Roofing paper, commonly known as roofing felt or underlayment, is a fundamental layer installed beneath shingles or other roofing materials. Prices vary by type, size, and grade, and understanding these factors helps homeowners budget accurately. This guide covers typical costs, options, and practical tips for choosing the right roofing paper for American projects.
Types Of Roofing Paper And Typical Prices
Roofing paper comes in several forms, each with distinct cost profiles. The most common categories for residential projects are standard asphalt-saturated felt, and synthetic underlayments. Asphalt felt is traditional and affordable, while synthetic underlayments offer higher durability and weather resistance. Price ranges reflect material quality, width, and length per roll.
- Asphalt-saturated felt (15# or 30#): The older, traditional option. 15-pound felt is lighter and cheaper; 30-pound felt is thicker and more durable. Typical price per roll (36 inches wide, 100 feet long): $15–$35 for 15# and $25–$45 for 30#.
- Synthetic underlayment: Made from polymers, offering superior tear resistance and water resistance. Common widths include 4 feet (48 inches) and lengths around 100–250 feet. Typical price per roll: $40–$90.
- Roofing felt with ice and water shield features: Hybrid products provide additional protection at eaves and penetrations. Price per roll varies widely, generally $60–$120 depending on width and thickness.
Key Factors That Influence Price
Several variables determine the final cost of roofing paper. Understanding these helps buyers compare options accurately and avoid overpaying.
- Material Type: Asphalt felt tends to be cheaper than synthetic underlayment. Hybrid products with built-in ice and water shield are the most expensive.
- Width And Length: Wider rolls and longer lengths increase total price but may reduce waste. Common sizes are 3 feet by 100 feet, 4 feet by 100–250 feet, and 36–54 inches widths depending on product.
- Durability And Tear Resistance: Higher tear resistance raises cost but can save time during installation and reduce damage in windy conditions.
- UV Exposure Rating: Some underlayments are designed for longer exposure before shingling, affecting price.
- Brand And Availability: Reputable brands and locally stocked products can influence price due to supply and demand.
- Local Codes And Climate: Regions with harsher winters or frequent storms may require higher-performance underlayments, increasing cost.
How To Calculate The Amount You Need
Estimating the number of rolls required helps control costs and minimize waste. Measure the roof area or consult your contractor for precise calculations. A typical approach uses roof area in square feet and roll coverage per roll.
- Step 1: Determine roof area by multiplying length by width for each section, then add all sections together.
- Step 2: Check the product’s coverage (width × length). For example, a 36″ × 100′ roll covers about 300 square feet.
- Step 3: Divide total roof area by the roll coverage to estimate rolls needed, adding a 5–10% waste buffer for waste due to valleys, hips, and waste cuts.
Price Ranges By Type And Size
Below is a practical snapshot of typical costs to help with budgeting. Actual prices vary by region and retailer.
| Type | Width | Length | Typical Price |
|---|---|---|---|
| Asphalt Felt | 36″ | 100 ft | $15–$25 |
| Asphalt Felt | 36″ | 250 ft | $25–$40 |
| Asphalt Felt | 54″ | 100 ft | $25–$45 |
| Synthetic Underlayment | 48″ | 100 ft | $40–$70 |
| Synthetic Underlayment | 48″ | 250 ft | $80–$160 |
| Ice & Water Shield Hybrid | 36″ | 75–100 ft | $60–$120 |
Where To Buy And How To Compare Prices
Retail channels include big-box home improvement stores, specialty roofing suppliers, and online marketplaces. Price comparisons should consider:
- Unit Price Per Square Foot: Divide price by roll coverage in square feet to compare across products.
- Delivery Fees: Some retailers charge for heavy rolls; check if delivery is included.
- Return Policy: Ensure options exist if material is defective or unused.
- Warranties: Some higher-end underlayments come with manufacturer warranties against defects.
Installation Considerations And Alternatives
Choosing the right roofing paper is only part of the job. Proper installation affects performance and longevity. The following guidelines help ensure effective use of roofing paper.
- Overlap And Fastening: Follow product guidelines for overlaps (commonly 2–4 inches) and nailing patterns. Use corrosion-resistant nails or staples as required.
- Underlayment For Different Roof Styles: Steeper roofs or windy climates may benefit from synthetic underlayment due to higher tear resistance.
- Climate Considerations: In regions with heavy rainfall or snow, ice and water shield layers or self-sealing underlayments can improve protection at eaves and valleys.
- Using With Shingles Or Other Materials: Confirm compatibility with the chosen roofing material and flashing details to ensure optimal performance.
- DIY vs Professional: Simple installations can be DIY-friendly, but complex roofs with many penetrations are often best handled by professionals for a watertight seal.
Practical Tips To Save On Roofing Paper Costs
Smart purchasing and planning can reduce overall project costs without compromising protection.
- Shop Around: Compare multiple retailers for bulk discounts or seasonal promotions.
- Plan For Waste: Accurately estimating rolls minimizes waste and extra trips to the store.
- Bundle With Other Materials: Some suppliers offer bundled pricing for underlayment with shingles or flashing.
- Consider Longer-Lasting Options: Synthetic underlayments may have higher upfront costs but can reduce maintenance and replacements over time.
Summary: For a typical residential project, expect to pay a broad range depending on material type and size—from roughly $15 to $120 per roll. Assess roof dimensions, climate, and the chosen underlayment’s performance to select the best value. Proper installation and compatibility with roofing materials ensure lasting protection and peace of mind.