How to Install Metal Roofing Over Shingles?

 

Metal roofing is a popular choice among homeowners for its durability, sleek appearance, and energy efficiency. When it’s time for a roof upgrade, many wonder if they can install metal roofing over their existing shingles. The answer is yes! Here’s a step-by-step guide on how to do just that.

Benefits of Metal Roofing

• Durability: Metal roofs can last 40-70 years, compared to asphalt shingles which have a life expectancy of around 20 years.
• Energy Efficiency: They can reflect solar radiant heat, reducing cooling costs by 10-25%.
• Safety: Metal roofing is non-combustible, making it a safe choice for homes.

Preparation is Key

Before starting the installation, there are a few things to keep in mind:

1. Check Local Regulations: Some areas might have restrictions on double roofing.
2. Inspect Your Current Roof: Ensure that your current shingles are in a relatively flat condition. Major irregularities could compromise the new roof’s appearance and functionality.

Steps to Install Metal Roofing Over Shingles

1. Lay the Underlayment: Start by laying down a layer of synthetic roofing underlayment over your shingles. This will provide an extra barrier against moisture.
2. Install Furring Strips: Attach 1×4 or 2×4 furring strips horizontally across the roof, ensuring they are properly spaced according to the metal roofing manufacturer’s recommendations.
3. Begin Panel Installation: Starting from the lowest point of the roof, attach the metal panels using screws. Ensure that they overlap correctly to prevent any potential leaks.
4. Secure Flashing: Install flashing at the edges, valleys, and penetrations to further ensure waterproofing.
5. Install Ventilation: This will prevent condensation and keep the attic space cool.
6. Finish with the Ridge Cap: The ridge cap covers the joint where two roof sections meet, providing both a functional and aesthetic finish.

Important Considerations

• Weight: Metal roofing is lightweight, so installing it over shingles shouldn’t pose significant weight concerns.
• Noise: Some believe metal roofs to be noisier in the rain. However, with proper insulation, the difference in noise is minimal.
• Cost: Metal roofing can be more expensive initially but offers better longevity and durability, often making it more cost-effective in the long run.

Comparison Table

Aspect	Metal Roofing	Asphalt Shingles
Durability	40-70 years	20 years
Cost	Higher initial cost, but long-term savings	Cheaper initially, but may require more frequent replacement
Maintenance	Low	Moderate
Energy Efficiency	High	Moderate

Metal Roofing Materials: Choices Galore!

There are a variety of metal roofing materials to choose from, each offering its own set of advantages:

• Steel: Affordable and durable, steel is a common choice for metal roofing. It’s often coated with zinc or a combination of zinc and aluminum for added protection against rust.
• Aluminum: Lightweight and resistant to corrosion, aluminum is an excellent choice for coastal areas with salty air.
• Copper: Not only is copper durable, but it also offers a unique appearance that changes over time as it oxidizes. While it’s on the pricier side, its long lifespan and unique aesthetic appeal make it a coveted choice for many homeowners.
• Zinc: Known for its ability to self-heal from scratches, zinc roofs can last upwards of 100 years with proper care!

Maintenance Tips for Metal Roofs

To maximize the lifespan of your metal roof:

1. Clean Regularly: Remove leaves, branches, and other debris that can retain moisture and cause corrosion.
2. Inspect Annually: Check for signs of wear or damage and address any issues promptly.
3. Repaint: If you notice the color fading or chipping, consider repainting your metal roof to restore its look and add an extra layer of protection.

In Case of Unexpected Issues

While DIY installation can be rewarding, it isn’t without risks. If you encounter unexpected complications or feel unsure about a step, it’s essential to consult professionals. In San Antonio, many homeowners rely on a San Antonio roofing company for guidance, ensuring that the installation process is smooth and error-free.

Also, if you ever experience a sudden roofing issue that requires immediate attention, don’t hesitate to employ an emergency roof tarp. It’s a temporary solution that can prevent further damage until you can get the issue fixed.

Why Superior Roofing San Antonio?

When considering a roofing upgrade or repair, it’s vital to choose a company with a reputation for excellence. Superior Roofing San Antonio has been serving the community with impeccable craftsmanship and outstanding customer service. Their team of experts ensures that every project, whether big or small, is executed to perfection. Choosing Superior Roofing San Antonio is choosing quality, durability, and peace of mind.

Superior Roofing San Antonio
1318 Walkers Way, San Antonio, TX 78216
(210) 981-3346
info@sanantonio-roofing.com