Metal Roofing Over Asphalt Shingles: Benefits, Considerations, and Installation Guide

Benefits of Metal Roofing Over Asphalt Shingles

Installing a metal roof over asphalt shingles has several benefits. Firstly, it saves you money by avoiding the tear-off process of getting a new roof, and it also saves the shingles from going to landfills. Secondly, it provides protection from winds of up to 120 mph without damage, thanks to the framework that is screwed directly to the rafters. This extra layer also provides bonus insulation for your home, lowering energy costs. Finally, the framework creates a flat and straight surface even if the shingles are badly curled or the roof ridge is bowed.

Considerations for Metal Roofing Over Asphalt Shingles

While there are several benefits to installing a metal roof over asphalt shingles, there are also some considerations to keep in mind. Firstly, you won't get to replace crucial roofing materials like the underlayment, which is included in a full roof replacement. These crucial roofing components are not meant to last forever, so it may make repairs difficult in the future. Secondly, local building departments may have restrictions on the number of layers of shingles that can be covered, so it's important to check with them before making any decisions.

The Process of Installing a Metal Roof Over Shingles

If you're looking to install a metal roof over shingles, there are a few steps you need to follow. Firstly, nail or screw the underlayment and battens into the shingles. If the shingles are in decent shape, lay out the underlayment felt flat across the old roof and secure it to the plywood underneath the shingles using a nail gun or nail and hammer. Then, start putting the metal panels into place, making sure to keep everything straight and symmetrical. You can place the screws on either the flat surface or the raised ridges on the roof.

Choosing the Right Type of Metal Roofing

When choosing a metal roof to install over asphalt shingles, you have two options: steel shingle systems or standing seam steel. Steel shingle systems are a popular choice because they are less expensive than standing seam steel. However, standing seam steel is a more durable option that provides a clean, modern look. It's important to weigh the pros and cons of each option to determine which one is best for you.

Safety and Expertise Required for Installation

Installing a metal roof over shingles requires roofing experience and multiple people to ensure safety. It's also important to have special equipment to raise and install the sheets. If you don't have roofing experience, it's not recommended to

attempt the installation on your own, as working on a roof can be dangerous and the consequences of a poor roof installation can be disastrous. It's always best to hire a professional roofing contractor to ensure that the job is done safely and correctly.

Conclusion: Advantages and Disadvantages of Installing a Metal Roof Over Asphalt Shingles

Installing a metal roof over asphalt shingles has several advantages, including saving money on the tear-off process and providing protection from high winds. However, there are also some disadvantages, such as missing out on replacing crucial roofing materials and local building department restrictions. Additionally, installation requires roofing experience, multiple people, and special equipment, making it a time-consuming and potentially costly job.

If you're considering installing a metal roof over asphalt shingles, it's important to weigh the pros and cons and make an informed decision. At Royalty Roofing, we provide free roofing estimates to help you make the best decision for your home. Submit a request for a free estimate today and let us help you protect your home with a sleek and durable metal roof.