How to Install Metal Roofing: A Comprehensive Guide
By The Real Metal Roofing Company
Metal roofing offers unmatched durability, often lasting up to 50 years, but installing it can be a challenging task, especially for the DIY enthusiast. While installing a metal roof can save you a substantial amount of money, there are numerous considerations to keep in mind, from building codes to safety precautions. Whether you’re a seasoned contractor or a homeowner with a passion for DIY projects, this guide will walk you through the process of installing a metal roof.
Working Time:
Full Day to Multiple Days depending on the complexity of the roof and your expertise.
Skill Level:
Advanced – Metal roofing installation is not recommended for beginners.
Project Cost:
- DIY Installation: $2,000 to $5,000
- Professional Installation: $5,000 to $12,000
Why Choose Metal Roofing?
Metal roofs are known for their durability and ability to withstand harsh weather conditions, from heavy rain to snow and even strong winds. Moreover, metal roofing requires minimal maintenance and can last for over five decades, making it a valuable long-term investment.
However, metal roofing does have its downsides. It’s often noisier during rainstorms than traditional asphalt shingles, and some people find the aesthetic less appealing. Despite these minor drawbacks, its strength, longevity, and energy efficiency make it an excellent choice for those looking to invest in a roof that will stand the test of time.
When to Install Metal Roofing
If your home has suffered frequent roof damage from weather conditions or if you’ve had to repair or replace your roof multiple times in a few years, it might be time to consider installing a metal roof. Metal roofing is not only durable but also provides excellent protection against severe weather.
Make sure to check the weather forecast before starting. A few days of clear skies are ideal since you don’t want rain complicating the installation process or damaging exposed parts of your home.
Safety Considerations
Since metal roofing involves working with heavy materials and operating at heights, safety should always be a top priority. The following safety gear is essential:
- Safety Goggles: Protect your eyes from metal shards or dust.
- Work Gloves: Metal sheets can have sharp edges. Gloves will protect your hands.
- Safety Harness: Essential for preventing falls while working on a sloped roof.
- Proper Footwear: Non-slip work boots with good traction.
- Roof Jacks and Brackets: To secure your footing while working.
- Watch for Obstacles: Be aware of tree branches, electrical wires, and other hazards while on the roof.
- Consult Building Codes: Make sure you’re aware of any local building codes that pertain to metal roof installation.
Tools and Materials Needed
Tools
- Work gloves
- Work boots
- Safety harness
- Circular saw
- Tape measure
- Chalk line and reel
- Drill
- Screw gun
- Claw hammer
- Ladder
- Tin snips
- Utility knife
- Pry bar
Materials
- Metal roofing panels
- Underlayment
- Drip edge
- Flashing
- Roofing screws
- Wood screws
- Silicone sealant
- Sealant tape
- Closure strips
Instructions for Installing Metal Roofing
Step 1: Measure Your Roof
Before you can install your new metal roof, you need to accurately measure your existing roof to ensure you purchase enough material. Follow these steps:
- Measure the length, width, and rise of each section of your roof.
- Use the measurements to calculate the slope. The slope is determined by dividing the rise by the run (the horizontal distance across the roof).
- Once you have the slope, calculate the square footage of the roof. Multiply the roof’s length and width, then multiply that result by the slope factor.
- Add an additional 10% for waste when purchasing materials.
Step 2: Remove or Place Metal Roof Over Existing Roof
Check your local building codes to determine whether you can install a metal roof over an existing one. Most building codes allow for up to two layers of roofing, so if your roof already has two layers, you’ll need to remove them.
To remove an old roof:
- Use a pry bar to carefully tear off the shingles and underlayment.
- Inspect the roof deck for damage and repair any weak areas before proceeding.
If the roof is in good condition and local codes allow, you can place metal panels directly over the existing roof using underlayment as a barrier between the old and new materials.
Step 3: Fix Any Roof Damage
Before moving on, inspect your roof for any signs of damage. If you notice any sagging, rot, or other issues, fix them before installing the metal panels. It’s essential that the frame and sheathing are in good condition to provide a stable foundation for the new roof.
Step 4: Install Moisture Barrier
To protect your home from moisture and leaks, install a moisture barrier or insulation layer over the roof deck.
- Use roofing felt paper or synthetic underlayment.
- Staple or nail the underlayment in place, ensuring that it covers the entire roof.
Step 5: Install Drip Edge and Closure Strips
A drip edge helps direct water away from the fascia and into the gutters, preventing water damage. Follow these steps:
- Start by securing the drip edges along the eaves and rake of the roof using 1-¼-inch galvanized roofing nails.
- Space the nails about 16 inches apart.
- Overlap multiple runs of drip edges by 1/4 to 1/2 inch, and ensure that the flashing overhangs the gutter lips by about 1/2 an inch.
- Apply sealant tape and closure strips to create a watertight seal along the edges.
Step 6: Install Metal Roofing Panels
Now comes the core of the project—installing the metal roofing panels.
- Start at the eaves and work your way upward.
- Overlap each panel by 1/2 to 3/4 of an inch.
- Follow the manufacturer’s guidelines on screw placement. Place screws along each rib of the panel, being careful not to overtighten them.
- Add silicone sealant on the underside of the short edge of the next panel before installing it to create a watertight seal.
- Use tin snips or a circular saw to cut panels to fit where necessary.
Step 7: Install Ridge Cap
After installing all the panels, you’ll need to secure a ridge cap at the peak of the roof.
- Snap a chalk line along the roof where the ridge cap will be installed to keep everything aligned.
- Install vented closure strips if the roof needs to vent, or use solid strips if not.
- Run sealant tape along the ridge on both sides and press the closure strips down firmly.
- Install the ridge cap by overlapping the panels evenly on both sides and secure it with screws.
When to Call a Professional
While a skilled DIYer can install a metal roof, this is not a project for beginners. Metal roofing panels are heavy and require careful handling, and installation requires precision. A professional roofer will ensure that your roof is installed correctly, meeting all building code requirements. They can also offer a warranty on the work, which provides peace of mind.
The Benefits of Metal Roofing
Metal roofing is one of the best investments you can make for your home or business. Here are just a few reasons why:
- Durability: Metal roofing can last up to 50 years or more with proper maintenance, far exceeding the lifespan of traditional asphalt shingles.
- Energy Efficiency: Metal roofs reflect solar radiation, keeping homes cooler and reducing energy costs.
- Environmental Benefits: Metal roofing is often made from recycled materials and is fully recyclable at the end of its lifespan.
- Low Maintenance: Once installed, metal roofing requires very little maintenance. Occasional cleaning and inspections are enough to keep it in top shape.
- Weather Resistance: Metal roofs can withstand severe weather, including heavy rain, snow, hail, and even strong winds, making them ideal for coastal or high-wind regions.
- Aesthetic Options: Metal roofs are available in a variety of colors, finishes, and styles, allowing homeowners to choose a look that complements their home’s design.
Conclusion
Installing a metal roof is a significant project that requires careful planning, the right tools, and a good understanding of the installation process. While it can be a challenging DIY job, the durability and longevity of metal roofing make it worth the effort. For those who want to ensure a flawless installation, hiring a professional is often the best option.
Whether you choose to tackle this project on your own or hire a pro, The Real Metal Roofing Company is here to provide high-quality materials and expert advice to help you get the job done. Contact us today for a free quote or consultation on your metal roofing project.