Roofing costs depend on your project and location. Check with a local pro for your specific job.
Roof underlayment replacement averages $3,300 but your total ranges from $300 to $8,200 depending on roof size, pitch, and underlayment material.
Your roof type determines which underlayment works best, with metal roofs needing ice and water shield while asphalt roofs use felt.
Budget for roof decking repairs between $2 and $5 per square foot and building permits from $150 to $500 for your replacement project.
Hiring a local roofing professional prevents water damage from improper installation and ensures your warranty coverage remains valid.
In 2026, the national average cost for roof underlayment replacement is $3,300, though most homeowners spend between $1,700 and $4,200. That range comes down to roof size and pitch, the type of underlayment you choose, and whether any decking repairs are needed along the way.
Roof size is the single biggest driver of underlayment replacement cost, with most roofers charging an average of $1.60 per square foot and prices ranging from $0.60 to $2.70 per square foot in most cases. You can calculate your roof's square footage and multiply by these rates to get a working estimate before contacting a pro.
Costs vary by roof size as shown in the breakdown below:
| Roof Size (Sq. Ft.) | Roof Size in Squares | Average Price Range in 2026 |
|---|---|---|
| 500 | 5 | $300–$1,350 |
| 1,000 | 10 | $600–$2,700 |
| 2,000 | 20 | $1,200–$5,400 |
| 2,500 | 25 | $1,500–$6,800 |
| 3,000 | 30 | $1,800–$8,200 |
Labor is the dominant expense in a roof underlayment replacement project, typically accounting for 80% to 90% of your total cost, with most homeowners paying between $1,400 and $3,800 and an average of around $2,800. Because underlayment material itself is relatively affordable, choosing a qualified contractor matters more than shopping for the cheapest materials.
Where you live affects what you pay for roof underlayment replacement, with costs running higher in states with a greater cost of living and in major metro areas ($4,800).
Regional climate also shapes costs because local weather conditions influence which roof underlayment is appropriate for your roof type. For example, metal roofs common in heavy-snowfall regions often require the best underlayment for a metal roof, which tends to cost more than underlayment suited to asphalt shingle roofs.
The following table breaks down costs by state:
| State | Average Underlayment Cost in 2026 |
|---|---|
| California | $4,800 |
| Florida | $3,400 |
| Georgia | $3,000 |
| Illinois | $3,100 |
| Michigan | $3,000 |
| New York | $4,100 |
| North Carolina | $3,300 |
| Ohio | $3,100 |
| Pennsylvania | $3,200 |
| Texas | $3,000 |
Location can also play a role in roof underlayment replacement costs because certain climates and weather conditions can dictate what type of roof underlayment is best for safety and efficiency or what's best for the particular type of roof that's most common in your area. For example, metal roofs are more common in areas where homes have steep roofs to shed heavy snowfall, and the best underlayment for a metal roof can be more expensive than what would be appropriate under an asphalt shingle roof.
There are some other important factors to consider if you want the most accurate estimate possible for your roof underlayment replacement project.
Asphalt roofs typically use roofing felt, the most affordable option, bringing costs closer to $1,700, while tile roofs call for synthetic underlayment at closer to $4,200. Your roof type determines which underlayment material is best suited for your home, and that material choice directly shapes your total replacement cost.
Check the table below for estimates based on the type of roof:
| Roof Type | Ideal Underlayment | Average Replacement Cost in 2026 |
|---|---|---|
| Asphalt | Roofing felt | $3,300 |
| Clay or tile | Synthetic | $3,600 |
| Metal | Ice and water shield | $3,800 |
| Slate | Synthetic | $3,600 |
Roof pitch affects your underlayment replacement cost in three distinct ways: steeper roofs have larger surface areas that demand more material and labor, they present greater safety challenges that can push labor rates higher, and they influence which roofing materials are suitable for your home, which in turn determines the underlayment type you need.
Because underlayment material costs vary meaningfully by type, the indirect relationship between pitch and material selection can move your final price up or down depending on what your roof requires.
The three main types of roof underlayment each carry a different material cost, ranging from $5 to $75 per square, and your choice directly impacts your total.
Felt is the most common and affordable option and is considered the best roof underlayment for asphalt shingles, while rubber is the priciest because it is the only truly waterproof underlayment and is most often installed under metal roofing.
Material costs by underlayment type are shown in the estimates below:
| Underlayment Type | Average Material-Only Price per Square in 2026 |
|---|---|
| Felt | $5–$55 |
| Synthetic | $18–$60 |
| Rubber | $50–$75 |
Prep work for underlayment installation includes removing your old roof and existing underlayment, which typically costs $1,000 to $5,000 and is usually bundled into your roofer's initial estimate. Once the old material is stripped, the new underlayment goes over the roof decking, and if that decking shows damage, you may face additional repair costs. New roof sheathing costs $2 to $5 per square foot for materials and labor combined.
The permit for a full roof replacement, which covers the underlayment work as well, typically costs $150 to $500. Most municipalities require a building permit to legally replace a roof, and while no permit exists specifically for underlayment, you will need one to install new roofing over it.
If you hire a roofing company near you for roof underlayment replacement, you'll spend around $1,400 to $3,800 on labor. Even though this rate accounts for 80% to 90% of the total project cost, it’s essential to hire a professional roofer.
The process is admittedly complicated and can come with several unfortunate consequences. For instance, improper underlayment installation can lead to costly roof leaks, water damage, and voided warranties.
Roof underlayment replacement involves dangerous work at heights and precise installation, so here's why you should hire a pro:
Professionals have the safety equipment and training to work on steep or high roofs safely.
Roofers can assess your roof decking for damage and make necessary repairs before installing new underlayment.
Roofers ensure the underlayment is installed correctly to prevent leaks, which can cost thousands in water damage.
Most roofing manufacturers require professional installation to maintain warranty coverage on your roofing materials.
Pros understand local building codes and permit requirements for roof replacement projects.
Contractors can coordinate the entire roof replacement efficiently, ensuring underlayment isn't left exposed to the elements.
Roofers have specialized tools for removing old roofing materials and installing underlayment properly around vents, chimneys, and valleys.
Licensed roofing companies carry insurance to protect against accidents or installation errors that could damage your home.
Roof underlayment replacement costs an average of $3,300, but most roofers include this in their roof replacement cost estimates. Roof underlayment repair is much more affordable and is often included in a total roof patch or leak repair. These services cost between $500 and $1,000, in most cases, with only a small fraction of that going toward underlayment repair.
Unless you’re dealing with a small leak and you know the rest of your roof has a lot of useful life left in it, it’s usually better to replace the underlayment and the roofing material above for the longest-lasting solution.
Roof underlayment replacement costs can climb up to around $8,200, but there are some things you can do to help keep costs down.
Choose the right material for your home. The three types of roof underlayment come with different material costs. You can save a few hundred dollars by choosing felt over synthetic or rubber underlayment, provided it’s a suitable option for your climate.
Consider a roof overlay. If you don’t have a history of roof leaks, you can opt to install new roofing over your existing roofing, which avoids the cost of roof underlayment replacement altogether. Speak with a professional roofer to see if this is an option.
Repair over replace when possible. If you just have a small leak, you can save thousands by having a professional patch it rather than replace the entire roof. Have a roof inspection done, or ask a pro beforehand if a patch would be a good option.
Hire a professional. Hiring a professional to install new roof underlayment will cost you significantly more than if you DIYed the work, but proper installation could save you even more money over time by avoiding property damage and expensive roof leaks.
Replacing your roof underlayment won’t add much, if anything, to your home value, but replacing an old roof along with the underlayment almost always will. Most homeowners see a return on investment ROI of between 50% and 70% on roof replacement because the project improves curb appeal, secures a lengthy warranty for the roof, and provides peace of mind for buyers who may otherwise worry about having to pay to replace the roof after closing.
Discuss with your roofer which underlayment material—felt, synthetic, or rubber—is best for your roof type, climate, and budget.
Measure your roof's square footage, or ask the roofer to measure it during the consultation to get an accurate estimate.
Ask whether your roof decking or sheathing needs inspection or repairs before installing new underlayment.
Confirm whether the contractor will handle permit applications for the roof replacement project, which typically cost $150 to $500.
Discuss the timeline for removing your old roof and installing the underlayment and new roofing material to minimize weather exposure.
Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We extensively research project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We rely on reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
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Mitchell and the crew were top tier i am so happy with my new roof
Home Genius ExteriorsD1 Roofing delivers outstanding service from beginning to end, backed by a strong warranty and expert teams. I highly recommend them for their excellence in meeting and surpassing expectations with unmatched communication. Choosing D1 Roofing was flawless decision
Division 1 Roofing LLCThis place took $25,000 for a flat roof job with a five-year warranty and never returned to fix the leaks that were caused by their work. These people are not professionals and should not be doing this type of work. They incorrectly changed the pitch of the roof, and caused more damage than...
The technician was very professional and friendly. He answered all my questions and was very thorough. He left the fireplace area very clean . He inspected from the roof and advised me as to other work that might need to be done. There was no pressure there. I was very satisfied with the...
Supreme brick & chimneyI am really impressed with their timeliness and turnaround. Mitchell came out, and we decided to move forward with their pricing. Our roof was on within a week, and we could not be happier with their team! Amazing company, great prices and honest, dependable craftsmanship. I highly recommend...
Window Depot USA of Central OhioManuel Calvillo is the best option in the area for roofing and you won't be disappointed.
They damaged multiple items on my property, including a marble slab used as a table top, tried to hide it, and refused to pay or replace. Arrived day one without a ladder to access roof & delayed a day. Left a mess in back yard; didn't wear face masks; no show by owner to property to see damages
Grants Tree ServiceI've hired Gary/Cherokee Roofing for two different homes, work quality, responsiveness, and completion have been great both times. And the prices quoted were very competitive. I would definitely hire again.
Lyle did a great job removing asbestos shingles from our front porch roof. They worked together with our roofer to make sure that the new roof was able to be installed on the same day that Lyle removed the asbestos shingles.
Lyle EnvironmentalBradley Builders did a good job replacing the roof on our front porch. They color-matched the existing shingles on the rest of the house and installed a metal ridge roll since we live in a historical neighborhood. They did the job while we were out of town. When we got back, everything was...
Bradley Builders, Inc.From average costs to expert advice, get all the answers you need to get your job done.
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