When it comes to home renovations, especially roofing, you may face the dilemma of replacing your shingles or installing a new metal roof over them. The question, “Can you put metal roofing over shingles?” is common, and the answer isn’t a simple yes or no. This comprehensive guide provides all the information you need to make an informed decision about installing metal roofing over shingles.
We’ll discuss the reasons for considering metal roofing, the drawbacks, and all the considerations you must consider before deciding. Read ahead to learn more from our experts!
Why Consider Metal Roofing Over Shingles?
Before answering whether you can put metal roofing over shingles, you have to understand why you might want to choose metal roofing in the first place. Metal roofing offers several benefits:
- Depending on the material, metal roofs can last 40-70 years. They resist harsh weather and withstand winds up to 140 miles per hour.
- Metal roofs reflect solar radiant heat, reducing energy costs by 10-25%.
- Metal roofs are 100% recyclable at the end of their life cycle.
- Metal roofing is available in various styles and colors and imitates other roof types.
Shingle roofs, while popular, come with several disadvantages, like:
- Shingle roofs typically last 15-30 years, significantly less than metal roofs.
- They require more maintenance and are more susceptible to damage.
- Shingles absorb heat, which can increase cooling costs in the summer.
So, Can You Put Metal Roofing Over Shingles?
The simple answer…
Yes, you can install metal roofing over shingles, but it has several considerations and potential complications. Many building codes allow it, but specific conditions and steps must be followed to install it properly.
What to Consider Before Installing
Remember the following details before trying to replace your shingle roof with metal roofing.
Local Building Codes
Before starting any roofing project, check your local building codes. Some areas have regulations that limit the number of roofing layers or require specific installations.
Roof Condition
Inspect the condition of the current shingle roof. It should be in relatively good shape, with no major issues like significant leaks, rotting wood, or structural problems. If the shingle roof is in poor condition, remove it before installing a new metal roof.
Weight
Metal roofing is lightweight compared to other roofing materials, but adding any additional layer can affect your home. Make sure that your roof structure can support the added weight of a metal roof over shingles.
Potential Disadvantages and Risks
As with all roofing materials, metal roofs also have some disadvantages.
- Moisture can potentially become trapped between the layers. If not properly managed, this can lead to mold, rot, and structural damage.
- Shingles create an uneven surface for metal roof installation. While it’s not usually a major issue, it can complicate the installation process and affect the appearance of the finished roof.
- With shingles left in place, inspecting the underlying roof structure in the future can be difficult, so more damage may go unnoticed.
Conclusion: Is It Worth It?
Can you put metal roofing over shingles? The answer is yes but with careful consideration of the factors involved. The benefits of saving costs, insulation, and recyclability make it a good option. Keep potential risks in mind before proceeding with the replacement process, and follow all local building codes.
If you’re unsure about taking on a monumental project, consult with professional roofing contractors like Select Renovations. We’ll inspect the condition of your existing roof, work with your budget, and offer long-term solutions.