You can buy roofing underlayment by the roll at big box stores, online retailers, and roofing supply shops. Most places sell it in standard widths and lengths that fit any roof size. The best places to shop are home improvement stores, Amazon, and specialty roofing suppliers. Prices vary based on the type and brand you pick. Many stores offer delivery right to your home. Getting the right underlayment is key because it protects your roof from water damage and extends its lifespan.
Home Improvement Stores
Home Depot and Lowe’s are the easiest places to find roofing underlayment by the roll. Both stores carry multiple brands and types. You can shop in person or order online for pickup or delivery.
Prices at these stores range from budget-friendly to premium options. Most rolls cost between $50 and $150 depending on the size and quality. Staff can help you pick the right type for your roof.
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Online Retailers
Amazon, eBay, and Wayfair sell roofing underlayment with fast shipping options. Online shopping lets you compare prices from many sellers at once.
You save time by ordering from home. Delivery usually takes 2 to 7 days. Check customer reviews before buying to make sure you get quality products. Many sellers offer free shipping on large orders.
Roofing Supply Shops
Local roofing suppliers often have the biggest selection and best prices for bulk orders. These shops specialize in roofing materials.
According to the U.S. roofing industry, there are over 99,000 roofing companies in America, and many of them work with local suppliers. Staff at these shops know the products well and can answer technical questions. If you are replacing your roof, consider that the average roof replacement cost is $9,526, according to RubyHome (2025). Good underlayment adds to that cost but pays off in the long run.
Popular Underlayment Types and Where to Buy Them
| Underlayment Type | Best Place to Buy | Price Range |
|---|---|---|
| Asphalt-Saturated Felt | Home Depot, Lowe’s | $40, $80 |
| Synthetic Underlayment | Roofing suppliers, Amazon | $80, $150 |
| Rubberized Asphalt | Specialty roofing shops | $100, $180 |
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Tips for Buying Underlayment
Measure your roof before you buy. Most rolls cover about 400 square feet. According to the National Association of Home Builders, the average U.S. roof size is 2,647 square feet or 26.47 squares.
Check what type of shingles you have. According to industry data, asphalt shingles account for about 80% of roofing projects in the U.S. Different shingles need different underlayment types. Always buy from a trusted seller with good reviews. Compare prices across at least three stores before making your final choice.
Connect with an experienced roof contractor to discuss your roofing needs and schedule an inspection.