Can a metal roof be installed over the shingles? In case you are planning to upgrade your roof. The answer to this is yes. In most instances, it can. A metal roof can be installed on top of an existing roof, thus saving time and money and limiting the disturbance to your home. Nevertheless, it is not the appropriate solution for every roof.
This blog discusses installing a metal roof over shingles, its effectiveness, drawbacks, and when it is most appropriate to use this type of roof.
How Metal Roofing Over Shingles Works
One way to save time and provide effective, durable protection is to install metal roofing over the existing shingles. Contractors do not tear down the old roof; rather, they examine the shingles to ensure they are flat, secure, and free of moisture damage. If the shingle roof is in good condition, it can provide a strong foundation for the metal system.
This is done by applying a protective underlay or by installing a framework of furring strips over the shingles. The layer provides a smooth surface and enhances ventilation. The metal panels are then fitted onto them with great care and fixed to the top using special fasteners that resist leaks and can expand and contract.
An example of the advantages of this approach is increased insulation. The shingles added will provide additional fire resistance and noise insulation and make the house more energy-efficient. Installing metal roofs in this manner also prevents a complete tear-off, reducing waste in landfills.
Benefits of Installing a Metal Roof Over Shingles
Cost Savings
The first one is the ability to save money on labor and disposal. Demolishing the old shingles is time-consuming and incurs dumpster charges. Over shingles eliminates these expenditures.
Faster Installation
The tear-off process is not available; hence, the installation is faster. This saves time on labor and minimal inconvenience to your day-to-day schedule.
Less Mess
By retaining the old shingles, you will reduce the amount of nails, debris, and dust in your premises. This cleaner and safer method improves the process.
Improved Insulation
The shingles present create an additional layer between your house and the metal roof. This can help reduce energy consumption and noise during rain.
When Installing Over Shingles Is Allowed
The use of metal roofing over shingles is permitted in many local building codes, subject to certain conditions. The majority of the codes have restrictions on existing roofing layers. The shingles should normally have only a single layer underneath them.
The roof is also supposed to be well-maintained. In the case of damaged or hanging decking, shingles must be removed before installation.
When You Should Not Install Over Shingles
Structural Damage
In case the roof deck is rotten, mouldy, or unsound, over-shingling will not be safe. These problems have to be corrected initially.
Uneven Shingles
Old or curled shingles may provide an irregular metal roof. This can affect appearance and performance.
Multiple Shingle Layers
Most building codes would require a complete tear-off, followed by the installation of metal, if there are two layers of shingles on your roof by then.
Poor Ventilation
Ventilation may not be planned, so adding a metal roof on shingles may entrap heat. This can reduce the roof’s life cycle.
Types of Metal Roofs Suitable for Installation Over Shingles
Metal roofs do not always go well over shingles. The most appropriate alternatives are:
- Standing seam metal roofs
- Corrugated metal panels
- Metal roofing systems that are ribbed.
These constructions permit the free circulation of air and remain firmly fixed when properly constructed.
Noise Concerns: Is Metal Roofing Loud?
The greatest concern for many homeowners is that metal roofs are noisy. The fact is that a metal roof will not be any louder than asphalt shingles. The current shingles are designed to absorb sound, so rain and hail are not heard as much.
Longevity and Performance
A metal roof over shingles provides good durability and effectiveness when properly installed. Metal roofs have a history of durability that can be estimated at 40 70 years, compared with the conventional asphalt shingles. The layer of existing shingles added provides additional protection for the building, minimizing heat and sound transfer caused by rain or wind. This stratified system will enhance overall energy savings and indoor comfort.
Another significant strength is performance. Metal roofs are tough and withstand cracks, warping, fire, and extreme weather, including heavy rain, snow, and high winds. They also shed water quickly, reducing the risk of leaks and ice dams. Moisture build-up would not be a problem as long as it is installed and well-ventilated.
Basic maintenance and a regular check-up are the keys to long-term results. Overall, the performance of metal roofing on shingles is dependable; it lasts longer and provides high-quality protection for residential houses.
Energy Efficiency Benefits
Metal roofs also reflect the sun, keeping the homes cooler during hot seasons. This, combined with the additional insulation provided by the shingles beneath, may result in higher indoor comfort and lower energy bills.
Importance of Professional Installation
The knowledge of roofing over shingles with a metal roof should be done carefully. Poor installations may result in moisture, ventilation, or structural stress.
A trained roofer will also check your roof, examine local building codes, and perform other tasks to determine whether your home qualifies for this approach.
Final Thoughts
Therefore, is it possible to install a metal roof over shingles? Yes, it is a smart and cost-effective alternative in most instances. It saves time, minimizes wastage, and offers permanent protection. The condition of the roof, local codes, and appropriate installation make a significant contribution to success, though.
Always consult the roofing professionals before making any decisions, as they can inspect your roof and provide a safe option.
When you opt to use Domi Roofing, you are sure that the screwing of your metal roof will be done with care, skills, and long-term performance in consideration.