Can You Install A Metal Roof On A Flat Roof

First of all metal roofing is not designed for completely flat roofs although it can go on roofs with a very low pitch.

Can you install a metal roof on a flat roof.

Most metal shingles will be attached to the roof using metal shingle clips but metal roofing shingle installation can be system specific. Most of the types that do this low of sloped roofs are concealed fastened standing seam systems. That being said provided you have at least a little slope you can install it in a situation such as yours. 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.

The installation of metal roofing is often easier and faster than other roof types and because of its simple design and generally large size can actually be installed directly on top of existing roofing materials like asphalt shingles and foam roofing. The look is totally different the sound is noticeable metal would last longer than asphalt shingles. Take a metal sheet and use inch metal wood screws to affix the roofing onto the wood slats. So if your roof has two layers it may require a complete tear off even though steel is lighter than asphalt.

When you lay the first roof sheet the wooden screws will be in the middle and on the inner edge every couple of feet. 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. Plus it has the added advantage of reflecting heat from the sun which keeps energy costs down. To install it slide the flat wide flange underneath.

Open frame metal buildings with batt insulation are the most common but create most waterproofing and installation challenges during the initial installation. Codes vary so call your local building department to know how to install metal roofing over shingles properly code wise. Metal is one of the most popular materials used for flat roof replacement. Most codes now allow no more than two layers of roofing before requiring a complete tear off.

Use metal 1 inch roofing nails to install the metal edging that goes around the perimeter of the roof. Metal specifically aluminum is known for its durability. Some metal roofing can be installed on roofs with a 1 4 12 pitch. Step 4 laying the sheets.

One half inch slope is much better than 1 4 inch slope. You can also nail a chalk line straight every 2 feet to use as a guide. Conventional structures with a steel deck with rigid installation under the metal roof provide the best results. 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.

Consult the guide for your shingle brand to determine the specific method of installation required to preserve the warranty.