When planning a roofing project, understanding the dimensions of rolled roofing is essential. Rolled roofing offers an affordable, efficient option for low-slope roofs or temporary protection. This material is sold in rolls that provide coverage in both length and width, influencing how much surface area can be covered per roll. Knowing the standard length and width of rolled roofing helps homeowners and contractors estimate material needs, control budgeting, and ensure a smooth installation.
| Property | Standard Measurement | Notes |
|---|---|---|
| Length per Roll | 33 feet (typically) | Varies slightly depending on manufacturer |
| Width per Roll | 36 inches (3 feet) | Standard width for residential rolled roofing |
| Coverage per Roll | 99 square feet (approximate) | May differ due to overlap during installation |
| Weight per Roll | 50 to 90 pounds | Depends on thickness and material type |
What Is Rolled Roofing?
Rolled roofing is a roofing material sold in large rolls, made primarily from asphalt-saturated felt or fiberglass mats coated with mineral granules or smooth coatings. It is designed for easy application on low-slope roofs, such as sheds, garages, or mobile homes. This material is valued for its cost-effectiveness and relatively simple installation process. Unlike shingles, rolled roofing covers a significant expanse with fewer seams.
Standard Dimensions of Rolled Roofing
The most common rolled roofing dimensions are approximately 33 feet in length and 36 inches (3 feet) in width. These dimensions enable one roll to cover around 99 square feet of roof area before factoring in overlaps and edges.
Some manufacturers may offer variations slightly longer or shorter, but the 33-foot length by 3-foot width is standard for residential use. Specialty products might have different sizes depending on purpose and material thickness.
Calculating Coverage and Quantity Needed
To estimate how many rolls you need, start with your total roof area in square feet and divide by the effective coverage of one roll.
- Step 1: Measure your roof’s length and width to establish total square footage.
- Step 2: Divide total square footage by 90 to 99 square feet per roll (accounting for overlaps).
- Step 3: Always purchase extra rolls (around 10-15% more) for waste and overlaps.
Since overlap is required between rolls to maintain waterproofing, actual coverage per roll is less than the simple length × width multiplication. Typically, installers assume a coverage area of about 90 square feet per roll.
Factors Affecting Roll Length and Coverage
Various factors influence the exact dimensions and coverage of rolled roofing:
- Material Thickness: Thicker rolls may be shorter or heavier.
- Manufacturer Specifications: Brands might produce custom sizes for commercial or residential markets.
- Installation Method: How much overlap is used affects coverage—more overlap reduces effective coverage.
- Environmental Considerations: Roof slope and weather conditions can impact how rolled roofing is installed and the quantity required.
Types of Rolled Roofing and Their Lengths
Rolled roofing comes in several varieties, influencing its length and application:
| Roll Type | Length per Roll | Typical Use |
|---|---|---|
| Asphalt-Saturated Felt | Approx. 36 feet | Underlayment beneath shingles or waterproofing |
| Mineral-Surfaced Rolled Roofing (smooth or granulated) | Usually 33 feet | Primary roofing material for low-slope roofs |
| Rubberized Asphalt Rolls | Varies, often 33 feet | High-performance waterproofing membranes |
Weight and Handling Considerations
Rolled roofing can be heavy. Standard rolls typically weigh between 50 to 90 pounds, depending on thickness and material. This weight affects transportation, handling, and installation methods. For large roofing projects, it’s advisable to account for labor requirements related to lifting and positioning rolls.
Remember to wear protective gloves and use proper lifting techniques to avoid injury.
Tips for Buying Rolled Roofing
- Buy Based on Roof Area: Measure carefully and calculate rolls required to avoid shortages.
- Verify Dimensions: Check product specifications to confirm roll length and width before purchasing.
- Account for Overlap: Plan for 10-15% extra material to ensure full coverage and accommodate mistakes.
- Consider Material Type: Choose rolled roofing suited for roof pitch, climate, and intended lifespan.
- Purchase from Reliable Suppliers: Quality material ensures better durability and performance.
Common Applications for Rolled Roofing
Rolled roofing is especially suited for the following applications:
- Low-slope residential roofs on sheds, garages, and outbuildings
- Temporary or emergency roofing protection
- Basement or foundation waterproofing membranes
- Greenhouse roofs and small-scale commercial projects
Its size and ease of installation make rolled roofing a practical choice where large surface coverage without many seams is desired.
How to Store Rolled Roofing
Proper storage extends the life of rolled roofing:
- Store rolls flat, not on their sides, to prevent deformation.
- Keep them in a dry, shaded area to avoid moisture damage and UV degradation.
- Maintain temperature control when possible, as extreme heat may soften asphalt and affect performance.
Summary
A standard roll of rolled roofing is about 33 feet long and 36 inches wide, covering approximately 90-99 square feet per roll before overlap. Knowing these measurements is crucial for accurate material estimation, budget planning, and efficient installation. Different types and manufacturers might vary slightly, so confirming specifications ahead of purchase is recommended. By understanding roll size, coverage, and other considerations, homeowners and contractors can confidently select and install rolled roofing for diverse low-slope roofing needs.