Modern metal roofs are expected to last 30 years or longer. Even in those cases, the OSB is only effective in the … Todd is currently Vice President of the MRA (Metal Roofing Association) and a Past Chair of MCA (Metal Construction Association). Yes, you should use some sort of underlayment. It’s so important that you have to arm yourself with knowledge and know everything there is to know so you’ll know the best way to utilize it for your roof. Read on to know more about this material. If the shed is all-metal construction, you'll have to construct a wooden framing network to accept the plywood or OSB underlayment. Oriented Strand Board, commonly referred to as OSB, is a type of engineered lumber similar to particle board, formed by adding adhesives and then compressing layers of wood strands. Wordfence is a security plugin installed on over 3 million WordPress sites. OSB for Roofing. Cabin Forum/Blog: Is there a need for OSB panels and underlayment (felt) when using metal roofing? Access from your area has been temporarily limited for security reasons. A horse kicked the roof during a vet visit, lol. : In an ideal world you would schedule your roof construction during a dry period if possible. C.King says: … April 3, 2017 | Filed under: Metal Roofing, Roofing Answers, Roofing Installation, Roofing Materials Oriented Strand Board, commonly referred to as OSB, is a type of engineered lumber similar to particle board, formed by adding adhesives and then compressing layers of wood strands. If you are a WordPress user with administrative privileges on this site, please enter your email address in the box below and click "Send". The proper method for installing metal roofing over a heated space (a house) is to put down OSB or plywood sheathing, then ice & water at least two rows up with roofing felt for the rest and then the metal roofing. Depending on your roofing design, allow time for membranes to be installed, or at the very least get a tarp on it before it sees any rain. While a horse shed is damp, the ventilation is usually good as well. I’d suggest a synthetic underlayment. We are checking into a metal roof and we have a question that needs to be clarified. Basically speaking, ignoring sub-insulated roofs which are a special case (with rigid foam board insulation directly under the metal roofing), the roofing needs proper support to be able to handle snow/ice loads, wind loads, and walking on during installation, cleaning, and maintenance. Any suggestions are appreciated. Just wanted some clarification. Foil-backed OSB is applied mostly in attics; however, it is also used in wall systems. It is most often OSB – a type of particle board – or plywood. A. OSB in good condition will have every similar fastener pull-out resistance to CDX plywood. Cornell ThermaCal Nail Base Roof Insulation Panels Data Sheet … ThermaCal ® Nail Base Roof Also classified under ANSI/UL 1256 for Insulated Metal Deck Assemblies, Constructions No. If you get 45 or more pounds of pull out resistance, that’s considered acceptable for most applications. The insulation system under metal LINITHERM PAL OSB combines thermal insulation, protection against electrosmog, and a seamless substructure for the roofing in a single element. OSB is widely used as roof decking material. The theory being that it allows the metal to breath and does not trap the condensation. Be sure to use stainless steel or galvanized nails. My concern is that there would be only the metal betweeen the … My preference is plywood. OSB and plywood come in thicknesses ranging from 5/16 to 3/4 inch, and the thickness needed for a particular roof depends on several factors, including rafter spacing, expected load and roof design. Your email address will not be published. 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