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Can You Put a Metal Roof Over Shingles?

October 30, 2025

For those looking to purchase a metal roof, you can put a metal roof over shingles. Many homeowners do this to save time and money. Instead of tearing off the old shingles, the metal roof can be installed right on top. This makes the job faster, cleaner, and less expensive. Metal roofing is becoming more popular because it’s strong, long lasting, and looks good on almost any house. However, it’s important to understand the benefits, the possible problems, and what needs to be done to make sure the new roof lasts for many years. Trusting a local service provider like Cover All Exteriors will provide you the best outcome for your roofing project.

One big reason people choose to install a metal roof over shingles is that it saves money and work. Removing old shingles can take a lot of time and cost more for labor and cleanup. By putting the metal roof right over the old shingles, you skip all that. You also avoid sending a lot of old roofing material to the landfill, which is better for the environment. Another bonus is that the shingles already on the roof can add a bit of extra insulation and soundproofing. This helps keep your home warmer in the winter, cooler in the summer, and quieter during heavy rain or hail.

Before putting a metal roof over shingles, you need to make sure the old roof is in good shape. If the shingles are falling apart, missing, or curled up, they might not give the metal roof a flat, solid base. In that case, you may need to fix or replace some parts before moving forward. Also, if there are already two layers of shingles on your house, adding a third layer could break local building codes. Most places only allow two layers total, so it’s important to check that first. You should also inspect the roof decking, which is the wood under the shingles to make sure there’s no rot, mold, or sagging. If there is, that has to be repaired before the new roof goes on, because a metal roof needs a sturdy foundation to last.

Ventilation is another important part of the job. When you put a metal roof over shingles, air can get trapped between the two layers. This can cause heat and moisture to build up, which may lead to mold or rust over time. To prevent this, many roofers use special strips of wood called furring strips, or they add a ventilated layer between the shingles and the metal panels. This helps air move freely and keeps the roof dry. Good ventilation also helps keep your attic cooler in the summer and can lower energy bills.

You should also think about what type of metal roof you want. Standing seam metal roofs are one of the best options because they have tall, interlocking panels that keep out water and wind. Corrugated metal roofs are another good choice they’re cheaper and easier to install but still last a long time. No matter which style you choose, make sure it’s made from quality materials with weather resistant coatings to stop rust and fading.

Overall, putting a metal roof over shingles can be a smart and affordable way to upgrade your home. It saves money, looks great, and can last 40 to 70 years if installed right. Just make sure your old roof is solid, there’s good ventilation, and the work meets local building codes. Hiring a trusted roofing professional such as Cover All Exteriors is the best way to make sure your new metal roof is safe, durable, and ready to protect your home for decades. If you are thinking about a new metal roof, contact us now for a free estimate.

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