Standing Seam Metal Roof Underlayment

These advantages and disadvantages do not apply to granulated synthetic underlayment as it is not to be used directly under metal roofing.

Standing seam metal roof underlayment. Metshield sythetic is rated for commercial and residential applications using plastic cap fasteners and roofing nails 3 8 inch head and is an ideal underlayment for asphalt shingles metal tile slate and a variety of sloped roofing materials. It serves as a moisture barrier as well as a slip sheet. Once again this is used on cold roof construction. It s applied under all of the other materials and it provides an extra layer of protection against extreme weather conditions.

The many style options of metal roofs. Standing seam metal roof underlayment i ve heard two different stories regarding underlayment. Make sure the product is designed to be used under metal. As long as the interior of your roof is protected from moisture accumulation underlayment is not required though homeowners planning to insulate their house heavily may choose to install plywood to protect their investment.

Concerns with metal roofs. Underlayment is a vapor barrier or water resistant material that s put under metal roofing and installed directly onto the roof deck. To meet this requirement the ps type of premium underlayment from tarco for example has been formulated to remain stable to at least 260 degrees f which is well above even the highest temperatures found on roofs under extreme heat conditions. The roof pitch is 2 12 and does not have an attic but does have soffit venting across the entire length of where the metal roof would go.

Although it may seem counterintuitive metal roofing can be attached directly to your building s roofing structure without the need and expense of plywood sheeting. I am the process of getting quotes for a mechanically sealed standing seam metal roof over an addition of the house we just bought. Many metal roof problems are due to moisture. Conversely when compared to asphalt based membranes butyl based self adhering sheet membranes provide protection in high temperature environments where the in service temperature can reach temperatures as high as 240ºf.

We recommend a polypropylene scrim reinforced underlayment made up of multiple layers. This type of underlayment is critical to a quality roof installation. The first is run ice and water shield 4 feet up and then use 30 pound felt the rest of the way up the roof or use ice and water shield on the entire roof. They are effective on standing seam metal roofs for ice dam protection in the places you might expect including roof eaves valleys dormers or rising walls.

Standing seam underlayment return to. Moisture can infiltrate the underside of metal roofs through condensation and strong rain events.