Provided the roof deck is in good shape, installing an appropriate standing seam metal roofing such as batten seam over purlins is a viable way to install a new metal roof over the existing asphalt roof. Air pockets are indeed a great way to further insulate the roof.The Different Types of Metal Roofing Standing Seam vs 5V Crimp. When it comes to metal roofing, homeowners and business owners alike have options to choose from. Two basic metal roofing types, standing seam and 5V Crimp, may seem identical to the average passerby. However, they differ in the benefits that they have to offer.Standing seam metal roof systems. standing seam metal roofing is a concealed fastener roofing system which features vertical or trapezoidal legs with a flat space in between. This metal roofing system from MBCI is one of the most durable and weathertight roof systems available in the industry.A standing seam roof is among the most durable and maintenance-free type of any metal roof and can last over 30 years. Standing seam roofing provides additional energy reduction benefits and can be installed easily, in many instances over the existing roofing material.S-5-U Clamps. The S-5-U clamp is by far our most popular and most versatile clamp. It fits about 85% of the standing seam profiles manufactured in North America-including most structural and architectural profiles.While standing seam roofing systems have been used for generations, 138T and 238T panels feature technological advances in roofing that set a new standard for standing seam performance. 138T and 238T systems are classified as symmetrical standing seam systems and offer many advantages including patented recover solutions featuring the industry’s best method to recover existing metal or shingle.Standing Seam Systems. Standing seam systems are used for a wide range of applications and projects. These systems feature interlocking seams that connect panels, giving the roof a distinct, and attractive, appearance. Furthermore, standing seam systems are manufactured from high-end steel or aluminum offering years of low-maintenance service life. · Why Standing Seam Roofing Graces So Many Steel Buildings. Strong, sleek, and attractive, a standing seam metal roof promises that rare combination of form and function. Standing seam steel roofing looks better, lasts longer, and provides superior waterproofing. What is Standing Seam Roofing? Standing seam roofing is ingenious, really.