Asphalt rolled roofing material is a budget-friendly, easy-to-install option for covering low-slope roofs on sheds, porches, and some residential structures. Known for its affordability, quick application, and straightforward maintenance, it serves as a practical solution where a temporary or intermediate roofing layer is needed. This guide covers composition, installation considerations, advantages and drawbacks, common applications, and best practices to help homeowners and contractors decide if asphalt rolled roofing is the right choice.
Overview Of Asphalt Rolled Roofing Material
Asphalt rolled roofing is a low-profile, self-sealing membrane made from a sticky asphalt compound laminated to a substrate, often fiberglass or organic felt. It is sold in wide rolls, typically 3 feet by 12 to 36 feet, offering rapid coverage for flat or gently sloped roofs with minimal labor. The material is available in different thicknesses and surface textures, including smooth and mineral-s surfaced options. Its primary function is to provide a waterproof barrier while remaining cost-effective compared with metal or shingle systems.
Composition And Types
The core of asphalt rolled roofing consists of asphalt adhesive bonded to a reinforcing base. Mineral granules or a mineral-surfaced top layer can be added to improve UV resistance and durability. The common types include:
- Mineral-Surfaced Roll Roofing with mineral granules on the surface for enhanced durability and reflective capability.
- Non-Surfaced Roll Roofing offering a smoother finish, typically applied with simple sealants.
- Fiberglass-Backed Roll Roofing providing increased tear resistance and weather tolerance compared with organic felts.
- Organic Felt Roll Roofing made from natural fibers, offering a cost-effective option but with lower moisture resistance than fiberglass-backed products.
Asphalt roll roofing is designed for low-slope applications where the roof pitch is generally 2:12 or less. It is not intended for high-wind exposure or prolonged heavy rainfall without proper detailing and maintenance.
Pros And Cons
Understanding the advantages and limitations helps determine suitability for a given project:
- Pros include low cost, rapid installation, easy repairs, and simple tear-off when replacement is needed.
- Cons involve shorter lifespan (often 5–15 years depending on climate and maintenance), limited wind resistance at higher slopes, and reduced durability under standing water or heavy hail compared with more robust roofing options.
- Best-use scenarios are low-slope roofs on sheds, porches, additions, and temporary coverings where a budget-conscious, short- to medium-term solution is acceptable.
Applications And Best Use Scenarios
Asphalt rolled roofing excels in specific contexts. For sheds, garden houses, and carports, it provides a straightforward upgrade from old tar or basic membranes. For residential homes, it is most appropriate as a temporary or transitional roof, or on structures with low slope and limited exposure to wind. It can also serve as a secondary roof under a more durable primary cover, offering a waterproof layer while allowing other roofing layers to be installed later.
Installation Considerations
Proper installation is crucial for performance. Key steps include:
- Surface Preparation—ensure the deck or substrate is clean, dry, and smooth. Repair any protrusions or damage that could telegraph through the roll.
- Underlayment—in some regions, a compatible underlayment or primer is recommended to improve adhesion and moisture resistance.
- Roll Layout—start at the eave, unroll parallel to the slope, and align seams carefully to minimize gaps.
- Adhesive And Fastening—use the recommended asphalt adhesive or mechanical fasteners per manufacturer guidelines. Seams are typically sealed with companion sealants or self-sealing tabs, depending on product.
- Ventilation And Drainage—ensure proper drainage to prevent ponding, which can accelerate deterioration of the material.
Weather conditions during installation matter. Avoid installing in extreme heat or wet conditions, which can affect adhesive performance and seam integrity.
Maintenance And Longevity
Maintenance extends the life of asphalt rolled roofing. Regular inspections should look for blisters, cracks, lifted edges, or ponding water. Address problems promptly to prevent water intrusion. Cleaning debris from around parapets and ensuring proper flashings reduces risk of leaks. Re-sealing exposed seams and corners may be necessary every few years, depending on climate and wear. In areas with heavy sun exposure, consider reflective coatings or mineral-surfaced rolls to improve UV resistance and reduce heat buildup.
Environmental And Cost Considerations
Cost is a primary consideration. Asphalt rolled roofing is among the most affordable roofing options, with material and installation costs typically lower than shingles or metal roofs. The environmental footprint includes petroleum-based materials; some manufacturers offer recycled content options or more recyclable components in certain products. Replacement frequency is a factor, as shorter lifespans imply more frequent budgeting for future repairs or replacement. For eco-conscious projects, evaluating life-cycle costs and potential recycling options at end of life is prudent.
Comparison With Other Roofing Materials
When selecting a roof, compare asphalt rolled roofing to common alternatives:
- provide greater durability, multi-layer protection, and longer lifespans but at higher cost and more complex installation.
- offers exceptional longevity, wind resistance, and fire resistance but requires higher upfront investment and specialized installation.
- membranes deliver strong water resistance for flat roofs but may involve more complex installation and maintenance.
- are durable but heavy and costly, unsuitable for very low-sloped or lightweight structures.
Asphalt rolled roofing sits between low-cost, short-term options and more durable systems, making it attractive for temporary or budget-driven projects on low-slope roofs.
Frequently Asked Questions
Common queries include:
- What is the typical lifespan? Often 5–15 years, depending on climate and maintenance.
- Can it be used on pitched roofs? It is best suited for low-slope roofs; steep pitches reduce wind resistance and cause fast wear.
- Is it repairable? Yes, small patches and sealant can fix leaks; recurring issues may indicate replacement is needed.
- Is it fire-rated? Most asphalt rolled roofing offers basic fire resistance, but local code requirements vary; check ratings for specific products.