Can You Put Metal Roof On Flat Roof

Install gutters in valleys as needed.

Can you put metal roof on flat roof.

Use metal snips to cut flashing material. A metal roof can be installed right on top of your existing roof most of the time. So if your roof has two layers it may require a complete tear off even though steel is lighter than asphalt. Install metal flashing along the edge of the roof using a hammer and 1 2 inch roofing nails.

Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12. Most codes now allow no more than two layers of roofing before requiring a complete tear off. Because of the shallow height of the undulating ridges of the 5v and corrugated profiles and the use of exposed metal fasteners to screw the metal to the roof deck they are limited to a slope that will shed rain quickly. Most metal shingles will be attached to the roof using metal shingle clips but metal roofing shingle installation can be system specific.

Metal roofing typically comes in large sheets but you can order smaller sizes to fit around unique features or irregular extensions of your roof for example small patios or covered stairwells. Low slope metal roofs have simple geometries and are easier and less expensive to install that medium to steep slope roofs. Consult the guide for your shingle brand to determine the specific method of installation required to preserve the warranty. Low slope metal roofs require less material which reduces the overall load on the building s structure.

Plus it has the added advantage of reflecting heat from the sun which keeps energy costs down. Cut the gutters to fit using metal snips. Codes vary so call your local building department to know how to install metal roofing over shingles properly code wise. Flat metal roofs can last for almost 35 years in ideal conditions.

This eliminates the cost of ripping or tearing off existing material. A metal roof can actually last up to 100 years. Measure the length of the roof edge with a tape measure. But the taller profiles like standing seam and pbr shown below can be installed on roofs with as low as 1 4 or 1 2 in 12 pitch.