DIY Roll Roofing: A Practical Guide to Install Asphalt Roll Roofing
Roll roofing offers an economical, quick solution for sheds, porches, and small roofs. This guide explains how to plan, prepare, and install asphalt roll roofing with practical tips, safety steps, and common troubleshooting. It emphasizes the steps, materials, and techniques involved in successful DIY roll roofing projects, helping homeowners achieve a durable, weather-tight result.
Materials And Tools
Begin with a complete list to prevent mid-project delays. For asphalt roll roofing, common materials include mineral-s surfaced rolls, roofing nails, cap nails, roofing cement or sealant, a roofing hammer or nail gun, a utility knife, a chalk line, a straightedge, a tape measure, a pry bar, and a brush or broom for cleaning. Optional items include roofing felt for an extra moisture barrier and sleeve vents if the roof requires ventilation. Ensure all materials meet local code and wind load requirements for your area.
Safety Considerations
Work safely when handling rolls and ladders. Use sturdy ladders with a helper to move heavy rolls. Wear gloves to protect hands and safety glasses to guard eyes from dust and nails. Keep the work area clear of debris and avoid working on wet or windy days. For elevated roofs, use fall protection such as a harness or guardrails. Follow local building codes and wear appropriate PPE at all times.
Preparing The Roof Surface
Successful roll roofing starts with a clean, dry substrate. Remove debris, old shingles, and protrusions that could create pinch points. If the roof deck shows signs of damage, repair or replace affected sections before covering. Ensure the deck is smooth, dry, and free of oil or tar. In mulitlayer applications, install a primer or prep coat as recommended by the manufacturer to improve adhesion and longevity.
Roll Roofing Basics And Layout
Asphalt roll roofing typically comes in 3-foot-wide rolls. Determine the right direction for installation, usually running from the bottom edge to the top to control water flow. Mark clean, straight lines with a chalk line for alignment. Dry-fit the first course to ensure proper overlap, usually 2-4 inches side-to-side and 6 inches at the end laps, as specified by the product instructions. Plan for edge closures and flashing at vents, chimneys, or skylights.
Step-By-Step Installation
- Measure and cut rolls to fit the roof area, allowing for overlap and waste.
- Lay down the first course along the eave, aligning with the chalk line. Nail along the top edge in a zigzag pattern to reduce wind uplift.
- Roll the sheet taut, smoothing ridges and bubbles with a roofing roller or hands. Apply roofing cement under end laps or use cap nails to secure the edges.
- Proceed in horizontal strips, overlapping each new course according to the manufacturer’s guidance. Maintain consistent nail spacing and avoid over-tightening nails to prevent warping.
- Seal end laps with roofing cement or a compatible sealant. Inspect seams, then press firmly to ensure proper adhesion.
- Install edge caps and flashing around penetrations or transitions to create a water-tight seal. Clean up any excess sealant after it cures.
Sealing And Edge Details
Edge protection is essential to prevent wind-driven uplift. Use edge caps along the eaves and rakes, and apply tape or sealant along the underlayment where required. At vents, chimneys, or skylights, use metal flashing with a flexible sealant to maintain a weather-tight seam. Ensure all laps are clean and well-adhered to prevent moisture intrusion.
Common Mistakes And How To Avoid Them
- Skipping surface prep. Clean and dry the deck to improve adhesion and longevity.
- Incorrect overlap. Follow product specs for side and end laps to prevent water ingress.
- Nail placement errors. Space nails evenly and avoid overdriving, which can damage the roll.
- Working on a windy day. Wind can lift edges; schedule installation in calm conditions or secure rolls properly.
- Neglecting flashing. Improper flashing around penetrations invites leaks; install properly with compatible sealants.
Maintenance And Longevity
Roll roofing is a cost-effective option, but it requires periodic inspection. Check seams and edges after heavy rain or wind for signs of lifting or cracking. Clean debris and re-seal small gaps as needed. Over time, UV exposure and temperature fluctuations can cause the material to become brittle or lose flexibility. If leaks persist or the surface shows significant wear, consider replacing affected sections or upgrading to a more durable roofing system.
Cost Considerations
DIY roll roofing generally costs less than shingle or metal roofs due to lower material and labor expenses. Material costs vary by thickness, mineral-surfacing, and brand. The total project cost includes nails, sealants, and tools if not already on hand. Labor savings come with proper planning and careful execution; poor installation can lead to early leaks or accelerated wear, increasing long-term costs.
Environmental And Practical Benefits
Roll roofing uses fewer resources per square foot and is simple to install, reducing waste and labor time. It is suitable for small structures, sheds, or additions where a lightweight, low-profile roof is desirable. Consider environmental factors such as insulation needs, roof pitch, and potential recycling options for the material at end of life when evaluating this option.
When To Seek Professional Help
If the roof deck is exceptionally damaged, the project involves complex flashing or multiple penetrations, or local codes require specialized installation, consulting a licensed contractor is prudent. Professional help ensures compliance with building codes, especially for wind and snow load requirements, and can provide a longer-lasting result for larger or more complex projects.