How Long Is a Roll of Rolled Roofing and What to Know Before Buying

Rolled roofing is a popular and cost-effective option for low-slope roofs. Whether you’re a homeowner or a professional contractor, understanding how long a roll of rolled roofing is can help you plan your project accurately and avoid costly mistakes. This guide provides detailed information on the standard dimensions, coverage, and practical considerations when using rolled roofing materials.

Standard Dimensions of Rolled Roofing

Most rolls of rolled roofing measure approximately 33 feet in length and 3 feet in width. This results in a coverage area close to 100 square feet per roll. These dimensions are standard across many manufacturers, making it easier to estimate the amount of material needed for roofing projects.

The length and width can vary slightly based on specific product types or brands. Some specialty rolls may offer different sizes, but the 33 by 3 feet roll is the industry benchmark for residential and small commercial roofing applications.

Types of Rolled Roofing Materials

Rolled roofing comes in various materials suited for different climates and durability needs. The common types include:

• Asphalt-saturated felt: The most basic and economical type, providing waterproofing but limited longevity.
• Modified bitumen: Enhanced with polymers for better elasticity and weather resistance, often requiring torch-down installation.
• Mineral-surfaced rolled roofing: Coated with granules to improve UV protection and aesthetics, often used in both residential and commercial roofs.

Choosing the correct material impacts the roll length available and how the product is installed.

Calculating Coverage and Quantity Needed

To estimate how many rolls you’ll need, calculate the total roof area first. Since each roll covers roughly 100 square feet, divide the total roof square footage by 100.

Keep in mind factors such as roof pitch, overlaps, and waste material during installation which will increase material needs by approximately 10-15%. For example, a 1000 square foot roof may require around 11 to 12 rolls to account for waste and overlap.

Installation Considerations

The length of a rolled roofing roll affects installation ease and effectiveness. Shorter roofs may benefit from fewer seams, while longer roofs require multiple rolls to cover the area completely.

Rolled roofing is typically installed from the bottom edge upward with seams overlapping to prevent water infiltration. Understanding the roll length helps in planning the number of seams and ensuring that rolls align correctly to minimize leaks.

Durability and Maintenance

While rolled roofing is an affordable solution, it is generally less durable than traditional shingles. Most rolled roofing lasts 5 to 10 years depending on material quality and climate exposure.

Regular inspections and timely repairs can extend the life of rolled roofing. Knowing the size and type of your roofing rolls helps identify the exact materials for repair or replacement sections.

Common Uses for Rolled Roofing

Rolled roofing is ideal for:

• Low-slope residential roofs
• Garage and shed roofs
• Temporary roofing solutions
• Industrial or agricultural buildings

Its length and width make it simple to work with for these smaller or less complex applications.

Buying Tips for Rolled Roofing

When purchasing rolled roofing, consider the following:

• Confirm roll dimensions: Verify the exact length and width with your supplier as they can slightly vary by manufacturer.
• Match roofing underlayment: Choose compatible underlayment to ensure proper adhesion and waterproofing.
• Buy extra material: Always purchase 10-15% more to cover waste from cutting and mistakes.
• Check shipping and delivery options: Rolls can be heavy and cumbersome; ensure you can receive and store them properly before installation.

Summary Table of Rolled Roofing Roll Specs