Grand Rapids Roofing: Article About Steep Slope Metal Roofing

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Homeowners who are considering installing a metal roofing system and have a steep sloped roof will be able to make more knowledgeable decisions if they know a little bit about the different types of materials that are available and the roofing layers that are needed. If they still have questions, Grand Rapids roofing contractors are well trained and experienced with metal roofs and can answer them as well as offer recommendations.

There are three main types of metal coverings that can be installed on homes with steep sloped roofs: shingles, structural panels and architectural panels. Manufacturers make a wide range of metal shingles. Most of them are molded into different shapes to mimic other materials such as individual and multiple asphalt, slate, tile or wood configurations. Structural metal panels are mainly designed to prevent water from passing at joints because anti capillary or sealant can be inserted in the seams. They are also very strong. Structural metal panels can be installed on low sloped roofs as well because they have water barrier properties.

Architectural metal panels are generally designed for steep sloped roofs of at least 3 inches per foot or 14 degrees. Flat seamed, welded or soldered metal systems, such as copper, are an exception to this slope requirement. As a watershedding system, architectural panels allow water to flow quickly down the roof and to the gutters, but the seams aren't usually watertight.

One of our roofing contractors from Summit Point Roofing of Grand Rapids MI would be happy to answer any question you have about leak repair or general residential roofing.

Associated most with structural metal panels, standing seam panels are joined together above the flats, creating a vertical leg and trapezoidal seam. Flat seam panels are attached like shingles, with one edge folded atop itself and another panel folded under before they are hooked together. They are considered watershedding and associated most with architectural panels. Batten seam panels are also used in architectural applications; the panels are installed between metal batten strips and covered with caps.

Metal shingles can be installed in many ways: over spaced structural supports, furring strips, metal or wood purlins with a batten system and solid roof sheathing. Structural metal panels are often installed over spaced structural supports, but architectural metal panels require a solid roofing deck.

Before installing the metal covering, however, the contractor should install underlayment over the roofing deck. The underlayment offers temporary weather protection for the sheathing until the metal covering is secured. After the covering is installed, the underlayment acts as a second moisture barrier if water gets through or underneath the metal. The most common type of underlayment used is asphalt saturated felt, but self adhering polymer modified bitumen membranes are another type. Slip sheets may also be installed over the underlayment.

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