Roofing felt paper is an essential underlayment material that provides an additional layer of protection between your roof deck and shingles. Understanding the costs associated with roofing felt paper is crucial for budgeting your roofing project effectively. The average cost of roofing felt paper ranges from $0.05 to $0.50 per square foot, depending on the type, quality, and thickness of the material. This article explores the various factors that influence roofing felt paper costs, installation expenses, and how to maximize your investment in this vital roofing component.
| Felt Type | Cost Per Roll | Cost Per Square Foot | Coverage Area |
|---|---|---|---|
| #15 Felt | $17-$30 | $0.05-$0.15 | 400 sq ft |
| #30 Felt | $25-$50 | $0.10-$0.25 | 200 sq ft |
| Synthetic Felt | $80-$150 | $0.20-$0.50 | 400-1000 sq ft |
Roofing felt paper, also known as tar paper or builder’s paper, is a water-resistant barrier installed between the roof deck and the outer roofing material. Traditionally made from natural materials like cellulose fibers saturated with asphalt, modern versions may incorporate fiberglass or synthetic components for enhanced durability.
The primary purpose of roofing felt is to provide a secondary water barrier that protects your home from moisture intrusion if the primary roofing material fails. It also prevents resins from wood roof decking from reacting with asphalt shingles and helps to even out the surface for shingle installation.
Roofing felt comes in different weights, typically #15 (15-pound) and #30 (30-pound), referring to the weight of the material per 100 square feet. Heavier weights generally offer better protection and durability but come at a higher cost. Synthetic alternatives have also gained popularity for their enhanced tear resistance and longer lifespan.
Types of Roofing Felt Paper and Their Costs
The market offers several types of roofing felt paper, each with distinct features and price points. Understanding these options helps in making an informed decision based on your roofing needs and budget constraints.
#15 Felt Paper
#15 felt is the standard weight option, offering basic protection at an economical price. A roll of #15 felt typically costs between $17 and $30, covering approximately 400 square feet, which translates to $0.05-$0.15 per square foot. This type is suitable for most residential roofing applications, especially in moderate climates with limited extreme weather events.
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#30 Felt Paper
#30 felt provides enhanced durability and protection compared to #15 felt. It’s thicker and heavier, making it more resistant to tearing during installation and offering better waterproofing properties. The price range for #30 felt is typically $25 to $50 per roll, covering about 200 square feet, or $0.10-$0.25 per square foot. This type is recommended for roofs in regions with severe weather conditions or for steep-slope applications.
Synthetic Felt
Synthetic roofing felt is made from polymers rather than traditional organic materials. These modern alternatives offer superior tear resistance, UV stability, and moisture protection. Synthetic felt costs between $80 and $150 per roll, covering 400-1000 square feet, which equates to $0.20-$0.50 per square foot. While more expensive initially, synthetic felt often provides better long-term value through increased durability and performance.
Specialty Felt Products
Specialty products include self-adhering felt with added features like anti-slip surfaces, enhanced UV protection, or integrated moisture barriers. These premium options typically cost $0.30-$0.75 per square foot but offer additional benefits that may justify the higher price point, especially for high-end roofing projects or challenging installations.
Factors Affecting Roofing Felt Paper Costs
Several factors influence the final cost of roofing felt paper for your project. Understanding these variables helps in developing an accurate budget and making cost-effective choices.
Material Quality and Weight
Higher quality and heavier weight felt papers generally command premium prices but offer enhanced durability and protection. The difference between economy and premium products can be substantial, with premium options often lasting twice as long as budget alternatives.
Project Size
Larger roofs require more material, increasing overall costs. However, bulk purchasing for larger projects may reduce the per-unit cost. Most suppliers offer discounts for volume purchases, which can result in savings of 10-15% for projects exceeding 2,000 square feet.
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Geographical Location
Regional market conditions significantly impact felt paper prices. Areas with higher living costs or remote locations often see premium pricing due to increased shipping costs or limited competition. Price variations of 20-30% between different regions of the country are common.
Seasonal Factors
Roofing material prices, including felt paper, can fluctuate seasonally. Prices typically increase during peak roofing season (late spring through fall) and may decrease during winter months when demand is lower. Strategic timing of purchases can result in savings of 5-15%.
Brand and Manufacturer
Established brands with strong warranties and proven performance records generally charge more than lesser-known manufacturers. Premium brands may cost 20-40% more but often provide superior quality assurance and customer support.
Average Cost Breakdown for Roofing Felt Paper
To understand the total investment required for roofing felt paper, it’s essential to break down all associated costs beyond just the material itself.
| Cost Component | Typical Range | Percentage of Total Cost |
|---|---|---|
| Materials (Felt Paper) | $50-$500 | 30-40% |
| Installation Labor | $70-$100 per hour | 40-50% |
| Fasteners and Adhesives | $20-$50 | 5-10% |
| Old Material Removal | $40-$80 per hour | 10-15% |
| Disposal Fees | $50-$200 | 5-10% |
Material Costs Per Project Size
For an average 1,500 square foot roof, the felt paper material costs range from $75-$225 for #15 felt, $150-$375 for #30 felt, and $300-$750 for synthetic options. These figures represent just the material component and don’t include installation or additional supplies.
Labor and Installation
Professional installation typically ranges from $0.20-$0.40 per square foot, depending on roof complexity and local labor rates. For a 1,500 square foot roof, installation labor costs would range from $300-$600. Complex roof designs with multiple penetrations, steep slopes, or difficult access points can increase labor costs by 25-50%.
Additional Materials and Supplies
Fasteners, adhesives, and seam sealants add approximately $0.02-$0.05 per square foot to the project cost. Special edge treatments or custom cutting around vents, chimneys, and skylights may require additional materials, increasing costs by 5-15% for complex installations.
Removal and Disposal
If replacing existing felt, removal and disposal costs typically add $50-$200 to the project total, depending on local disposal regulations and fees. Some areas charge by weight, while others charge flat fees for construction waste disposal.
Cost Comparison: Roofing Felt Paper vs. Alternatives
Understanding how roofing felt paper compares to alternative underlayment options helps in making cost-effective decisions that align with your specific needs and budget.
| Underlayment Type | Cost Per Square Foot | Lifespan | Best For |
|---|---|---|---|
| Traditional Felt (#15) | $0.05-$0.15 | 15-20 years | Budget projects, moderate climates |
| Heavy Felt (#30) | $0.10-$0.25 | 20-30 years | Harsh weather regions, steep roofs |
| Synthetic Underlayment | $0.20-$0.50 | 25-50 years | Long-term durability, extreme climates |
| Rubberized Asphalt | $0.75-$2.00 | 30-50 years | Ice dam protection, leak-prone areas |
| Self-Adhering Ice & Water Shield | $0.80-$2.50 | 30-50 years | High precipitation areas, valleys, eaves |
Long-Term Cost Analysis
While traditional felt paper offers the lowest initial investment, synthetic underlayments often provide better value over time due to their extended lifespan and enhanced protection. The cost-per-year of service is frequently lower for premium materials despite their higher upfront expense.
For example, #15 felt at $0.10 per square foot with a 15-year lifespan costs approximately $0.007 per year of service. In contrast, synthetic underlayment at $0.35 per square foot with a 40-year lifespan costs about $0.009 per year – only slightly more expensive for significantly better protection.
Climate-Specific Considerations
In regions with extreme weather conditions, investing in higher-grade underlayments often pays off through reduced repair and replacement costs. Areas prone to high winds, heavy rain, or severe temperature fluctuations benefit most from premium underlayment options, which can prevent costly water damage repairs averaging $2,500-$5,000 per incident.
Installation Costs for Roofing Felt Paper
Installation represents a significant portion of the total cost when using roofing felt paper. Understanding these expenses helps in comprehensive project budgeting.
Professional Installation Pricing
Professional roofers typically charge $70-$100 per hour for felt paper installation, with most residential projects requiring 4-8 labor hours depending on roof size and complexity. The average cost for professional installation ranges from $0.20-$0.40 per square foot, with a typical 1,500 square foot roof costing $300-$600 for labor alone.
Factors Affecting Installation Costs
Several variables can impact installation expenses:
- Roof pitch and accessibility: Steeper roofs require additional safety equipment and slow work pace, increasing costs by 25-75%
- Roof complexity: Multiple levels, dormers, valleys, and penetrations increase labor time and material waste
- Regional labor rates: Metropolitan areas typically have higher labor costs than rural regions
- Seasonal demand: Peak season installations may command premium pricing
- Project urgency: Emergency installations often incur rush charges of 15-30%
Installation Timeline
Standard felt paper installation typically requires 1 day for an average home, while larger or more complex roofs may need 2-3 days. This timeline affects both labor costs and the potential for weather-related disruptions, which can increase project expenses if multiple site visits are required.
Cost-Saving Tips for Roofing Felt Paper Projects
Implementing strategic approaches can help reduce the overall cost of your roofing felt paper project without compromising quality or protection.
Timing Your Purchase
Scheduling your roofing project during off-peak seasons (late fall through winter in most regions) can result in material discounts of 10-20% and reduced labor rates. Many contractors offer promotional pricing during slower periods to maintain steady work for their crews.
Bulk Purchasing
For larger projects, buying felt paper in bulk directly from suppliers rather than retail outlets can reduce material costs by 15-30%. Some manufacturers offer contractor pricing to homeowners for large orders exceeding certain thresholds.
Partial DIY Approach
Consider handling the demolition and cleanup portions of the project yourself while leaving the technical installation to professionals. This hybrid approach can reduce labor costs by 20-30% while ensuring proper installation of the felt paper itself.
Comparison Shopping
Obtaining multiple quotes from different suppliers and contractors is essential. Price variations of 25-40% for identical materials and services are common in the roofing industry. Online marketplaces often offer competitive pricing compared to brick-and-mortar retailers.
Warranty Considerations
Some premium felt papers offer extended warranties that may justify their higher initial cost through reduced replacement frequency and potential coverage of related damages. Evaluate the terms carefully to determine if the additional investment provides meaningful protection.
When to Replace Roofing Felt Paper and Associated Costs
Understanding the lifespan of roofing felt paper and recognizing when replacement is necessary helps in planning for this recurring expense.
Typical Lifespan
Traditional felt paper typically lasts 15-30 years, depending on the weight and quality, while synthetic underlayments can perform effectively for 25-50 years. However, these estimates assume proper installation and normal weather conditions.
Signs Replacement Is Needed
Several indicators suggest that felt paper may need replacement:
- Water stains on ceilings or walls below the roofline
- Visible deterioration of the felt during roof repairs
- Brittle or crumbling felt material when exposed
- Mold or mildew growth in the attic space
- Shingle damage allowing water penetration to the underlayment
Replacement Cost Scenarios
| Scenario | Typical Cost Range | Considerations |
|---|---|---|
| Full Replacement (during re-roofing) | $0.25-$0.65 per sq ft | Most economical timing; combined labor efficiencies |
| Partial Replacement (damaged areas) | $2-$5 per sq ft | Higher unit cost due to smaller scale and matching challenges |
| Emergency Replacement | $3-$7 per sq ft | Premium pricing for urgent service and potential weather complications |
The most cost-effective approach is to replace felt paper during planned roof replacement, as the labor costs for tear-off and disposal are already included in the project. Standalone felt replacement typically costs 3-5 times more per square foot than replacement during a complete re-roofing project.
Regional Cost Variations for Roofing Felt Paper
The cost of roofing felt paper varies significantly across different geographic regions due to multiple factors including climate requirements, local building codes, and market conditions.
Geographic Price Differences
| Region | Average Cost Factor | Common Felt Type |
|---|---|---|
| Northeast | 110-125% of national average | #30 or synthetic (ice/snow concerns) |
| Southeast | 90-100% of national average | Synthetic (humidity resistance) |
| Midwest | 95-105% of national average | #30 (temperature extremes) |
| Southwest | 85-95% of national average | #15 or synthetic (UV resistant) |
| West Coast | 115-130% of national average | Synthetic or rubberized (seismic/fire codes) |
| Alaska/Hawaii | 140-175% of national average | Premium synthetic (extreme conditions) |
Urban vs. Rural Pricing
Urban areas typically see prices 10-25% higher than rural regions due to increased operational costs, higher labor rates, and stricter building code requirements. However, urban areas may offer more competitive pricing among multiple suppliers, potentially offsetting some of these increases.
Climate-Based Requirements
Local climate conditions often necessitate specific types of underlayment, affecting regional costs:
- Snow/ice regions require heavier underlayments or ice/water shields at roof edges
- Hurricane-prone areas often mandate stronger attachment methods and water-resistant underlayments
- High-temperature regions benefit from UV-resistant synthetic materials
- Regions with significant temperature fluctuations require more flexible underlayments
These climate-specific requirements can increase the average cost of appropriate felt paper by 15-40% compared to basic options suitable for moderate climates.
DIY vs. Professional Installation: Cost Analysis
Deciding between DIY and professional installation involves weighing immediate cost savings against potential long-term expenses and performance issues.
DIY Installation Costs
DIY installation eliminates labor costs but requires purchasing or renting specific tools and equipment:
| Item | Typical Cost | Notes |
|---|---|---|
| Roofing Nails/Staples | $20-$40 | Galvanized or stainless steel recommended |
| Hammer Tacker/Stapler | $25-$50 | Essential for efficient installation |
| Utility Knife/Roofing Cutter | $10-$30 | Multiple blades needed for larger projects |
| Safety Equipment | $100-$300 | Harness, rope, roof brackets, etc. |
| Ladder | $150-$400 | Extension ladder of appropriate height |
The total DIY cost savings typically range from $300-$800 for an average home, representing approximately 40-60% savings on installation labor. However, these savings should be weighed against the following considerations.
Hidden Costs of DIY Installation
Several factors may offset the apparent savings of DIY installation:
- Time investment: 2-3 times longer than professional installation
- Learning curve: First-time installations often require redoing sections
- Material waste: 10-20% higher material usage due to mistakes and improper sizing
- Warranty concerns: Many roofing manufacturers void warranties for non-professional installation
- Risk of damage: Improper installation can lead to leaks and expensive repairs
- Safety risks: Potential for injury and associated medical costs
When Professional Installation Is Worth It
Professional installation is particularly justified in these scenarios:
- Complex roof designs with multiple angles, valleys, or penetrations
- Steep pitch roofs requiring specialized safety equipment
- Homes in regions with extreme weather conditions requiring precise installation
- Projects requiring building permits and inspections
- When manufacturer warranties depend on professional installation
Most professionals can install felt paper on an average home in 4-8 hours, compared to 2-3 days for a typical DIY installation. This efficiency, combined with proper technique and reduced risk of errors, often justifies the additional expense for most homeowners.
Purchasing Strategies for Roofing Felt Paper
Implementing strategic purchasing approaches can help optimize your investment in roofing felt paper while ensuring you receive quality materials appropriate for your specific project.
Best Places to Purchase
Different purchasing channels offer varying advantages:
- Roofing supply companies: Typically offer the best selection and competitive pricing for bulk purchases, with average savings of 15-25% compared to retail outlets
- Home improvement stores: Convenient for smaller projects with moderate pricing, often within 5-15% of specialized suppliers
- Online retailers: Can offer significant discounts (10-30%) but require careful attention to shipping costs and potential material damage during transit
- Direct from manufacturers: Often the most economical for large projects, with potential savings of 20-40% for bulk orders
Quantity Calculation
To avoid costly shortages or excessive waste, accurate quantity calculation is essential. The standard formula adds 10-15% to the basic roof square footage to account for overlaps, wastage, and complex features:
Required material = Roof square footage × 1.15
For example, a 1,500 square foot roof would require approximately 1,725 square feet of felt paper. This translates to about 5 rolls of #15 felt (at 400 sq ft per roll) or 9 rolls of #30 felt (at 200 sq ft per roll).
Quality Indicators
When selecting roofing felt paper, several quality indicators help ensure you’re getting a suitable product:
- ASTM certification (ASTM D226 or D4869 for traditional felts)
- UL fire resistance rating
- Consistent thickness throughout the roll
- Absence of tears, holes, or thin spots
- Uniform saturation with no dry areas
- Manufacturer’s warranty duration and terms
Premium products typically offer clearer labeling, more detailed installation instructions, and more comprehensive warranty coverage, justifying their 15-30% price premium over economy versions.
How to Get the Best Roofing Quotes
- Prioritize Workmanship
A roof is one of your home’s most important investments. Always choose a contractor based on experience and reputation — not just price. Poor installation can lead to expensive problems down the road. - Compare Multiple Estimates
Don’t settle for the first quote you receive. It’s always a smart move to compare at least three bids from local roofing professionals. You can 877-801-4315 to get local quotes from roofing contractors in your area, available across the United States. - Use Negotiation Tactics
After selecting a trusted roofer, be sure to use our proven tips — How to Negotiate with Roofing Contractors — to secure the best possible final price without cutting corners.