How Long Will a Metal Roof Last?

July 18th, 2016

How Long Will a Metal Roof Last?

Are you interested in making your house more energy efficient, adding a beautiful and striking major design element and never having to replace your roof again? Consider a metal roof.  While the initial cost of a metal roof is significantly higher than an asphalt roof, it will likely last a lifetime and it’s practically maintenance-free.  Metal roofs offer many advantages, such as design flexibility, energy efficiency, recyclability and of course, durability.  The main practical advantage of metal roofing is that it lasts for such a long time.  The big question is – how long does a metal roof last?

Metal Basics

While most metal roof warranties provide around 50 years of coverage, several metal roofs have been known to last over 100 years.  Your roofs longevity will be affected by many factors, including the type of metal used.  There are several types of metal roofing available these days.  Copper and zinc roofs typically cost the most and last the longest.  Some popular choices are pre-painted steel and aluminum, which typically have a 40-50 year warranty.  Bare galvalume steel has been reported to last up to 60 years.  Quality PVDF paint coatings are usually warranted to last 30-40 years.

Longevity Factors

Local environmental conditions vary considerably and these conditions will affect how long your metal roof will last.  For example, a metal roof located within 1500 ft. of salt water may deteriorate faster if not maintained with a bi-annual tap water rinse.  Proper installation is a crucial factor in the longevity of your metal roof, including proper use of underlayment, fasteners, flashings and high quality caulking.  All things considered, properly installed metal roofs do not rot, crack, warp or curl and can withstand harsh environmental conditions for many many years -that’s what they do best.

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