Installing a Metal Roof: Should Old Shingles Be Removed?

Installing a Metal Roof: Should Old Shingles Be Removed?

If your residential roofing system is nearing the end of its service life, it’s time to think about replacing it. While asphalt shingles remain the top choice in the residential sector, metal is quickly gaining popularity. Read on as Mascon Inc. explains how the process of installing a metal roof works.

Metal Roofing Over Existing Shingles

One reason homeowners choose metal roofing is that many types of metal roofs can be installed directly over existing roof shingles, from asphalt shingles to wood shakes. This has the potential to save time and expenses, as well as avoid adding more waste to landfills. Take note, however, that this isn’t possible for all metal roofing products. Standing seam metal panels, for instance, often require a smooth, flat deck as a substrate.

Considerations for Both Options

Your local roofing contractor may recommend tearing off your old shingles before installing a metal roof if any of the following conditions apply:

  • Rough or uneven asphalt shingle roof will affect the metal roof’s appearance.

  • The deck sheathing show signs of rot and would require repairs. 

  • Local building codes restrict new metal roof installation over too many layers of existing roofing.

  • Nails and screws for the metal roof won’t reach far enough into the layers of existing roofing.

Installing a metal roof over an existing asphalt shingle roof covering works best under these conditions:

  • The existing roof has one or two layers, allowing nails and screws to be driven down and help keep the metal roof secure.

  • The deck sheathing beneath the roof covering is damage-free.

  • There are no irregularities on the roof surface.

  • There are no local building codes restricting this type of installation.

For your roofing needs, turn to MASCON Inc. Equipped with the finest tools and products, our team of professional roofers top-of-the-line products backed by expert workmanship. Give us a call today at (512) 376-5096 to get started. You may also fill out our contact form to request a free quote. We serve Austin, TX, and the surrounding areas.