Metal Roofing Over Shingles: What You Need to Know Before Making the Switch

Mar 20, 2024

When it comes to choosing the right type of roof for your roof replacement, metal roofing is a great option. In fact, metal roofs have become increasingly popular in recent years thanks to their unparalleled durability, energy efficiency, and lifespan. But, what if you already have an asphalt shingle roof installed on your home—is it possible to have a metal roof installed over it? The short answer is yes, but there are several factors to consider before you do so. Let’s take a closer look at some considerations you should make.  

Why Metal Roofing Makes Sense

To begin, understanding why metal roofing is a good option for your home is a must for anyone considering having it installed. Metal roofing offers unparalleled durability. It is able to withstand inclement weather conditions without becoming easily damaged. Metal roofs also typically have a longer lifespan than what’s typical of asphalt shingles. And, because they reflect the sun’s heat, metal roofs can help to make your home more energy efficient and potentially lower your monthly energy costs.

Factors to Consider Before Installing a Metal Roof Over Asphalt Shingles

The first thing you should do before having a metal roof installed over shingles is to assess the condition of your existing roof. If the shingles are visibly damaged, you’ll likely need to have them removed before you can have it replaced with a metal roof. However, if no visible damage is present and the roof is in good condition, installing a metal roof on top of it might be a viable option.  

Additionally, you’ll want to be sure you understand the local building codes regarding any restrictions on roofing materials and installation methods.

Furthermore, the weight of the roof is critical to consider when deciding if installing metal roofing over shingles is a good option for your home. While metal roofing is typically lightweight when compared to other types of roofing, installing it over shingles increases the load and stress placed on your home. It may be wise to consult a structural engineer to determine if your home can support the weight.

What to Expect When Installing Metal Roofing Over Shingles

When installing a metal roof over shingles, one of the first steps is to usually place a layer of insulation over the shingles. Then, the metal panels or shingles are attached to the existing roof. This method is less costly and time-consuming than what’s required of a full roof replacement since there’s no need to remove the existing shingles.

FAQs About Metal Roof Installations

For more information on metal roof installations, check out the answers to some frequently asked questions below.

Can a metal roof be installed over several layers of shingles?

Typically, a metal roof can only be installed over a single layer of shingles. Installing a metal roof over multiple layers can compromise the integrity of the roof and lead to leaking and other damage.

Will having a metal roof installed make my home hotter?

Metal roof is extremely reflective, so it doesn’t absorb the sun’s heat. Having a metal roof installed can actually help to make your home more energy efficient.

Does a metal roof last longer than shingles?

Metal roofing has been known to last 50 years or more when properly installed and maintained. On the other hand, asphalt shingles have a typical lifespan of 20 – 30 years.

Expertly Installing Metal Roofs

ALL-TIMATE ROOFING is the team to call when you want to have metal roofing installed at your home. We bring unmatched skill and experience, and we can help to determine the best method of installation for your metal roof. To get started, contact us today and speak with a member of our team.