Replacing your roof is a big job, but it’s one of the most important things you can do to protect your home. If your roof is old or damaged, it can start to leak, which can lead to serious problems inside your home. Water damage can cause mold, mildew, and rot, which can all compromise the structural integrity of your home. It can also be very expensive to repair. That’s why it’s important to replace your roof before it starts to cause problems.
There are many different types of roofing materials available, but tin is a popular choice for many homeowners. Tin roofs are durable, lightweight, and relatively easy to install. They are also fire-resistant and can help to reduce your energy bills. If you’re thinking about replacing your roof, tin is a great option to consider. However, it’s important to note that tin roofs can be noisy in heavy rain or hail. If you live in an area with a lot of precipitation, you may want to consider a different type of roofing material.
If you’re interested in installing a tin roof over your shingles, there are a few things you need to do to prepare. First, you need to make sure that your roof is in good condition. If there are any damaged or missing shingles, you need to repair them before you install the tin roof. You also need to make sure that your roof is properly ventilated. If it’s not, the moisture can get trapped under the tin roof and cause it to rust.
Assessing the Condition of the Shingles
Before laying a tin roof over shingles, it is crucial to thoroughly assess the condition of the underlying shingles. This inspection will help determine the feasibility of the overlay and identify any potential issues that need to be addressed:
Shingle Age and Condition
Examine the shingles for signs of aging, deterioration, or damage. Older shingles may be brittle, cracked, or missing granules, indicating a weakened condition. Loose or broken shingles should be replaced or repaired before installing the tin roof to ensure a stable and secure base.
Structural Integrity
Check the structural integrity of the roof deck by walking on it and observing for any sagging, creaking, or excessive movement. Ensure that the decking is strong enough to support the additional weight of the tin roof and that there are no underlying structural issues that could compromise the roof’s stability.
Moisture Damage
Inspect the shingles for signs of moisture damage, such as mold, mildew, or water stains. Moisture can weaken shingles and cause them to deteriorate, creating an unstable base for the tin roof. If moisture damage is present, it should be addressed and repaired before proceeding with the installation.
Preparing the Roof for the Tin Panels
Before installing tin panels over shingles, it is crucial to thoroughly prepare the roof. This involves several key steps to ensure a secure and long-lasting installation.
Inspect the Roof
Thoroughly inspect the roof for any damage, such as missing or loose shingles, broken flashing, or rotted wood. Repair or replace any damaged areas to create a solid base for the tin panels.
Remove Obstructions
Remove any obstructions from the roof, such as antennas, satellite dishes, or vents. These obstructions may interfere with the installation of the tin panels and need to be temporarily removed or relocated.
Clean the Roof
Clean the roof thoroughly to remove any dirt, debris, or algae. This ensures that the tin panels adhere properly to the shingles. Use a pressure washer or a stiff brush and water to clean the surface.
Install Underlayment
Install an underlayment, such as roofing felt or synthetic underlayment, over the cleaned shingles. This layer provides additional waterproofing and prevents moisture from seeping through the roof.
Mark Panel Placement
Measure and mark the placement of the tin panels on the roof. Use chalk lines to create reference lines for aligning the panels and ensuring proper overlap.
Secure the Panels
Secure the tin panels to the shingles using specialized roofing nails or screws. Start at the bottom edge of the roof and work your way up, overlapping each panel according to the manufacturer’s instructions.
Seal the Seams
Apply a waterproof sealant along the seams where the tin panels overlap. This helps prevent moisture from entering the roof and ensures a long-lasting installation.
| Type | Length | Head Diameter |
|---|---|---|
| Galvanized roofing nails | 1 1/4″ to 2″ | 3/8″ to 1/2″ |
| Stainless steel roofing nails | 1 1/4″ to 2 1/2″ | 3/8″ to 1/2″ |
Choosing the Right Tin Panels and Accessories
Materials and Finishes
Tin panels come in a variety of materials, including steel, aluminum, and zinc. Steel is the most common and affordable option, but it is also more prone to rust. Aluminum is more expensive than steel, but it is lighter, stronger, and more corrosion-resistant. Zinc is the most expensive option, but it is also the most durable and rust-resistant.
The finish of the tin panels is also important to consider. Tin panels can be painted, coated, or left unfinished. Painted panels are less expensive than coated panels, but the paint can chip and peel over time. Coated panels are more expensive than painted panels, but they provide better protection against corrosion and fading. Unfinished panels are the most affordable option, but they will rust over time.
Panel Types
Tin panels come in a variety of types, including:
- Corrugated panels: Corrugated panels are the most common type of tin roofing. They are made of corrugated metal sheets that are attached to the roof decking with nails or screws. Corrugated panels are strong and durable, and they can withstand high winds and hail.
- Standing seam panels: Standing seam panels are a type of tin roofing that is installed without nails or screws. Instead, the panels are attached to the roof decking with a standing seam, which is a raised ridge that is crimped together. Standing seam panels are more expensive than corrugated panels, but they are also more durable and weather-resistant.
- Tile panels: Tile panels are a type of tin roofing that is made to resemble clay or concrete tiles. Tile panels are lightweight and easy to install, and they can create a beautiful and unique look for your home.
Gauge and Thickness
The gauge and thickness of the tin panels are also important considerations. Gauge refers to the thickness of the metal, with a higher gauge indicating a thinner metal. Thickness is measured in mils, and a higher thickness indicates a stronger metal.
The gauge and thickness of the tin panels will determine their durability and strength. Thicker panels are more durable and stronger than thinner panels, but they are also more expensive.
Installing the Drip Edge and Valley Flashing
Drip Edge
The drip edge is a metal flashing that is installed along the eaves and rakes of the roof. It helps to prevent water from seeping under the shingles and damaging the roof deck. To install the drip edge, simply nail it to the fascia board with roofing nails. Make sure that the drip edge extends at least 2 inches over the edge of the roof.
Valley Flashing
Valley flashing is a metal flashing that is installed in the valleys of the roof. It helps to prevent water from leaking into the attic. To install valley flashing, follow these steps:
1. Cut the valley flashing to length
Measure the length of the valley and cut the valley flashing to that length. Make sure that the flashing extends at least 6 inches beyond the edge of the roof on each side.
2. Install the valley flashing
Start at the bottom of the valley and work your way up. Nail the valley flashing to the roof deck with roofing nails. Make sure that the flashing overlaps the shingles by at least 4 inches.
3. Seal the seams
Once the valley flashing is installed, seal the seams with roofing cement. This will help to prevent water from leaking into the attic.
| Step | Description |
|—|—|
| 1 | Measure the length of the valley and cut the valley flashing to that length. |
| 2 | Start at the bottom of the valley and work your way up. Nail the valley flashing to the roof deck with roofing nails. |
| 3 | Once the valley flashing is installed, seal the seams with roofing cement. |
How To Put A Tin Roof Over Shingles
Laying the First Row of Tin Panels
Laying the first row of tin panels is the most critical step in installing a tin roof over shingles. It sets the foundation for the rest of the roof and ensures that the panels are properly aligned and sealed. Here are the detailed steps to follow:
-
Determine the Starting Point:
Identify the lowest point on the roof where water will flow. Mark this point as the starting point for laying the first row of tin panels. -
Install Starter Strip:
Attach a starter strip along the eaves of the roof. This strip provides a base for the first row of tin panels and helps prevent water from leaking underneath them. -
Align First Panel:
Place the first tin panel on the starter strip with the bottom edge flush with the eaves. Ensure that the panel is aligned straight and parallel to the edge of the roof. -
Nail the Panel:
Drive galvanized roofing nails through the pre-punched holes in the panel and into the starter strip. Use a nail spacing of 4-6 inches to secure the panel. -
Interlock and Seal Seams:
Interlock the side edge of the first panel with the adjacent panel and seal the seam with roofing sealant. This step prevents water from penetrating the joints between the panels. -
Continue Installing:
Repeat steps 3-5 to install the remaining tin panels in the first row, ensuring that they are properly aligned, nailed, and sealed.
Remember to use appropriate safety precautions, such as wearing gloves and eye protection, when handling tin panels and roofing materials.
Overlapping and Securing the Tin Panels
① Measure and Align the First Panel
Determine the run of the roof by measuring from the eave to the peak. Mark the starting point for the first panel on the lower edge of the roof, ensuring it aligns horizontally with the eave and vertically with the rake.
② Install the Starter Panel
Lay the first panel on the marked starting point. Secure it temporarily using roofing nails every 6 inches along the eave. Leave a 1-inch overhang at the gable end.
③ Overlap Successive Panels
Position the subsequent panel so that it overlaps the starter panel by half its width. Secure it with roofing nails every 6 inches along the lateral seam and 12 inches along the top and bottom edges.
④ Crimp the Joints
Use a roofing seamer to crimp the lateral seams between the panels. This creates a weathertight bond that prevents water from penetrating.
⑤ Secure the Gables
Trim the edge of the last panel to fit the gable end. Overlap the gable with a step flashing and seal it with roofing cement.
⑥ Seal the Ridges
Install a ridge cap over the ridge of the roof. Secure it with roofing screws every 6 inches and seal the joints with roofing cement. Alternatively, you can create a “standing seam” by bending the edges of the panels together and crimping them using a roofing seamer.
| Material | Purpose |
|---|---|
| Roofing Nails | Secure panels to roof deck |
| Roofing Screwdriver | Fasten screws into the roof deck |
| Roofing Seamers | Crimp and seal panel seams |
| Roofing Cement | Seal joints and prevent leaks |
Installing Ridges, Hips, and Gables
Ridges
Installing ridges involves laying metal ridge cap over the shingles at the peak of the roof. Mark the center of the cap with chalk lines that extend from the eaves to the ridge. Place the ridge cap on the marks, starting at one end and working towards the other. Secure the cap using ridge cap nails or screws.
Hips
Hips are similar to ridges, but they are installed at the intersections of two roof planes. Mark the center of the hip cap as described for ridges. Place the cap on the marks and secure it using hip and ridge nails or screws.
Gables
Gables are triangular roof sections that are enclosed by siding or other materials. To install a tin roof over shingles on a gable, first remove the existing siding or fascia boards. Cut the metal roof panels to size and install them over the shingles, starting at the bottom and working upwards. Secure the panels using roofing nails or screws.
Finishing Touches
Once the tin roof is installed over the shingles, you can add finishing touches such as flashing, gutters, and downspouts to complete the project. Flashing is installed around chimneys, vents, and other roof penetrations to prevent water from leaking into the building. Gutters and downspouts collect and divert rainwater away from the roof and foundation.
Materials and Tools
To install a tin roof over shingles, you will need the following materials and tools:
| Materials | Tools |
|---|---|
| Tin roof panels | Hammer or nail gun |
| Ridge cap | Caulk gun |
| Hip cap | Chalk line |
| Roofing nails or screws | Measuring tape |
| Flashing | Tin snips |
| Gutters and downspouts | Safety glasses |
Sealing Seams and Joints
Proper sealing between panels is crucial for a leak-proof roof. Use the following steps to ensure optimal sealing:
1. Prepare the Seams
Clean the overlapping edges of the panels using a solvent or wire brush to remove any dirt or debris.
2. Apply Sealant
Apply a generous bead of high-quality roofing sealant along the length of the overlapping seam.
3. Seal the Edges
Press the panels together firmly to ensure the sealant spreads evenly throughout the seam.
4. Use Butyl Tape
For added protection, place self-adhesive butyl tape over the sealed seam to create an extra layer of waterproofing.
5. Use Shims
If necessary, use shims to level the panels and ensure a tight fit before sealing.
6. Overlap Panels
When overlapping panels, allow for at least 4 inches of overlap to provide sufficient coverage.
7. Stagger the Joints
Stagger the vertical joints between panels by at least 24 inches to prevent water penetration through multiple seams.
8. Flashing and Edges
Install flashing around chimneys, dormers, and other roof penetrations to prevent water infiltration. Use sealant and fasteners to secure the flashing.
The following table provides recommended sealant materials for different roofing applications:
| Application | Recommended Sealant |
|---|---|
| General Roofing | Silicone-based sealant |
| High-Temperature Areas | Butyl-based sealant |
| Low-Temperature Areas | Polyurethane-based sealant |
Flashing Around Skylights and Vents
When installing a tin roof over shingles, it’s essential to properly seal around skylights and vents to prevent leaks. To do so, follow these steps:
1. Clean the Surface
Clean the area around the skylight or vent to remove any debris or dirt.
2. Install Underlayment
Apply peel-and-stick underlayment around the skylight or vent opening.
3. Bend Flashing
Bend flashing material at a 90-degree angle, creating an “L” shape.
4. Insert Flashing
Slide the “L” shaped flashing under the shingles and over the underlayment.
5. Secure Flashing
Fasten the flashing to the roof deck using roofing nails or screws.
6. Install Step Flashing
For skylights, install step flashing along the sides of the opening to prevent water from running down the sides.
7. Seal Joints
Apply sealant along all joints and seams to ensure a watertight seal.
8. Cover with Roof Panels
Lay tin roof panels over the flashing, ensuring they overlap properly.
9. Install Trim
Install trim around the perimeter of the skylight or vent opening to cover any exposed flashing and provide a finished look.
Specific instructions for flashing around different types of skylights or vents may vary, so it’s important to consult the manufacturer’s guidelines.
| Flashing Type | Application |
|---|---|
| Apron Flashing | Flat skylights |
| Curb-Mounted Flashing | Curb-mounted skylights |
| Step Flashing | Sloped skylights |
Maintaining the Tin Roof
After the tin roof installation is complete, maintenance is crucial to ensure its longevity and performance. Here’s a comprehensive guide to keeping your tin roof in pristine condition:
Inspection and Cleaning
Regular inspections are essential to detect any issues early on. Inspect the roof for signs of rust, corrosion, or damage to the panels or fasteners. Clean the roof annually to remove debris, dirt, and moss that can trap moisture and lead to premature degradation.
Rust Prevention
Tin roofs are prone to rust if not properly maintained. Apply a protective coating regularly, as it acts as a barrier against the elements and prevents the formation of rust. Touch up any scratches or punctures immediately to prevent further corrosion.
Ventilation
Proper ventilation is crucial to prevent moisture buildup under the roof. Install ridge vents along the peak of the roof and soffit vents along the eaves to ensure adequate airflow. This will help prevent condensation and extend the lifespan of the roof.
Repairs
Any damage to the tin panels or fasteners should be repaired promptly to prevent further issues. Replace any damaged panels, and secure loose or missing fasteners. If the damage is extensive, consult a professional roofing contractor.
Moss Control
Moss growth can trap moisture and damage the roof. Apply a moss-killing solution to the roof regularly, especially in shaded areas. Alternatively, consider installing moss guards along the edges of the roof to prevent moss buildup.
Warranty Maintenance
Most tin roofs come with warranties ranging from 20 to 50 years. To maintain the warranty, adhere to the manufacturer’s maintenance guidelines and perform regular inspections and cleanings. Keep records of all maintenance performed.
Paint Touch-Ups
Over time, the paint on the tin roof may fade or chip. For aesthetic purposes, touch up the paint as needed, especially if it has become discolored or damaged.
Professional Inspections
In addition to regular inspections, consider having a professional roofing contractor inspect the roof every few years. They can assess the overall condition of the roof, identify any potential issues, and recommend preventive measures.
Additional Maintenance Tips
Here are some additional tips for maintaining a tin roof:
| Maintenance Task | Frequency | Additional Notes |
|---|---|---|
| Inspection | Annually | Check for rust, corrosion, damage |
| Cleaning | Annually | Remove debris, dirt, moss |
| Rust Prevention | Every 3-5 years | Apply protective coating |
| Ventilation | Ensure proper airflow | Install ridge vents, soffit vents |
| Repairs | As needed | Fix damaged panels, fasteners |
| Moss Control | Annually in shaded areas | Apply moss-killing solution or install moss guards |
| Warranty Maintenance | Follow manufacturer’s guidelines | Keep maintenance records |
| Paint Touch-Ups | As needed | Restore aesthetic appearance |
| Professional Inspections | Every 3-5 years | Assess overall roof condition |
How To Put A Tin Roof Over Shingles
Putting a tin roof over shingles is a great way to improve the look of your home, increase its energy efficiency, and protect it from the elements. While it may seem like a daunting task, it is actually quite simple to do if you have the right tools and materials. Here are the steps on how to put a tin roof over shingles:
1. Remove any loose or damaged shingles.
2. Install a layer of roofing felt over the shingles.
3. Install battens over the roofing felt.
4. Install the tin roof panels.
5. Seal the seams of the tin roof panels.
Once you have completed these steps, your new tin roof will be installed and ready to protect your home for years to come.
People Also Ask About How To Put A Tin Roof Over Shingles
Can I put a tin roof over shingles without removing them?
No, you cannot put a tin roof over shingles without removing them. The shingles must be removed so that the roofing felt and battens can be installed. These materials are necessary to ensure that the tin roof is properly installed and will last for many years to come.
How much does it cost to put a tin roof over shingles?
The cost of putting a tin roof over shingles will vary depending on the size of your home, the type of tin roof you choose, and the labor costs in your area. However, you can expect to pay between $5,000 and $15,000 for a tin roof installed over shingles.
How long does it take to put a tin roof over shingles?
The time it takes to put a tin roof over shingles will vary depending on the size of your home and the number of people working on the project. However, you can expect the project to take between 2 and 5 days to complete.
