metal buildings pemb over conventional structures. Drip edge or edge metal is a piece of metal that extends approximately 0 75 inch beyond the roof s edge to channel runoff into your gutters.

Due to the configuration of the metal roof panels it is first necessary to install an eps expanded polystyrene insulation in between the metal ribs of the roof panels to create a smooth surface to support the 1 1 2 iso polyisocyanurate roof insulation over which the 60mil white tpo roofing membrane is installed. If you want to install steel over asphalt your best choice for installing metal roofing is to use a steel shingle system like the one shown instead of the more common and more expensive standing seam steel. If there are gutters installed on the eaves the eave flashing should be installed to overhang the lip of the gutter by about 1 2 inch. Roof deck repaired protected by peel and stick waterproofing membrane levelled use of strapping and perimeter plywood and ready for panel installation.

This is part 1 of a 6 part video series explaining how i installed a metal roof on my house. Take your first sheet of metal and place it on the roof so that it overhangs the edge at least 3 4 in 1 9 cm. Talk to the metal roofing experts at mcelroy metal about all of your roofing needs. Measure the length of the roof edge with a tape measure.

In this video i cover measuring the roof figuring the metal th.