How much does it cost to replace roof underlayment will depend on many factors. Replacing the underlayment of the roof is one of the important tasks in roof maintenance. This plays the role of a shield for homes and makes sure your roof is not vulnerable to water leaks and damages. In this article, we would like to reveal the influence of specific components on the total cost of replacing underlayments on roofs to help you make the best decisions.
What is Underlayment?
Before we discuss how much does it cost to replace roof underlayment, let’s define underlayment first. Roof underlayment is the waterproof material that is installed below your rooftop or deck layer. This is embedded below your roofing material and cannot be seen once you have your roof complete. Installing underlayment on the roof provides a flat plane on which any selected roofing material will be placed. Even though some regions permit the installation of low-cost materials such as asphalt with no underlayment, most require it, and many building codes enshrine its use; in addition, all roofs are improved by its installation.
How Much Does It Cost to Replace Roof Underlayment?
The key elements affecting how much does it cost to replace roof underlayment include the materials used and the design of your roof. For instance, standard roofing space goes from 1,000 to 3,000 sq. ft., and you can choose anything starting with asphalt shingles and going up to aluminum, clay, or copper roofing. The cost to replace roof decking and shingles will also be accosted by material as well as the cost of the labor charge. Each type of material is handled differently in regards to its size, which is by the square foot, by the bundle, and by roofing square which is a 10 by 10 slab.
If you’re considering roof replacement underlayment, it’s essential to work with a trusted and experienced roofing contractor, like Quality Allied Roofing. We will help you figure out exactly how much does it cost to replace roof underlayment according to your situation.
How do I know if my roof underlayment is bad?
Several signs indicate the need for underlayment replacement:
- Missing or Damaged Tiles
- Water Damage Inside Your Home
- Aging Underlayment
- Damaged Soffits, Fascia, or Gutters
If you discover any of these signs, you have to look for how to replace underlayment on tile roof or contact Quality Allied Roofing & Remodeling.
How to Choose the Right Roof Underlayment
The selection of the right underlayment depends on various aspects such as climatic conditions around, durability, and compatibility with the roof’s material. The least expensive one is felt underlayment, but the least durable, and rubberized asphalt is the most expensive, but it is waterproofing. Synthetic underlayment is a good tear-resistance and is relatively cheaper thus a good one for use with metal roofs. It is crucial to consult the prevailing building codes in your region to confirm the compatibility of the selected underlayment.
If you have a tile roof, you can learn more about its replacement process with how do you replace a roof tile.

Roof Underlayment Replacement Cost Factors
To learn how much does it cost to replace roof underlayment, you will need to learn the factors affecting the price first. It is crucial to emphasize that numerous aspects may affect the overall costs when choosing the roof underlayment material to be substituted. Here are the key tile roof underlayment replacement cost factors:
Roof Underlayment Cost per Square Foot
The roof underlayment cost per square foot depending on the type of underlayment used by the contractor usually falls between $0.50 to $4.00. For example how much does it cost to replace a tile roof on a 2,200 square-foot house differs according to the type of tile replacement, such as Clay tile roofs costs range from $34,100 to $74,800, Concrete tile roofs range from $29,700 to $61,600, while Slate tile roof cost range from $45,100 to $101,200. Another example how much does it cost to replace a tile roof on a $2,500 square-foot house. Also depending on the type of tile roof, clay tile roof costs range from $38,750 to $85,000, concrete tile roofs range from $33,750 to $70,000, and slate tile roofs range from $51,250 to $115,000.
Roof Underlayment Cost by Material
The other 40% to 50% of how much to replace underlayment on tile roof totally goes toward materials. An itemized list breaks down to the roofing material—shingles, shakes, tiles, etc—as well as the underlayment, new flashing, roof ridges, and vents. The cost of building supplies such as nails, tools, ladders, and other related equipment also contributes to the final price.
Roof Underlayment Cost by Weight
How much does it cost to replace roof underlayment is also dependent on its weight, especially to asphalt-saturated felt that comes with varying densities. 15-pound felt cost ranges from $0.15 to $0.25 per square foot. This usually costs less but is not as sturdy or as long-lasting as the other one.
30-pound felt cost ranges from $0. 25 to $0. 40 per square foot. As compared to a 15-pound felt, it is thicker and heavier and provides much better protection for valuable possessions along with durability.
You can also learn more about how much does it cost to replace a flat felt roof by contacting Quality Allied.
Roof Underlayment Cost by Brand
How much does it cost to replace roof underlayment, may also differ in brand and type Since roof underlayment can greatly affect protection through increments of weather conditions, decisions should be made carefully. Here are some common brands and their typical price ranges:
Asphalt-Saturated Felt:
- GAF: 15-pound felt cost $0. 15 – $0. 25 per square foot. 30-pound felt cost $0. 25 – $0. 40 per square foot.
- CertainTeed: 15-pound felt costs $0. 18 – $0. 28 per square foot and the 30-pound felt cost $0. 28 – $0. 45 per square foot.
Synthetic Underlayment:
- Tyvek costs $0. 20 – $0. 50 per square foot.
- RhinoRoof costs $0. 25 – $0. 55 per square foot.
- GAF Deck-Armor costs $0. 30 – $0. 60 per square foot.
Rubberized Asphalt Underlayment:
- Grace Ice & Water Shield costs $0. 50 – $1. 00 per square foot
- Henry Blueskin costs $0. 60 – $1. 20 per square foot
These roof underlayments cost per square foot depending on the certain product range, geographic location, and the quantity that is purchased.
How much does labor cost to replace roof?
It is hard to come up with an approximate labor price on how much does it cost to replace roof underlayment because this will depend on several things such as the size and shape of the roof, the kind of underlayment used, and the location of the house. The average price of installing underlayment on roof per square foot ranges from $0.15 to $3.50. In this case, it is recommended to ask for estimates from experienced roofing contractors like Quality Allied Roofing and Remodelling.
If you need to replace your whole roof not just the underlayment, you can check out how much does it cost to change a roof.

Roof Underlayment Replacement Cost by Roof Type
Replacing roof underlay is not cheap, and this depends on the type of roof you have in your home. Various kinds of roofs are there with their own advantages and disadvantages that affect how much does it cost to replace roof underlayment. Here’s a breakdown of the price to replace roof decking and shingles by roof type:
- Asphalt Shingle Roofs cost range a wide range is given but the AMS guidelines suggest a range of $1,000- $4,000.
- Metal Roofs’ cost range corresponds approximately to the $2000 – $5000 range.
- The best underlayment for tile roof cost range from $2500 to $7500.
- Wood Shake Roofs cost range from $3,000 – $8,000.
- Flat Roofs cost range $2,000 – $6,000.
- Slate Roofs cost range $3,500 – $10,000.
Understanding the cost of replacing underlayment on tile roof variations helps homeowners budget more effectively for roof underlayment replacement. Quality Allied Roofing and Remodeling is committed to providing expert guidance and top-tier service for all your roofing needs. We will help you determine the cost to replace roof in Texas and discover your roofing requirements based on your situation.
How to Reduce the Cost of Replacing Roof Underlayment
How much does it cost to replace roof underlayment can be a significant expense, but there are several strategies to save money from roof underlayment cost per square foot without compromising quality:
- Choose cheap but durable and efficient underlayment.
- Obtain quotes from different reputable roofing contractors.
- It is often considered that roofing work costs more during certain periods or in certain months of the year.
- If you are okay with doing some work yourself, then you might want to rip off the old underlayment.
By carefully planning and taking advantage of these how much does it cost to replace roof underlayment saving strategies, you can reduce the expense of installing roof underlayment while ensuring your roof remains in good condition.

Getting Estimates from Roofing Contractors
When seeking estimates from roofing contractors like Quality Allied Roofing and Remodelling, follow these steps to ensure you get accurate and comprehensive quotes:
- First of all, it is necessary to collect information about the roofing company.
- Make sure you choose a company that aligns with your requirements.
- State very precisely your expectations.
- Ask for detailed quotes.
By doing so you will be able to get detailed and competitive bids from Quality Allied Roofing as well as other contractors through which you will be in a position to make an informed decision on your roof underlayment replacement cost.
Should you replace roof before selling house and need your underlayment changed, reach out to us!
Conclusion
Replacing roof underlayment is a vital investment in the health and longevity of your home. While how much does it cost to replace roof underlayment can vary based on material choices, roof complexity, labor, and other factors, understanding these elements helps in making informed decisions. Quality Allied Roofing focuses on choosing quality materials and skilled professionals to ensure a perfect way of how to replace underlayment on tile roof. By carefully considering the factors outlined in this article, homeowners can ensure they receive the best value for their investment, ultimately providing long-term protection and peace of mind for their property.