Technically, yes. Our opinion, no. Adding more layers can hide any damage to your existing roof. Water spots, mold, rot. All of that is covered up. You'd hate to have to remove your new metal roof a few years down the road for a costly fix to the old roof that's not even on display.
You also run the risk of water vapor building up in between the new and old roof, resulting in new mold and rot issues. Another layer can also raise the temperatures in your attic.
#2 What is that white residue on my metal roof?
That's called chalking. Over time as your metal roof is exposed to UV rays, oxygen, and pollutants, the resin on the metal panels starts to deteriorate. Those degraded resin particles turn white. When you swipe your finger across the roof, it almost looks like chalk.
In Florida, living close to the coast can speed up the chalking process as your metal roof is exposed to the constant flow of saltwater air.
#3 Can you paint a metal roof?
Absolutely, but there are things to keep in mind. First, if your metal roof was recently installed, you should wait at least six months for it to weather properly or the paint won’t stick to the resins.
Be careful about the paint you use. Paints designed for metal roofing contain unique qualities, like heat or fire resistance. These types of finishes are called PVDF (short for polyvinyldenefluoride). They are resistant to fading and chalking.
#4 Which color fades the least?
There are certain colors that last longer due to their pigment concentration and chemical composition. Lighter colors made up of inorganic compounds - your whites, tans, beiges, and sand shades - are more resistant to fading compared to your darker colors.
Matte paints are also less likely to fade compared to glossy paints.
#5 Why is a metal roof more expensive than shingles?
Depending on the type of metal, the panels themselves are actually cheaper than shingles. It's the installation that causes the price to increase. There's much more equipment and preparation involved in metal roof installation than asphalt roof installation.
Even with that said, the overall price comparison between metal and shingles isn't astronomical.
#6 Will a metal roof interfere with Wi-Fi?
In the majority of cases, no. But it can happen, especially if you already have a weak signal. Just be sure to investigate other potential causes before blaming the roof.
#7 Is a metal roof loud when it rains?
In a house with insulation, attic space, and other materials to help deaden the sound, the sound of rain hitting a metal roof isn't loud at all. In fact, it can be just as quiet as most other roofing types.
#8 Why is my metal roof sweating?
That's condensation. It's a result of the difference in temperature between the inside and outside of the home. Warm air on the inside rises and gets trapped in a cavity beneath the roof and forms water vapor. When the vapor cools, it turns into liquid.
Proper ventilation and insulation can help to prevent condensation
#9 Can I install solar panels on my metal roof?
Yep. Metal roofing is actually ideal for solar panel installation due to its durability.
#10 Will a metal roof scratch?
While metal roofing is a durable product, it can still scratch during the construction process or throughout its lifespan. But whether it's a small scratch or a deep gauge, it can be repaired.
During the construction process, workers will usually use a paint pen to touch up any minor scratches caused while walking around and installing the panels.
Storm damage can potentially cause deep gauges in the metal roofing. It's important to immediately contact your metal roofing contractor so they can assess and repair the damage. If a deep gauge in a panel is left untreated, the material can quickly corrode.
CG Roofing inspects, installs, and repairs metal roofing for residential, multi-family, and commercial properties. If you live in Jacksonville, Orlando, or Tampa areas, call or message us today.
CG Roofing is a bonded, licensed, and insured roofing company specializing in commercial roofing services.