Rolled roofing, often called mineral-surface roofing or MSR, is a budget-friendly and simple-to-install material that ships in rolls covering up to 100 square feet. Each roll behaves like one oversized shingle: you unroll it across a low-slope roof and overlap the next course. It is a common choice for sheds, carports, and outbuildings, and a temporary covering for houses awaiting a full re-roof. For buildings that need more than a stopgap, the same low-slope conditions are often handled with rubber membranes, so it pays to compare rolled asphalt with EPDM rubber roofing membranes before you commit.
It does not match the looks of composite shingles or standing seam metal, but its low price and fast installation keep it in steady demand. One roll weighs about 72 pounds and covers the same 100 square feet as a roofing square of shingles, which makes pricing a small roof simple. The trade-off is durability: the material is thin and does not last as long as the alternatives.
What Rolled Roofing Is and How It Is Made
Rolled roofing is asphalt-saturated felt coated on one side with mineral granules. Manufacturers press the granules into the hot asphalt so the surface sheds water and reflects sunlight. Rolls run about 36 inches wide and 36 feet long, for exactly 100 square feet of coverage.
The key difference from composite shingles is scale. Shingles are individual pieces laid in overlapping rows, while rolled roofing arrives as one continuous sheet per course, which speeds installation and cuts the number of exposed fasteners. On roofs where a flexible sheet is the better answer, TPO and PVC single-ply membranes offer a thermoplastic alternative with heat-welded seams and a longer service life.
Mineral-Surface Roofing Grades
MSR rolls come in weights from about 90 to 240 pounds per square. Heavier rolls carry more asphalt and more granules, so they resist punctures and foot traffic better than lightweight rolls. A 90-pound roll suits a small shed, while a 240-pound roll behaves closer to a shingle roof and fits a more permanent installation.
Saturated Felt and Underlayment Grades
A related product, saturated felt, is asphalt-impregnated builders felt used mainly as underlayment beneath other roofing materials. It is thinner than MSR, has no granule surface, and is not designed to be the final weather layer.
| Property | Typical value |
|---|---|
| Roll width | 36 inches |
| Roll length | 36 feet |
| Coverage per roll | 100 square feet, or 1 roofing square |
| Roll weight | 72 to 90 pounds for standard MSR; heavy grades reach 240 pounds per square |
| Recommended minimum slope | 2:12 for most MSR applications |
Before any membrane goes down, the deck needs a clean, dry surface and enough slope to drain water, since ponding water is the enemy of every low-slope roof.
Rolled Roofing Costs and How to Estimate Them
Rolled roofing is usually the cheapest way to cover a low-slope roof. Material runs from about $0.50 to $1.50 per square foot depending on weight and brand, which puts a 100-square-foot roll at $50 to $150. Asphalt shingles run $1.50 to $4.50 per square foot installed, and standing seam metal starts around $6. The savings come from material price and installation speed.
Labor costs depend on who does the work. A homeowner can cover a small shed in a weekend, but a two-story house with dormers, valleys, and penetrations is a different job. On larger or steeper roofs, re-roofing with a roofing company you can trust matters most when the work involves structural issues or a pitch that makes walking the deck dangerous.
Estimating Your Roof Area
Measure the roof in square feet and divide by 100 for the number of rolls. A 12 by 10 foot shed roof is 120 square feet, so one roll covers it with a little left over. Add 10 to 15 percent for laps, ridges, and cut pieces.
Where the Savings Disappear
The low upfront price loses its advantage if the roof needs frequent repair. Because rolled roofing is thin, it is vulnerable to hail, falling branches, and foot traffic, and a roof that fails in five years costs more per year than one that lasts twenty. Divide the installed cost by the expected lifespan when comparing materials.
Where Rolled Roofing Makes Sense
Rolled roofing suits buildings where appearance is secondary and cost is the deciding factor. The most common applications:
- Sheds, barns, and outbuildings
- Carports and porch roofs
- Low-slope additions and bump-outs
- Mobile homes and manufactured housing
- Temporary patching until a full re-roof is scheduled
It is also a legitimate choice on houses when money is tight and the roof will be replaced soon. Many homeowners treat it as a stopgap: cover the leaks now, save for a permanent roof later. If you want a middle path between bare asphalt and premium panels, synthetic roofing materials made from modern polymers offer different trade-offs.
When a Temporary Fix Becomes Permanent
A rolled roof installed as a stopgap often lasts longer than planned, which is fine if it was installed well. The problem arrives when a roof meant to carry three years is still leaking in year eight, patched so many times that the patches cost more than a replacement.
Check local building codes before using rolled roofing on a dwelling. Many jurisdictions restrict MSR to outbuildings or require a minimum slope, and some insurers charge more for rolled roofs on houses because of the shorter service life.
Lifespan, Durability, and Weather Performance
A well-installed rolled roof lasts 5 to 15 years depending on the weight of the material, the slope, and the climate. That range sits far below the 20 to 30 years typical of asphalt shingles and the 50-plus years expected of slate or metal; thin material simply has less to absorb hail, foot traffic, and thermal movement.
Heat is the main enemy. The dark asphalt surface absorbs sunlight, and on a low-slope roof the temperature climbs high enough to soften the coating. Granules shed over time, and once they are gone the asphalt erodes quickly. At the opposite end of the durability spectrum, slate roofing systems show how far a roof can go when the material is dense, heavy, and fireproof.
Factors That Shorten a Rolled Roof’s Life
- Shallow slopes below 2:12 that let water pond
- Standing water after rain, which breaks down asphalt
- Foot traffic during maintenance or cleaning
- Hail, which dents the surface and knocks off granules
- Tree branches rubbing the surface
- Poor overlap or nailing patterns at installation
Signs a Rolled Roof Is Failing
Look for bare spots where granules have washed away, cracks along the laps, and blisters where moisture is trapped under the surface. If the roof sags or the asphalt feels sticky in warm weather, patching no longer makes sense.
Installing Rolled Roofing Step by Step
Installation is straightforward on a clean, dry deck. The work takes a full day for a small roof and needs only basic tools: a hammer or nail gun, roofing nails, a utility knife, a chalk line, and roofing cement.
- Remove the old roofing down to the deck, or verify the existing surface is smooth and compatible with a second layer.
- Sweep the deck clean and confirm it is dry; moisture trapped under the membrane causes blisters.
- Snap a chalk line at the bottom edge so the first course runs straight.
- Unroll the first course across the low edge, overhanging 1 to 2 inches at the eave, and nail every 6 inches along the top and every 12 along the bottom.
- Apply a 4-inch-wide band of roofing cement along the top edge of the installed course.
- Lay the next course so it overlaps the previous one by 2 to 4 inches, keeping laps away from water-collecting spots.
- Nail the overlapping course through both layers, then cover every nail head with cement.
- Finish the ridge with a cap strip nailed through the top course and sealed with cement.
- Trim the edges with a utility knife and seal each cut edge with roofing cement.
Fastening and Weatherproofing Details
The details decide how long the roof lasts. Nails should land in the overlap zone so the next course covers them, and each nail head gets a dab of cement. Cut edges, valleys, and flashing joints need a full coating, because exposed asphalt edges are where leaks start.
Know When to Call a Pro
A flat, simple deck is a fair DIY job. A roof with multiple slopes, skylights, or plumbing vents is not, because each penetration must be flashed correctly. If the roof is large or complex, pay for the install and keep the material savings.
Before choosing rolled roofing as a long-term answer, look at where the market is heading: metal roofing sales have outgrown the overall roofing market for years, driven by durability and energy performance. The metal roofing sales growth trend reflects a simple buyer preference: pay more up front, replace less often.
Comparing Rolled Roofing With Other Low-Slope Options
For low-slope roofs, rolled asphalt competes with single-ply membranes and built-up systems. The choice comes down to budget, lifespan, and who will install it.
| Option | Material cost per sq ft | Typical lifespan | DIY friendly |
|---|---|---|---|
| Rolled asphalt (MSR) | $0.50 to $1.50 | 5 to 15 years | Yes, on simple decks |
| EPDM rubber membrane | $2.50 to $4.50 | 20 to 30 years | Yes, with adhesive or ballast |
| TPO or PVC single-ply | $3 to $6 | 20 to 30 years | No, seams need welding |
| Standing seam metal | $6 to $12 | 40 to 60 years | No, needs specialized tools |
Climate changes the math. In hot, sunny regions, light-colored TPO and PVC reflect heat and cut cooling bills, while dark rolled asphalt absorbs it. In snow country, the roof must shed snow without ice damming, which favors steeper slopes. Rolled roofing works in both climates but ages faster where the sun is intense.
Matching the Membrane to the Building
The right choice depends on how long the building will stand and how the roof will be used. A shed that will be replaced in a decade does not need a 30-year membrane, while a house addition should not wear a material that fails before the mortgage does. Low-slope roofing membrane selection for building envelopes comes down to material performance, installation quality, and the slope itself.
When a building deserves a permanent roof, thermoset rubber membranes are the standard alternative to rolled asphalt. EPDM rubber roofing systems for commercial and residential applications cost more up front but deliver two to three times the service life, which is why owners of low-slope roofs usually make that trade.
Rolled roofing earns its place as the entry-level low-slope option: cheap, fast, and within reach of a careful do-it-yourselfer. Match the weight to the building, install the overlaps and flashings correctly, and it will carry the years you need it to.