The subfloor is an essential component of any building structure. It serves as the foundation for your flooring, supporting its weight and allowing you to walk on it without worry.
Over time, however, subfloors can become damaged or deteriorate due to moisture, pests, or general wear and tear. When this happens, it may be necessary to replace the subfloor entirely.
But what exactly does that entail? And how much can you expect to pay for a subfloor replacement?
In this article, we’ll explore these questions in detail. We’ll discuss what factors contribute to the cost of replacing a subfloor and provide some ballpark figures so that you know what to expect when budgeting for this renovation project.
Whether you’re dealing with water damage or simply want to update your home’s flooring foundation, understanding the cost of a subfloor replacement is crucial. So let’s dive in!
Understanding Subflooring
Subflooring is the layer of material that sits directly on top of the floor joists and supports the finished flooring. It’s an essential component of any flooring project, providing stability and ensuring that your carpet, tile, or hardwood floors are level and secure.
There are several types of subflooring materials available, including plywood, oriented strand board (OSB), particleboard, and concrete. Each has its benefits and drawbacks depending on factors such as cost, durability, moisture resistance, and ease of installation.
Plywood is a popular choice for subfloors because it’s strong yet lightweight. It also resists warping and cracking better than other materials when exposed to changes in temperature or humidity. However, it can be more expensive than some alternatives like OSB.
OSB is another common type of subflooring material made from wood chips glued together into large mats. It’s generally less expensive than plywood but not quite as durable. It may also absorb moisture more readily if not properly sealed.
Particleboard is a low-cost option that consists of compressed wood particles held together with adhesives. While easy to install due to its light weight and uniform thickness, particleboard tends to swell when exposed to water or humidity over time.
Finally, concrete subfloors offer superior strength and durability but are often reserved for commercial buildings or basements due to their high cost compared to other materials.
When considering how much it will cost to replace your subflooring material during a renovation project or repair work caused by water damage or termites must be taken into consideration along with labor costs based upon local rates charged per hour by contractors in your area along with specific job requirements like size & complexity etcetera; however typically replacing 100 square feet would take around $500-$800 while smaller areas could see prices closer towards $300-400 range.
Factors Affecting Subfloor Replacement Costs
Replacing a subfloor can be quite an expensive undertaking, and the cost to replace a subfloor can vary depending on several factors. Here are some of the main factors that affect subfloor replacement costs:
Type of Subfloor Material:
One of the most significant factors affecting subfloor replacement costs is the type of material used for your existing subfloors. Plywood and oriented strand board (OSB) are two popular types of subfloors used in modern construction projects, while older homes may have solid wood or even concrete as their flooring base. Replacing a plywood or OSB floor will generally cost less than replacing solid wood, but concrete floors tend to be the most expensive.
Extent of Damage:
The extent of damage to your existing subfloors will also play a role in determining replacement costs. If only small areas need repair or patching, this process may not be too expensive. However, if there is extensive water damage or rot throughout much of your existing flooring system, you may need to replace large portions if not all parts of it.
Square Footage:
Another primary factor that influences how much you’ll pay for new flooring materials and installation is square footage. The more space you need to cover with new boards or other materials like underlayment or adhesive, the higher your overall costs will likely be.
Labor Costs:
The final factor influencing subfloor replacement expenses is labor costs in terms both time needed for skilled workers and hourly rates they charge per person involved with doing such job.This might include everything from removing old planks from joists down through any necessary prep work before laying down new ones; installing finish layer etc., meaning that increases in size increase their fee accordingly.
In conclusion:
Several different variables influence how much it will cost to replace your subfloor. These can include the type of materials used, extent of damage present on existing floors, square footage needed for new installations and labor costs associated with hiring trained professionals who specialize in this kind of work. By considering all these factors together and coming up with a plan that makes sense for your particular situation, you’ll be able to get a better idea about what replacing your subfloors might actually cost.
Types of Subflooring and Their Costs
If you’re looking to replace your old subfloor, it’s important to know what type of subflooring works best for your project. Here are some common types of subfloor and their estimated costs per square foot.
Plywood Subfloors: Plywood is one of the most popular options for subflooring due to its durability and affordability. The cost for plywood can range from $0.50 to $3 per square foot depending on the thickness and grade.
OSB (Oriented Strand Board) Subfloors: Another popular option, OSB is a composite material made from wood chips that have been glued together in layers. The cost for OSB can range from $0.60 to $1 per square foot.
Cementitious Backer Board: Cementitious backer board is ideal for areas with high moisture levels such as bathrooms or kitchens because it resists water damage. However, this material is more expensive than other options, costing around $4 per square foot.
Gypsum Concrete: Gypsum concrete is another great option for moisture-prone areas as it has excellent water resistance properties which make it suitable for use below vinyl flooring or over radiant heating panels. It comes at an average cost of around $5 per square foot.
Tongue-and-Groove Subfloors: Tongue-and-groove installation offers a tight fit between planks making them more stable underfoot compared to traditional plywood sheets which may move slightly over time due to seasonal changes in humidity levels. The cost ranges from about $.90-$1/square ft
Choosing the right type of subfloor will depend on various factors such as budget, location, level of moisture exposure among others but remember; always prioritize quality over anything else if you want your new subfloor to last for many years.
Calculating the Cost of Subfloor Replacement
Replacing a subfloor can be a significant expense, but it is essential to ensure the structural integrity of your home. The cost of replacing a subfloor depends on various factors such as the size and type of material used for replacement.
Size: The cost to replace a subfloor depends heavily on its size. If you have a small room with minimal damage, it will likely cost less than replacing an entire floor in your home.
Type of Material: Another factor that affects the overall cost is the type of material used for replacement. Plywood is the most commonly used material for subfloors, and it may range in thickness from 1/4 inch up to 3/4 inch or thicker depending on your needs. However, if you prefer utilizing other materials such as tile or concrete backer board, expect higher costs than plywood.
Labor Costs: Labor costs are also important factors when calculating total expenses for any project. It’s recommended that you hire professionals who are experienced in removing old flooring and installing new ones properly because they will do quality work more efficiently which ensures longevity without damaging surrounding areas like walls or baseboards during installation process.
The average price range for labor only is between $40-$80 per hour plus additional charges based on specific job requirements such as:
– Removing old flooring
– Installing new floors
– Removal & disposal
It’s highly recommended that homeowners get several quotes from different contractors before making a final decision about who will handle their project; this allows comparing prices and services offered by each professional.
In conclusion, calculating costs regarding replacing a subfloor involves many variables including dimensions, materials required (such as plywood), labor needed (including removal/disposal), and payment methods chosen by homeowners themselves. To avoid overpaying unnecessarily while ensuring quality workmanship at fair market rates; it’s recommended to conduct thorough research, compare quotes from multiple professionals, and read online reviews before selecting the right contractor for your project.
Hiring a Professional vs DIY
When it comes to replacing subfloors, homeowners are faced with the decision of whether to hire a professional or tackle the project themselves. While DIY projects can be fun and rewarding, some tasks require special skills and equipment that only professionals possess.
Replacing a subfloor involves more than just removing the old floor covering and laying down new plywood. A thorough inspection of the joists and supports underneath is necessary to ensure they are still in good condition. Any damaged areas must be repaired before installing the new subfloor.
Professionals have experience in identifying potential problems early on, which saves you from costly repairs down the road. They also have access to specialized equipment such as moisture meters that detect water damage beyond what is visible on the surface.
Another advantage of hiring professionals is their ability to complete projects quickly without sacrificing quality. A team of workers can finish a subfloor replacement job in half the time it would take an inexperienced homeowner working alone.
However, hiring professionals does come at a higher cost than doing it yourself. The price will depend on factors such as location, size of area needing repair, materials used, and labor rates charged by contractors.
DIY enthusiasts may choose to replace their own subfloors for various reasons including saving money or having control over every aspect of renovation projects. However, this option should only be considered if you possess adequate skills in carpentry and construction work.
If you decide to go through with replacing your own subflooring system, make sure you have all necessary tools beforehand like circular saws or reciprocating saws for cutting out damaged sections; hammers; chisels; pry bars etcetera needed while performing this task properly without damaging other structural components underfoot!
In summary: Replacing a Subflooring System can either be done as DIY project or by hiring experts depending on how much skill one has got enough experience handling such tasks; costs tend to be higher when hiring experts, but the project gets done quicker with less hassle.
Conclusion and Final Thoughts
In conclusion, the cost to replace a subfloor can vary greatly depending on several factors. The size of the room or area, the type of flooring material that needs to be removed and replaced, and any additional repairs needed all play a role in determining the final cost.
It is important to note that replacing a subfloor is not typically a DIY project. Hiring a professional contractor who has experience with this type of work is crucial for ensuring proper installation and avoiding any potential safety hazards.
While it may seem like an expensive undertaking, investing in high-quality materials and hiring skilled professionals can ultimately save you money in the long run by preventing future damage or issues with your flooring.
When considering replacing your subfloor, it is also important to take into account any underlying issues such as water damage or mold growth. These issues must be addressed before installing new flooring to prevent further damage down the line.
Overall, while replacing a subfloor can be costly and time-consuming, it is an essential step in maintaining the integrity of your home’s foundation. By taking care of these repairs promptly and properly, you can ensure that your floors remain strong and secure for years to come.

Ben is one of the founders and editor of Structured Living HUB. His interests are automotive and architecture. For over 10 years he worked as a modular house contractor in the United States.