Skip to Content

Install Metal Roof Over Shingles Furring Strips Full Guide

Metal Roof over Shingles Furring Strips | Important Tips

Metal roofing is a durable and reliable option for many homeowners. It offers protection from extreme weather conditions, as well as resistance to damage from fire or pests.

Furthermore, it can reduce energy costs by reflecting heat in the summer months and insulating against cold air during winter. To get the most out of metal roofing, one must understand how to properly install furring strips over shingle roofs.

Furring strips are thin pieces of wood that provide an extra layer between the underside of a metal roof panel and the existing shingle roof below.

This helps ensure that moisture does not seep into your home through any cracks in the shingles caused by expansion or contraction due to changing temperatures. Furring strips also create a more secure base on which to attach screws when installing metal panels onto your roof.

Installing furring strips over shingles may seem like a daunting task, but with proper planning and knowledge, you can easily complete this job yourself or hire a licensed roofing contractor.

In this article, we will discuss key steps involved in installing furring strips over shingle roofs—including tools required, safety precautions needed, and tips for successful installation—to enable readers to achieve their desired results with confidence and ease.

Steps To Install A Metal Roof Over Shingles Furring Strips

Installing a metal roof over shingles with furring strips is an effective way to protect your home from weather damage. Here’s a step-by-step process…

  • Step 1: Measure the area of the roof that needs to be covered and order enough metal panels to cover the entire surface.
  • Step 2: Cut the metal panels to the appropriate size using a metal saw or snips.
  • Step 3: Install high-quality underlayment over the existing shingles to provide additional protection from the weather.
  • Step 4: Begin installing the metal panels at the lowest point of the roof, ensuring that the panels overlap each other by at least 6 inches.
  • Step 5: Secure each panel using appropriate fasteners such as screws or nails, making sure to place them in the raised portions of the panel to prevent leaks.
  • Step 6: Repeat the installation process for each row of metal panels, overlapping each row by at least 6 inches to create a watertight seal.
  • Step 7: Once all panels are installed, attach furring strips around the perimeter of each panel to provide additional support and prevent wind uplift.
  • Step 8: Seal any gaps or seams between panels using silicone caulk or other appropriate sealant.
  • Step 9: Inspect the roof regularly and make any necessary repairs or maintenance to ensure the longevity of the metal roof.

Furring strips are thin pieces of wood or metal that serve several purposes when installing a metal roof over existing shingles.

They provide additional support for the panels and level out any uneven surfaces on the existing shingle layer beneath them. It’s also a good idea to understand the minimum slope of a metal roof. Additionally, they keep moisture away from the underlying structure and create an airtight seal between both layers of material which helps prevent leaks in extreme weather conditions.

Understanding their significance and proper installation techniques will ensure that your new metal roof provides long-lasting protection against water damage.

Metal Roof over Shingles Furring Strips | Important Tips

Understanding The Significance Of Furring Strips

The use of furring strips when installing a metal roof over existing shingles is an important step in the installation process. Furring strips provide an extra layer of protection to your home and are essential for proper ventilation and insulation. Here are some key points about why furring strips are so significant:

  1. They create a gap between the metal roofing panels and the existing shingle roof, allowing air to flow freely underneath the new material. This ensures that moisture does not become trapped beneath the metal roof, potentially leading to rot or mold growth.
  2. The space created by the furring strips also helps with thermal insulation, as warm or cool air will be unable to easily transfer through this gap. This can help reduce energy costs and keep temperatures inside your home more consistent throughout all seasons.
  3. Furring strips add structural stability to your new metal roof, helping it withstand different weather conditions such as high winds and heavy snowfall without shifting or warping over time.
  4. Finally, they provide additional protection from water damage since any rainwater that gets into the gap is able to drain away safely instead of pooling up against your house’s foundation walls.

Installing furring strips during a metal roof replacement project is highly recommended in order to maximize its effectiveness and longevity while protecting your home from potential damages due to moisture buildup and other weather-related issues.

Without them, you run the risk of costly repairs down the road caused by water seepage or inadequate insulation levels resulting from poor airflow within the attic area above your head.

The role of underlayment in roofing serves as another critical component for ensuring long-term performance of a newly installed metal roof system; understanding these components together allows homeowners to make informed decisions on which type of installation method best fits their needs and budget constraints.

Metal Roof Installation Over Existing Roof Before and After

The Role Of Underlayment In Roofing

Underlayment is an essential element of a metal roof installation. It serves as the protective layer between the shingles and the new metal roof. Tar paper, roofing felt, or rigid insulation are popular choices for this purpose.

Tar paper is often used to provide water resistance when installing over existing shingles. Roofing felt has superior strength and flexibility, making it ideal for use in low-sloped applications.

Rigid insulation can be beneficial if additional R-value is needed for energy efficiency.

When installing a metal roof over existing shingles, underlayment should always be installed first before furring strips are attached to create flat surfaces on which to attach the panels of metal roofing material.

Without proper underlayment, moisture will not successfully drain off the surface of your metal roof system, resulting in potential damage and costly repairs down the line.

Benefits Of Using Crossed Battens For Roofing

Installing a metal roof over existing shingles is made easier with the use of furring strips. Furring strips are thin, long pieces of wood or plastic that act as spacers between the roof sheathing and the new metal roof.

This helps to provide an even surface for the installation of the metal roof panels while allowing ventilation underneath them.

The most common type of batten used in this application is crossed battening, which involves placing two parallel rows of furring strips perpendicular to each other on top of the existing roof sheathing. The advantage of using crossed battens for a metal roof is twofold:

Advantages Of Crossed Battens Benefits To Homeowners
Advantages Of Crossed Battens Benefits To Homeowners
Increased stability & strength against wind uplift forces Safer home from extreme weather conditions
Improved overall insulation performance due to increased air space between panel and substrate materials Lower energy costs through reduced HVAC usage and improved comfort levels within living spaces
This method also provides additional protection against moisture damage by creating an airspace between the underlying sheathing material and the metal panels, thus ensuring proper drainage and ventilation.

Additionally, it increases longevity by providing extra support for any expansion or contraction caused by temperature changes throughout the year. As such, installing a metal roof over existing shingles with crossed battens has several advantages that benefit both homeowners and installers alike.

Crossed battening is one way to ensure a secure installation when replacing an old shingle-covered roof with a more durable, aesthetically pleasing option like metal. It not only strengthens your home’s defense against winds but also improves its thermal efficiency; all without sacrificing style or comfort!

Advantages Of Cross-Battening A Roof

Cross-battening a roof is truly an art form – and one that can provide incredible benefits when done correctly. It’s no exaggeration to say that having the right cross-batten layout can make or break your metal roofing project.

Not only does it ensure proper drainage, but also provides solid support for rigid insulation, along with wind uplift protection – all while creating an aesthetically pleasing look to your structure.

When choosing the right system for your needs, there are several important considerations that must be taken into account.

First off, you need to ensure the structural integrity of your installation in order to meet local building codes.

Secondly, you need to consider how well the system will perform over time as it pertains to water leakage and weather resistance.

Finally, look at how effectively each type of cross battens can be installed without compromising other components of the roofing system like underlayment or flashing details.

By taking all these factors into consideration prior to beginning your project, you can maximize efficiency during installation and create a long-lasting metal roof that looks great and performs even better!

With careful planning and precise execution, crossed battens are sure to become a welcome addition on any rooftop — providing much needed security from both Mother Nature and Father Time alike.

Potential Drawbacks Of Cross Battening A Roof

Cross battening is a popular method for installing metal roofing over wood shingles. It involves attaching furring strips directly to the sheathing with nails and then installing the metal panels on top of them. While this approach can be effective in some situations, it also has several potential drawbacks.

First, there is an increased risk of condensation due to lack of proper insulation between the two layers of material. If not properly insulated, moisture may accumulate under the metal panel, leading to mold growth or other issues.

Additionally, if cross-battening is used without adequate ventilation, heat buildup can occur which could cause damage to both the underlying wood shingles and any rigid insulation that was installed.

In order to avoid these problems, homeowners should ensure they use appropriate methods when planning their installation project such as using foam board beneath their metal roofing and providing adequate attic space for air circulation.

Furthermore, before beginning any type of construction work related to cross-battening it is important to consult with a professional installer who understands the correct techniques for ensuring that your new roof will remain safe and efficient for years to come.

Frequently Asked Questions

What Is The Average Cost Of Installing A Metal Roof Over Shingles?

Installing a metal roof is an important decision for any homeowner. It requires careful consideration of the cost, materials, and installation methods to ensure that it meets your needs.

The average cost of installing a metal roof over shingles may vary depending on several factors such as the type of material used, the size of the roof, and local labor costs.

When installing a metal roof over existing shingles, furring strips are typically used to provide additional support for the panels. This method can be more expensive than other options because it requires additional labor and materials.

However, this approach offers superior protection against moisture damage compared to other alternatives. In addition, it provides greater flexibility in design options by allowing homeowners to customize their roofs with various colors and textures.

Additionally, metal roofs offer excellent durability and resistance to fire or extreme weather conditions making them an ideal choice for many homeowners.

Metal roof installation is not something that should be taken lightly; due diligence must take place prior to committing to the project.

Research into different types of materials, local contractors who specialize in metal roof installations and the availability of financing options all play an important role when considering which option is best suited for your home.

With proper planning and research you can rest assured knowing you have made an informed decision about one of the most significant investments you will make in your lifetime – investing in a new metal roof!

Can A Metal Roof Over Shingles Be Installed On Any Type Of Roof?

Have you ever wondered if a metal roof can be installed on any type of roof? This is an important question to consider when deciding whether or not to install a metal roof over shingles.

Installing a metal roof in this manner requires some special considerations, and it’s important to understand the differences between different types of roofs before selecting the best option for your home.

The first step when considering installing a metal roof over shingles is to determine what kind of existing roof structure is underneath the existing shingle material.

Many factors need to be taken into account including the overall condition of the underlying materials, as well as any additional support that may be required such as furring strips or other reinforcements.

Generally speaking, most roofs are suitable for installation of a metal roof over shingles; however, certain structures may require additional work or reinforcement in order to ensure long-term stability and reliability.

Additionally, understanding local building codes and regulations will also help homeowners make sure their project meets all requirements before beginning construction.

It’s important to note that while it is possible to install a metal roof over existing shingles, there are several advantages associated with starting from scratch rather than replacing one material with another.

Taking care during the selection process ensures that any issues related to compatibility of materials are addressed upfront and can save time and money down the line.

Ultimately, careful planning and research beforehand will reward homeowners who want enjoy durable protection from their new metal roof without having to worry about potential problems in its future performance.

How Long Will A Metal Roof Over Shingles Last?

Installing a metal roof over shingles can be a great way to extend the life of your existing roof. But how long will it last? The answer depends on a variety of factors, including materials and installation techniques used as well as environmental conditions.

When considering installing a metal roof over shingles, there are several important points to consider:

  • Material quality – Choose thicker material for better durability and longevity. Avoid lightweight metals such as aluminum or tin which may corrode quickly in certain environments.
  • Installation technique – Proper installation is key when laying down a metal roof over an existing layer of shingles; make sure that all nails are sealed properly and any seams between panels are tightly joined together with sealant.
  • Ventilation needs – Make sure that adequate ventilation is provided under the new metal rooftop so moisture can escape before condensation forms underneath the surface.
  • Weather exposure – Different parts of the country experience different weather patterns and climates; selecting the right type of metal for where you live is essential to ensure maximum lifespan from your new roof.
  • Maintenance schedule – Regularly inspect your metal rooftop for signs of damage or wear, and repair any areas immediately to avoid further damage down the line.

The combination of excellent material quality, proper installation techniques, suitable ventilation needs, appropriate weather resistance, and regular maintenance will help ensure that your newly installed metal rooftop lasts for years to come—giving you freedom from worrying about replacing your old shingle-based roof anytime soon!

What Type Of Maintenance Is Required For A Metal Roof Over Shingles?

A metal roof is a great way to protect your home from the elements, but it requires maintenance in order to stay in good condition.

The task of maintaining a metal roof over shingles can be daunting, but with proper care and attention, it can last for many years without needing repairs or replacement. We will discuss what type of maintenance is required for a metal roof over shingles in order to keep it looking its best.

Like anything else exposed to the environment, metal roofs need regular cleaning and inspection.

This should include removing any debris that has accumulated on top of the shingles such as leaves and twigs; checking for signs of wear and tear such as rust spots or dents; and inspecting fasteners used to hold down the roof covering materials.

Additionally, you may want to check sealant around flashings and other openings periodically as well. It’s also important to inspect flashing at least twice a year since they are prone to developing leaks when left unchecked.

Regularly scheduled inspections by an experienced professional are essential for keeping a metal roof secured tightly against the elements over time.

An expert can identify potential problems early on before they become major issues requiring costly repairs or replacements.

Furthermore, these professionals can offer helpful advice about how often certain tasks should be completed based on the climate where you live and type of material used on your roof coverings.

Following their recommended maintenance schedule will ensure your metal roof lasts for many years without needing too much work done on it beyond routine cleanings and inspections.

Is It Possible To Install A Metal Roof Over Shingles Without Furring Strips?

Installing a metal roof over shingles is possible, but the use of furring strips is necessary to ensure proper installation. Furring strips are narrow boards that provide an air space between the roof and the siding material.

This helps improve insulation, which can reduce energy costs in cold climates. It also prevents water from pooling on top of the shingles and damaging them.

The benefits of installing a metal roof over shingles include:

  1. Improved durability – Metal roofs are more durable than traditional asphalt roofing materials, providing long-term protection against hail, snow, wind and other harsh weather conditions.
  2. Increased energy efficiency – By increasing insulation value with furring strips, homeowners can save up to 40% on their annual heating and cooling bills by reducing heat transfer through the attic area.
  3. Enhanced property value – A well maintained metal roof can increase your home’s market value making it easier to sell should you decide to move in the future.

It is important to note that maintenance will still be required even when using a metal roof over shingles with furring strips as rust accumulation or improper ventilation could cause damage if not addressed quickly enough.

Homeowners should inspect their roofs at least twice annually for signs of wear or corrosion and have any problems repaired promptly by an experienced professional contractor who specializes in metal roofs.

Furthermore, it is recommended that homeowners clean debris off their roofs regularly to prevent moisture buildup which could lead to mold growth or rot beneath the surface of your new metal roof.


The installation of a metal roof over shingles is becoming an increasingly popular choice for homeowners looking to upgrade their roofs. While the initial cost may be higher than traditional shingle installations, the longevity and durability of a metal roof make it a worthwhile investment.

In addition, while furring strips are necessary in most cases when installing a metal roof over shingles, there are some alternative methods that can reduce costs and provide additional flexibility.

When properly installed by an experienced contractor, a metal roof over shingles can last for decades with minimal maintenance required.

Not only does this mean less time spent on regular upkeep and repairs, but also lower energy bills due to greater insulation as well as improved protection from extreme weather conditions such as hail or strong winds.

Furthermore, many types of metal roofs come with warranties lasting up to 50 years or more depending on the manufacturer’s specifications.

All in all, installing a metal roof over shingles is not only an economical option for upgrading your home’s exterior look but also provides added peace of mind knowing you have invested in reliable long-term protection against harsh elements.

With careful consideration given to both short-term and long-term costs along with different installation techniques available, one should be able to find the perfect solution that fits their individual needs.