What is Metal Over Metal Reroofing? (and When Is It Needed?)
Metal roofs are a durable option known to last 60 years or more. However, there will come a time when a replacement is necessary. The roof may not be performing well, or it may show signs of damage.
Roof replacements are expensive. Businesses can save money with metal over metal reroofing. Rather than replace the roof, a new metal roof is installed on top of an existing roof, reducing costs and speeding up work processes.
IN THIS ARTICLE:
What is Metal Over Metal Reroofing?
Advantages of Metal Over Metal Reroofing
What Types of Metal Roofs Can Be Reroofed?
When is Metal Over Metal Reroofing Needed?
How Butler Builder Products Enhance Reroofing
Metal Over Metal Re-Roofing vs. Roof Replacement
Why Choose Seufert Construction for Your Reroofing Needs
What is Metal Over Metal Reroofing?
Metal over metal reroofing involves placing a new metal roof over an existing one. Various processes can be used to reroof, including:
With Framing: This process involves using retrofit purlins to recover existing exposed fastener roofs. It is a well-tested method that enhances roof strength with the most attachments to the existing structure. However, it also uses more materials, increasing costs and potentially raising environmental issues. It is also not recommended for wood decks, bar joists, and metal decks with rigid installation.
Hat Over Zee Clip: This method involves attaching a Zee clip through the panel's flat to the substructure below. It is a moderately priced option that can increase the roof's thermal performance. However, it yields less structural attachment than other methods.
Criss-Cross Grid: Contractors install two layers of red iron to the existing roof to enhance the structure. The process improves the roof's longevity and energy efficiency but requires extensive labor and material, making it expensive.
Frameless: This system fills the existing roof with rigid insulation. A second layer or cover board may be applied for additional reinforcement. The process is watertight and improves insulation. However, detailed insulation work is required and may be expensive. It works best for low-floating seamed roofs and exposed fasteners.
Tall Clip: This system is used exclusively for standing seam roof panels. A tall clip holds the new panel over the existing building. It does not require additional framing, but insulation is limited.
Advantages of Metal Over Metal Reroofing
A reroof and retrofit process offers many advantages, including the following:
Cost-Effective Reroof Solutions: Processes to reroof existing metal roofs vary. However, the processes are more affordable than a complete roof replacement. They eliminate labor costs related to removing the existing roof. Metal roof retrofitting also minimizes permitting needs and expenses.
Increases Durability and Insulation: Business owners who choose metal over metal reroofing benefit from two roof layers. As a result, they can enjoy a more durable structure and increased energy efficiency that can save money in the long run.
Faster Process: Without replacing, businesses can enjoy a quicker installation process. They will not have as many disruptions due to noise and closed-off areas. Companies can conduct business smoothly and enjoy a new roof system sooner.
Exempt from the International Energy Conservation Code (IECC): Roof replacements must bring the building to current insulation requirements. Yet the IEEC does not issue existing standards for insulation additions, making it difficult for contractors to achieve that goal. Metal over metal reroofing is not a replacement, freeing contractors from meeting an unknown standard and supporting a smoother process.
What Types of Metal Roofs Can Be Reroofed?
Most metal roofs can be reroofed, including steel, aluminum, zinc, copper, standing seam, corrugated metal, metal shingles, and stone-coated steel. However, if the roof is significantly damaged, it may not be strong enough to support reroofing. A replacement may be necessary.
Butler systems can address most roofing issues and recommend the best reroofing method.
When is Metal Over Metal Reroofing Needed?
A metal-over-metal reroofing can address most issues that would otherwise qualify for a roof replacement. These include:
The Paint Finish Has Outlived Its Lifespan: Most standing seam roofs feature a paint finish that protects metal from the elements and prevents the color from fading. A typical metal roof finish has a 10-15 year lifespan. After reaching this mark, your roof will be vulnerable to damage and may require reroofing or replacement.
Rusting or Extreme Fading: Your roof may not require a reroof and retrofit the day your paint finish reaches the 30-year mark, but if you notice signs of rust and extreme fading, you know the protective paint is no longer effective.
A Damaged Paint Finish: The paint finish could become damaged before the 30-year mark due to objects falling on the roof or accidents when other roof work is performed. This type of damage calls for reroofing.
Storm Damage: Damage can also impact the panels themselves. They may become damaged due to storms, falling trees, and other acts of God. Fortunately, these types of damage are typically covered by insurance.
Fasteners Wear Out: Screw-down roofs are held in place by screws reinforced with rivets. Over time, the fasteners stretch with roof expansion, causing gaps and potential leaks. Screws should be replaced every five to ten years to compensate for enlarged holes, but eventually, this may no longer be a viable solution.
How Butler Builder Products Enhance Reroofing
Reroofing tends to be an effective solution, leading to cost savings, enhanced insulation, and durability, but you will experience the most impact by using quality products. Seufert Construction uses Butler Builder products to ensure the best outcomes.
The Butler Manufacturing MR-24 Conventional Roof System is the industry's leading roof system. It offers an extended service life of 60 years. Its double lock seam ensures precision engineering. The unique protective plate ensures insulation is not damaged during installation. The system also offers water and vapor protection and is covered by a comprehensive warranty.
When incorporated in reroof and retrofit, the MR-24 offers 90% maintenance savings compared to conventional roof materials. Seufert is proud to be part of the Butler Builder network, a team of experts that have retrofitted countless roofs with optimal cost-effectiveness and efficiency.
Metal Over Metal Re-Roofing vs. Roof Replacement
Metal over metal reroofing is the best solution compared to roof replacement alternatives. This section will review significant factors that may guide your decision.
Cost: Metal over metal reroofing typically costs $6.75 to $9.25 per square foot. A roof replacement can cost as much as $40 per square foot.
Longevity: Metal roofs can last close to 60 years. However, when you factor in paint finish wear on standing seam roofs, the lifespan reduces to 30 years. Once an overlay is added, you may not encounter significant issues for another 60 years. You can expect enhanced durability when using Butler products.
Time: Both roof replacement and metal re-roofing can be time-consuming, especially when performed on industrial or commercial buildings. However, reroofing is typically completed in less time as the removal process is eliminated and permitting is not required. Businesses can complete re-roofing projects sooner and get back to providing excellent service.
Why Choose Seufert Construction for Your Reroofing Needs
Seufert uses quality Butler products for metal-on-metal reroofing purposes, but that's not all that sets us apart. We offer comprehensive services, including building, designing, and construction management. Our team negotiates time and materials to work within your budget and reach deadlines. We can partner with qualified contractors and material providers to create a competitive quote for your building needs.
Ready to upgrade your roof without the hassle of a complete replacement? Contact Seufert Construction to learn how metal-over-metal reroofing can benefit your building.