Metal Roofing Preference For Residential
Standing seam metal roofing is quickly becoming a de facto standard in many parts of the country. They are proving to be resilient to storm damage, particularly hailstorms. They retain their beautiful color and shine for 30 years. Also, they are a great investment in your home. However, there is some confusion as to what standing seam metal roofs really are.
If you are a homeowner, and have heard great things about metal standing seam roofing, then make sure you understand what it is. Don’t get bamboozled and install a substandard metal roof thinking it’s standing seam. Here we cover the types of metal roofing that some contractors might present to you as standing seam, but in reality is not.
Metal Roofing That Is Not Standing Seam
One kind of metal roof is PBR metal panels. PBR is the acronym for purlin bearing rib. These are corrugated metal panels that are anchored to the purlins which are part of the roof support structure. These panels have exposed nail heads. Another similar metal panel roof is the 5V Crimp metal roof. These are common roof on barns, farm buildings and other rural structures. The 5V Crimp technology has been around for a while, but is best suited for the farm, not your home.
As the popularity of metal roofing systems grows, many homeowners opt for these cheaper roof systems, thinking that they are getting all the features and benefits touted for standing seam roofs. After a few years, those homeowners are in for a rude awakening when their roof doesn’t live up the the hype.
Standing Seam Roofing
True standing seam roofing has these characteristics.
First of all, the finish on standing seam roofs should be either Kynar 500 or Hylar 5000. This finish is what protects the color and shine of the roof panels. It also protects the roof metal from damaging water and sun exposure. In addition, this finish gives the roof a long life expectancy, even as much as 50 years!
No Exposed Nail Heads
A primary feature of this system is the absence of exposed nail heads. A cheaper metal roof will have hundreds if not thousands of exposed nail head. Each nail has a grommet that breaks down over time, leaving a gap between the nail head and the panel. This gap exposes the nail hole to rain water and exposes the panel to damage in a heavy wind storm. True standing seam panels have no exposed nail heads, but connect via an interlocking joint. The panels are continuous from the top of the roof to the edge, whereas other metal panel systems are produced in standard lengths. With cheaper metal panel roofing, if the roof is deeper than the panel, the top panel is overlapped horizontally over the next one down.
Panels Adapt To The Weather
Without constraining anchors, standing seam roofs are allowed to contract and expand with the temperature extremes. Metal panels that are nailed down will stretch the nail holes as the panels adjust with the weather. When the hole size increases, the gaps allow water to seep under the panels and into the supporting structure and the building below.
Choose Your Roof
Homeowners who prioritize quality over budget will undoubtedly choose standing seam roofs over other metal panel roofs. If budget is a primary concern, or you don’t really care if your roof lasts for 30 to 50 years, then maybe a cheaper option is acceptable. Anyway, you now have the tools to make an informed decision. Good luck!