If you’re looking to start your career in the roofing industry, understanding how to lay roll roofing is a fundamental skill. Roll roofing is a popular choice for its affordability, ease of installation, and suitability for low-slope roofs. This guide will walk you through the step-by-step process of how to lay roll roofing, ensuring you’re well-prepared to take on your first roofing project. Let’s get started.
What is Roll Roofing?
Roll roofing, also known as rolled roofing, is a mineral-surfaced roofing product available in rolls of 36 feet by 36 inches. It’s commonly used for low-slope residential roofs, sheds, garages, and outbuildings. The material is made from the same durable materials as asphalt shingles, providing a cost-effective solution with a lifespan of around 5-10 years.
How to Lay Roll Roofing
Laying roll roofing is a crucial skill for anyone starting a career in the roofing industry. This step-by-step guide provides detailed instructions to ensure a successful installation.
1. Prepare the Roof Surface
Before you begin laying roll roofing, it’s essential to prepare the roof surface thoroughly. Start by cleaning the roof deck, ensuring it is free of debris, dirt, and any old roofing materials. A clean surface will help the new roofing adhere better and last longer. Inspect the roof deck for any damaged or rotten sections; these should be repaired or replaced to provide a solid foundation for the roll roofing. Applying a roofing primer is recommended by some manufacturers to enhance adhesion, especially if the surface is porous or weathered.
2. Measure and Cut the Roll Roofing
Accurate measurements are vital for a smooth installation process. Measure the length and width of your roof to determine the number of roll roofing sections you’ll need. Typically, cutting the roll roofing into 12-foot sections makes it easier to handle. Use a utility knife to make precise cuts. Having all your sections pre-cut before you start nailing them down will streamline the process and reduce interruptions.
3. Install the First Layer
Begin laying the first layer of roll roofing at the bottom edge of the roof. Unroll the material horizontally, aligning it with the roof’s edge. It’s important to leave a 1/4 to 3/8 inch overhang to facilitate water runoff and prevent leaks. Secure the roll with roofing nails, placing them about 10 inches apart along the edges and 12 inches apart along the centerline. This spacing ensures that the roll roofing is firmly attached and can withstand wind and weather.
4. Apply Roofing Cement
Once the first layer is secured, apply a layer of roofing cement to the top edge. This step is crucial as it helps seal the seams and prevents water from penetrating the roof. Roofing cement acts as an adhesive and sealant, providing an extra layer of protection against the elements. Make sure the cement is evenly applied and covers the entire seam for optimal performance.
5. Install Additional Layers
To install additional layers, start by overlapping the next section of roll roofing by at least 4 inches over the previous one. This overlap is essential to ensure proper water shedding and prevent leaks. Nail the roll in place, following the same nailing pattern used for the first layer. After nailing, apply roofing cement at the seams to seal them. Continue this process, working your way up the roof until you reach the top. Each layer should be securely fastened and sealed to provide a continuous, watertight surface.
6. Finish the Roof Edges
Finishing the edges of the roof is a critical step for both aesthetics and functionality. Trim any excess roll roofing material at the edges using a utility knife for a clean, professional look. After trimming, apply roofing cement along the edges to seal them. This step helps prevent wind uplift and ensures that the edges are firmly adhered to the roof deck, enhancing the overall durability of the roof.
7. Inspect Your Work
After all layers are installed and edges are sealed, it’s important to inspect your work thoroughly. Check all seams to ensure they are properly sealed with roofing cement and there are no exposed nails. Exposed nails can lead to leaks and should be covered with a dab of roofing cement. Look for any gaps or areas that might allow water to penetrate and fix them promptly. A thorough inspection ensures that the roof is watertight and ready to withstand the elements.
Tips for Success
- Safety: Always wear appropriate safety gear, including gloves, goggles, and a harness, especially when working on high roofs.
- Weather: Avoid installing roll roofing in wet or extremely cold weather as the material can become brittle and difficult to handle.
- Storage: Store roll roofing materials in a dry, cool place to prevent them from getting damaged before installation.
Read More: How To Clean Metal Roof
Conclusion
Learning how to lay roll roofing is a valuable skill for anyone starting their career in the roofing industry. By following this step-by-step guide, you’ll be able to confidently install roll roofing, providing a durable and weather-resistant solution for low-slope roofs. Remember, practice and attention to detail are key to mastering this essential roofing technique.
