Re Felt Flat Roof Cost
Re Felt Flat Roof Cost
The cost to re-felt a flat roof in the United States depends on roof size, material choices, labor rates, and roof condition. Traditional asphalt felt is the most common and budget-friendly option, while modern alternatives like rubberized membranes or modified bitumen can raise costs. Homeowners should weigh durability, installation time, and long-term maintenance when estimating total expenses. This guide breaks down material and labor costs, typical project scopes, and practical tips to budget accurately for a re-felted flat roof.
Key Cost Components
Material costs drive the baseline price. Traditional 15–30 lb asphalt felt is the most economical option, often paired with an asphalt or rubberized cap sheet. Heavier-duty materials, such as modified bitumen or single-ply membranes, cost more per square foot but offer longer lifespans and better weather resistance. The thickness and number of felt layers (plies) directly influence materials costs and installation time.
Labor costs cover removal of old roofing, surface preparation, installation of new felt, and final waterproofing layers. Labor rates vary regionally and depend on roof access, complexity, and whether additional repairs (like decking replacement) are needed. Expect higher labor costs in urban areas or regions with skilled-roofing labor shortages.
Scope and condition of the existing roof affects pricing. If the deck has deteriorated, it requires replacement or repair before felting, increasing both material and labor expenses. Likewise, roofs with obstructions, vents, or skylights add to the time and complexity of installation.
Typical Cost Ranges
Costs are presented as per-square-foot estimates and for common residential roof sizes. Prices assume competent, licensed installation and standard climate conditions.
- Thin felt (1 layer, 15–30 lb) with basic resurfacing: approximately $2.50 to $5.50 per square foot.
- Two-ply felt system with asphalt cap sheet: roughly $4.50 to $8.50 per square foot.
- Modified bitumen or rubberized asphalt installation: about $5.50 to $12.00 per square foot.
- Removal of existing roof and replacement with new felt: often $8.00 to $15.00 per square foot, depending on deck condition and added waterproofing layers.
- Average 1,000–1,500 sq ft home flat roof project: $6,000 to $18,000 overall, typical mid-range around $9,000 to $12,000.
Breaking Down a Sample Project
Consider a 1,200 square foot flat roof needing re-felting with two plies of asphalt felt and minor deck repairs. Material costs might run $0.80–$1.50 per sq ft for felt, with $1.50–$3.50 per sq ft for additional membranes and lapping. Labor could be $2.50–$4.50 per sq ft for removal, preparation, and felting. Deck repair adds $1.00–$3.00 per sq ft if needed. In total, a typical project might range from $7,000 to $14,000.
Material Choices And Their Impact
Asphalt felt with cap sheet is the most affordable route and widely available. It’s suitable for moderate climates and short-to-mid-term lifespans. Modified bitumen offers enhanced durability and UV resistance, with higher initial costs but longer intervals between re-felts. Rubberized or single-ply membranes provide excellent waterproofing and flexibility, often preferred for complex roofs or areas with severe weather, though they come at a higher price point.
Regional Variations And Seasonal Factors
Labor rates vary by region due to living costs and demand. The Northeast and West Coast typically see higher costs than the Midwest. Weather influences scheduling; spring and summer are peak periods, sometimes driving labor costs up or causing project delays. Weatherproofing projects benefit from dry, mild conditions for best sealant performance and faster curing times.
What Affects Final Pricing
- Roof size and shape: Irregular shapes or multiple levels increase labor time.
- Deck condition: Damaged plywood or rot requires replacement, increasing costs.
- Accessibility: Difficult access, scaffolding needs, or proximity to landscaping adds to labor.
- Underlayment and drainage: Proper slope, edge details, and flashings affect material use and labor.
- Warranties and workmanship: Longer warranty terms and certified installers may raise upfront costs but improve long-term value.
Budgeting Tips And Cost-Saving Strategies
To manage costs without sacrificing quality, consider the following strategies. Get multiple written estimates from licensed roofing contractors to compare materials and timelines. Ask about deck repairs upfront so you understand potential hidden costs. Choose a mid-range felt or cap sheet if the climate requires decent durability but a high-end membrane isn’t necessary. Plan for maintenance with regular inspections after severe weather to extend the roof’s life and avoid costly surprises.
Choosing The Right Contractor
Select a contractor with demonstrated experience in flat-roof felting and proper licensing, insurance, and warranty options. Check references, review completed projects, and verify material compatibility with the roof system. A detailed written proposal should outline scope, materials, labor, timelines, and cleanup. Ensure adherence to local building codes and permit requirements to prevent compliance issues.
Maintenance And Longevity
Regular inspections and minor repairs extend the life of a re-felted flat roof. Schedule checks after heavy rainfall, windstorms, or hail. Keep drainage paths clear and address ponding water promptly. While felt roofs are not as long-lasting as membranes, scheduled maintenance can optimize performance and delay costly full replacements.
Frequently Asked Questions
- How long does a re-felted flat roof last? Typical lifespans range from 10 to 20 years, depending on material and climate, with proper maintenance.
- Is re-felting cheaper than a full roof replacement? Yes, generally, but a full replacement may be more cost-effective long-term in some cases.
- Can I DIY a felt roof? Homeowners can perform basic prep, but proper installation, flashing, and safety require professional roofing experience.