Do It Yourself Roll Roofing

Roll roofing offers a fast, economical option for covering low-slope roofs, sheds, and minor structures. This guide explains how to tackle a DIY roll roofing project safely and efficiently, covering materials, tools, step-by-step installation, and maintenance. Readers will learn the best practices for asphalt roll roofing, including handling, weather considerations, flashing, and common mistakes to avoid. By understanding the process, homeowners can decide when roll roofing is suitable and how to complete a durable, long-lasting installation.

What Is Roll Roofing

Roll roofing is a sheet-based roofing material typically made from asphalt-saturated felt or fiberglass with a mineral surface. It arrives in wide rolls that are unrolled and nailed to the roof deck, with seams overlapping to shed water. Roll roofing is designed for low-slope roofs, usually with a pitch of 2:12 or higher, and is a popular choice for sheds, porches, and RV covers due to its low cost and simple installation. While not as durable as asphalt shingles, proper installation can provide reliable protection for several years.

Tools And Materials

Successful roll roofing depends on selecting the right materials and having the proper tools. Essential items include:

• Roll roofing material, typically 36- or 100-foot rolls in varying widths
• Roofing nails with plastic caps or roofing-cap nails
• Nibblers or shears for trimming edges (scissors for small jobs)
• Tin snips or utility knife with a sharp blade
• Chalk line and straightedge for alignment
• Straight edge or ruler for cutting, measuring, and aligning seams
• Roofing cement or seam sealant for edge and seam bonding
• Broom or blower to clean the deck surface
• Roofing underlayment (optional) for added protection on some decks
• Leak barrier or ice-and-water shield at edges and penetrations (optional but recommended)
• Ladder, safety harness, and work gloves for safe handling

Materials vary by project; some roll roofing products include integrated self-adhesive options, while others require roofing cement for adhesion. Be sure to match the selected roll roofing to the local climate and roof slope.

Safety And Prep

Safety should be the first priority. Work on a dry day with minimal wind, and avoid rolling out materials on steep or slippery surfaces. Clear debris from the deck, remove old roofing if necessary, and inspect the deck for damage. Use fall protection when working on elevated structures, especially when a ladder is involved. Have a partner assist with handling rolls and long edges to prevent kinks or tears. Wearing gloves, eye protection, and non-slip footwear reduces common injuries during cutting and nailing.

Step-By-Step Installation Guide

The installation process for DIY roll roofing can be completed in a few practical steps. Each step assumes a standard low-slope roof with a clean deck and appropriate drainage.

1. Prepare the deck: Remove debris, repair any damaged sections, and dry the surface. If the deck is rough, consider a coat of primer or underlayment as needed for even adhesion.
2. Lay out the first row: Unroll the roofing along the eave line and align it with the edge. Mark the cut line to ensure a straight, even starting edge along the roof edge.
3. Install the first course: Beginning at the bottom edge, fasten the material with roofing nails along the nailing strip, ensuring even spacing (typically two to three nails per strip). Do not drive nails too tightly; leave a slight gap to prevent buckling.
4. Continue with subsequent courses: Roll out the next course, aligning with the previous seam. Overlap the top edge by about 2 inches (size may vary by product). Nail along the exposed nailing area, maintaining consistent rows and avoiding over-tightening that could warp the sheet.
5. Seal seams: Apply roofing cement or seam sealant over the edges and along the entire seam to create a watertight bond. Press the seam flat to ensure full contact and sealant coverage.
6. Trim excess material: Use tin snips or a utility knife to trim the final edge to fit. Ensure clean, straight cuts and reseal any exposed edges with sealant.
7. Inspect and test: After installation, inspect all seams and edges. Lightly walk the roof to check for any loose areas, and run water along seams to verify proper drainage and sealing.

Tips for a durable finish include keeping seams aligned, avoiding gaps at the eaves, and ensuring proper overlap for wind resistance. If the roof displays abnormal slope or drainage issues, address them before finishing the installation to prevent future leaks.

Installing Flashing And Edges

Proper flashing around valleys, vents, pipes, and edges is essential to prevent leaks. For roll roofing, place edge flashing along eaves and rakes where appropriate, and seal with roofing cement. For penetrations, extend a strip of roll roofing around the pipe or vent, trim, and seal with sealant. Use self-adhesive membranes or additional underlayment at critical points to improve water management. When in doubt, consult product manufacturer guidelines for flashing compatibility with the chosen roll roofing product.

Maintenance And Aftercare

Roll roofing requires regular inspection and simple maintenance to maximize its lifespan. Check for loose nails, torn edges, or lifted seams after storms or high winds. Keep the roof clear of debris to avoid water pooling and gutter clogging. Re-seal seams and corners every few years or as needed, especially in areas with harsh weather. If leaks develop, act quickly to reseal or replace affected sections before further damage occurs. A well-maintained roll roof can provide reliable protection for 5 to 10 years depending on climate and installation quality.

Pros, Cons, And Cost

Roll roofing offers several advantages and drawbacks. Its primary benefits include low material cost, quick installation, and simplicity for smaller or low-slope structures. However, roll roofing generally has a shorter lifespan than asphalt shingles or metal roofs and may be more prone to wind damage if not properly installed. Cost-wise, roll roofing is among the most budget-friendly options, typically ranging from a few hundred dollars for small sheds to about a thousand dollars or more for larger projects, depending on materials and labor timeframe. DIY installation can save significantly on labor costs but requires careful preparation and safety measures.

When To DIY Or Hire A Pro

DIY roll roofing is well-suited for simple, low-slope projects like sheds, awnings, or carports where aesthetics are less critical and budget is a primary concern. For larger roofs, roofs with complex geometry, or areas with severe weather, hiring a professional can mitigate risks and ensure a durable installation. Contractors can provide warranties on workmanship and help with proper flashing, underlayment, and ventilation considerations. If uncertainty exists about roof pitch, substrate condition, or material selection, seeking professional guidance remains a prudent choice.