Learn how to install roll roofing with this step-by-step guide. Discover the tools, preparation, installation process, and expert tips
INTRODUCTION
Roll roofing is a practical and cost-effective roofing material often used on sheds, garages, workshops, and other low-slope structures. Unlike traditional asphalt shingles, roll roofing comes in large sheets that cover more surface area in less time, making installation faster and easier. While the process is relatively straightforward, proper installation is essential to ensure the roof remains weather-resistant and long-lasting. This guide explains how to install roll roofing correctly, from preparing the roof surface to completing the final inspection.
WHAT IS ROLL ROOFING?
Roll roofing is a mineral-surfaced roofing material made from asphalt-based products similar to those used in conventional shingles. It is sold in large rolls, making it easier to install on smaller structures and low-slope roofs. Because of its affordability and ease of installation, roll roofing is commonly chosen for outbuildings where functionality is more important than appearance. When installed properly, it can provide reliable protection against rain, wind, and sunlight for several years.
BENEFITS OF INSTALLING ROLL ROOFING
Before beginning the installation process, it is important to understand why many property owners choose roll roofing.
Some of the key advantages include:
- Lower material costs compared to many roofing systems
- Faster installation process
- Suitable for low-slope roofs
- Minimal maintenance requirements
- Easy replacement and repair
- Lightweight construction
These benefits make roll roofing a practical option for homeowners looking for an economical roofing solution.
TOOLS AND MATERIALS YOU WILL NEED
Having the right tools and materials ready before starting the project can save time and improve installation quality.
Materials
- Roll roofing
- Roofing cement
- Roofing nails
- Roofing felt or underlayment
- Drip edge flashing
Tools
- Hammer
- Utility knife
- Tape measure
- Chalk line
- Ladder
- Work gloves
- Safety glasses
Preparing everything in advance helps keep the installation process organized and efficient.
PREPARING THE ROOF SURFACE
A successful roofing project starts with proper preparation. Installing new roofing material over a damaged or uneven surface can lead to leaks and premature wear. Begin by removing old roofing materials, loose nails, and debris. Once the surface is clear, inspect the roof deck for signs of rot, water damage, or structural issues. Any damaged sections should be repaired or replaced before installation begins. A clean, dry, and solid roof deck provides the best foundation for roll roofing.
INSTALLING UNDERLAYMENT AND DRIP EDGE
Many roofing professionals recommend installing roofing felt or underlayment before laying roll roofing. This additional layer provides extra protection against moisture and helps improve the overall durability of the roof. After the underlayment is secured, install drip edge flashing along the roof edges. Drip edge flashing helps direct water away from the roof structure and reduces the risk of moisture damage along the edges. Although these steps may seem minor, they contribute significantly to the roof’s long-term performance.
MEASURING AND CUTTING THE ROLL ROOFING
Accurate measurements are important for reducing waste and ensuring proper coverage. Measure the roof length carefully and cut the roofing material to the required size using a sharp utility knife. It is often easier to cut all necessary sections before climbing onto the roof. Allow the material to lie flat for a short period after cutting. This helps reduce curling and makes positioning easier during installation.
INSTALLING THE STARTER STRIP
The starter strip provides additional protection along the roof edge where water runoff is greatest. Cut a strip of roofing material approximately half the width of the full roll. Position it along the eaves with the appropriate side facing downward according to the manufacturer’s instructions. Secure the strip with roofing nails and apply roofing cement beneath it for added water resistance. A properly installed starter strip helps strengthen the first course of roofing.
LAYING THE FIRST COURSE OF ROLL ROOFING
The first course serves as the foundation for the remaining roofing material, so alignment is extremely important. Place the first full-width sheet along the lower edge of the roof. Allow a slight overhang beyond the roof edge to encourage proper drainage. Before fastening the material, check that it is straight and properly aligned. Once satisfied with the position, secure it using roofing nails placed according to the manufacturer’s recommendations. Taking extra time with the first course can prevent alignment issues later in the installation process.
SECURING THE ROOFING MATERIAL
Proper fastening is essential for keeping the roofing material in place during strong winds and changing weather conditions. Drive roofing nails evenly along the edges and designated fastening areas. Nails should sit flush against the roofing surface without cutting into the material. Avoid placing nails too close to the edge, as this may increase the risk of tearing over time. Correct nail placement helps maintain the roof’s structural integrity.
SEALING OVERLAPS AND SEAMS
One of the most important parts of roll roofing installation is creating watertight seams. Apply roofing cement beneath each overlap before positioning the next course. Press the overlapping section firmly into the cement to create a secure seal. If multiple pieces are required to cover the roof length, overlap adjoining sections and seal them carefully with roofing cement. Most roof leaks occur around poorly sealed seams, making this step particularly important.
INSTALLING ADDITIONAL COURSES
Continue installing additional courses toward the ridge of the roof. Each new row should overlap the previous one according to the manufacturer’s specifications. Maintaining consistent overlaps helps direct water away from vulnerable areas and improves weather protection. Use a chalk line when necessary to keep the courses straight and evenly aligned. Working methodically from the bottom upward helps create a neat and professional-looking finish.
FINISHING THE RIDGE
Once the roofing reaches the highest point of the roof, the ridge area must be protected. A ridge cap can be generated using surplus roll roofing material. Position the cap evenly over both sides of the ridge and secure it with roofing nails. Apply roofing cement beneath the ridge cap and over exposed nail heads to improve water resistance and durability. Because the ridge is exposed to wind and rain from multiple directions, careful installation is essential.
INSPECTING THE COMPLETED ROOF
After installation is complete, inspect the entire roof carefully.
Look for:
- Loose or missing nails
- Wrinkled sections
- Improper overlaps
- Unsealed seams
- Exposed fasteners
Addressing small issues immediately can help prevent larger roofing problems in the future.
A final inspection ensures the roof is ready to provide reliable protection against the elements.
MAINTAINING ROLL ROOFING FOR LONG-TERM PERFORMANCE
Regular maintenance can extend the lifespan of roll roofing and reduce repair costs. Inspect the roof periodically, especially after severe weather. Remove leaves, branches, and debris that may trap moisture. Check seams and overlaps for signs of wear and apply additional roofing cement if needed. Prompt attention to minor damage can prevent leaks and prolong the life of the roofing system.
CONCLUSION
Installing roll roofing is a practical project that can be completed successfully with careful planning and attention to detail. From preparing the roof surface to sealing seams and finishing the ridge, each step plays an important role in creating a durable and weather-resistant roof. By following proper installation techniques and performing routine maintenance, homeowners can enjoy reliable protection and excellent value from their roll roofing investment for years to come.
