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.

Standing seam metal roof underlayment.

Standing seam metal roof underlayment i ve heard two different stories regarding underlayment. Concerns with metal roofs. 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. The many style options of metal roofs.

Make sure the product is designed to be used under metal. Standing seam underlayment return to. It serves as a moisture barrier as well as a slip sheet. 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.

Once again this is used on cold roof construction. 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. We recommend a polypropylene scrim reinforced underlayment made up of multiple layers. 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.

These advantages and disadvantages do not apply to granulated synthetic underlayment as it is not to be used directly under metal roofing. Underlayment is a vapor barrier or water resistant material that s put under metal roofing and installed directly onto the roof deck. Lower slopes for low slope standing seam metal roof applications strictly peel and stick underlayment is a better choice. 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.

Moisture can infiltrate the underside of metal roofs through condensation and strong rain events. I am the process of getting quotes for a mechanically sealed standing seam metal roof over an addition of the house we just bought. 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. Because a metal roof can get hotter than a black asphalt shingle roof underlayments for metal roofing must resist flow at even higher temperatures.

Metal roofing comes in numerous styles that mimic modern architectural shingles unique clay tiles traditional standing seams metal roofs with panels that run vertically up the roof charming wood shakes and more. 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.