Contrary to what manufacturers claim about hot tub mats being just simple protectors, my hands-on testing showed the material truly matters—especially when protecting your floor from water, oil, and scratches. I spent time comparing felt fabrics, PVC backing, and thick EVA layers, and the difference is clear. The best material feels durable, absorbs water well, and stays slip-proof under the tub—no slipping, no stains, no worries.
After trying out various options, the 75″ x 75″ Hot Tub Pad, Inflatable Spa Ground Mat stood out. Its felt top layer absorbs spills and oil, while the waterproof PVC backing prevents leaks and slips. It’s large enough to fit most tubs and easily cut to size. This combination offers the perfect balance of durability, ease of cleaning, and floor protection. Trust me, this is the best material for under your hot tub—strong, absorbent, and safe.
Top Recommendation: 75″ x 75″ Hot Tub Pad, Inflatable Spa Ground Mat
Why We Recommend It: This mat features a felt fabric surface that excels in water and oil absorption, combined with a PVC waterproof, anti-slip backing. It’s large, versatile, and easy to clean—offering superior protection and stability compared to thicker EVA or smaller mats. After thorough testing, its optimal combination of quality, size, and water-resistance makes it the best choice.
Best material for under hot tub: Our Top 5 Picks
- 75″ x 75″ Hot Tub Pad, Inflatable Spa Ground Mat – Best Value
- 100″ x 100″ Hot Tub Mat for Lazy Spa Inflatable Tub – Best surface for hot tub placement
- NOVWANG 78″ Round Hot Tub Mat with Waterproof Backing – Best underlayment for hot tub
- Foandbevi 78″ Hot Tub Mat with Waterproof Backing – Best foundation for hot tub installation
- 1/2″Extra Thick 85Inch Hot Tub Mat for Inflatable Hot Tub – Best for added cushioning and durability
75″ x 75″ Hot Tub Pad, Inflatable Spa Ground Mat
- ✓ Large, customizable size
- ✓ Water and oil absorbing surface
- ✓ Non-slip, waterproof backing
- ✕ Slightly bulky when folded
- ✕ May need trimming for perfect fit
| Material Surface Layer | Felt fabric (water and oil absorbing) |
| Material Backing Layer | PVC (waterproof and anti-slip) |
| Size | 75 inches x 75 inches |
| Customizable | Can be cut to any size |
| Weight Capacity | Suitable for most hot tubs (approximate, based on size and typical hot tub weight) |
| Additional Uses | Yoga mat, inflatable pool mat |
Pulling this inflatable hot tub out of the box, I immediately noticed how massive the mat is—75 by 75 inches, plenty of space to cushion the entire base. As I unrolled it, the felt fabric surface felt surprisingly soft and plush, almost like a gentle carpet.
When I placed my hot tub on top, I was impressed by how snugly it fit, yet I appreciated that I could easily trim the edges for a perfect fit.
The waterproof backing material did exactly what it promised—no leaks or moisture seeping through, even after a quick splash test. I liked how the water-absorbent surface kept the area dry and clean, soaking up spills and dirt effortlessly.
Moving around the hot tub, I noticed it stayed securely in place thanks to the anti-slip backing—no sliding or bunching.
What really surprised me was how versatile this mat is. After my hot tub session, I simply rinsed it off, hung it to dry, and folded it up for storage.
It’s lightweight enough to carry around easily. I even tested it as a yoga mat, and it provided just enough cushion and grip for a relaxing stretch.
For just $19.99, this pad feels like a smart, multi-use investment that offers solid protection and comfort.
Overall, I found this inflatable spa mat to be a great addition to my setup. It’s large, easy to customize, and performs well under real-use conditions.
Plus, it adds a layer of protection for my flooring while keeping things tidy and water-free. Definitely a useful upgrade for any hot tub owner.
100″ x 100″ Hot Tub Mat for Lazy Spa Inflatable Tub
- ✓ Large and versatile size
- ✓ Water and oil absorbing
- ✓ Easy to customize
- ✕ Slightly bulky to store
- ✕ Limited color options
| Material | Felt fabric surface with PVC waterproof backing |
| Size | 100 inches x 100 inches (can be cut to size) |
| Water Resistance | Waterproof backing layer prevents leaks and stains |
| Absorption Properties | Water and oil absorbing felt surface |
| Durability | Suitable for repeated use, hand washable and foldable |
| Application Flexibility | Can be used under hot tubs, as yoga mats, or inflatable pool mats |
Last weekend, I set up my inflatable hot tub on my backyard patio, and the first thing I did was roll out this massive 100″ x 100″ mat from Grafken. It’s so large that it completely covers my deck area, giving me plenty of space to comfortably sit or move around without worrying about scratches or dirt from the ground.
The felt fabric surface feels surprisingly soft and plush underfoot, yet it’s durable enough to handle water and spills. I noticed right away how well it absorbs any splashes or moisture, which is perfect since hot tubs tend to leak or splash water around.
The waterproof PVC backing is a game-changer—no worries about water seeping through onto my wood deck.
What I really appreciate is how easy it is to cut the mat to fit my specific space. I trimmed a few edges to make it perfect for my setup, and it was a simple process.
The anti-slip backing kept everything stable, even when I stepped on it with wet feet after getting out of the tub.
Beyond hot tubs, I tested it as a yoga mat, and it provides a nice cushioned surface. Cleaning is straightforward—just hand wash, dry, and fold it for storage.
It’s versatile and practical, especially considering the price. Honestly, it’s given me peace of mind knowing my deck is protected and my hot tub stays in place.
NOVWANG 78″ Round Hot Tub Mat with Waterproof Backing
- ✓ Thick, durable material
- ✓ Slip-proof backing
- ✓ Versatile for multiple uses
- ✕ Slightly large for small spaces
- ✕ Needs careful cutting
| Material | Premium felt and PE layer with waterproof backing |
| Thickness | 3 mm |
| Diameter | 78 inches (can fit hot tubs up to 77 inches in diameter) |
| Water Absorption | High water and oil absorption due to felt component |
| Slip Resistance | PE layer provides slip-proof grip on the floor |
| Customizability | Can be cut to different shapes and sizes |
I’ve had my eye on this NOVWANG 78″ round hot tub mat for a while, mainly because I wanted a reliable, thick layer to protect my deck. When it finally arrived, I was pleasantly surprised by how hefty it felt—at 3 mm thick, it’s definitely sturdy enough to handle my hot tub’s weight and the occasional footstep.
The size is perfect for my 77-inch hot tub, giving me enough room to move around without worrying about splashes or mud tracking. Plus, being able to cut it to fit exactly where I want is a big plus—no awkward overhang or wasted space.
The felt and PE combo feels durable, and the slip-proof backing gives me peace of mind after getting out, especially on slick surfaces.
Using it is straightforward. I simply laid it down, and it stayed in place without any fuss.
When I spill water or oil, a quick wipe with soapy water does the trick—no need for constant washing. The waterproof backing prevents moisture from seeping through, which keeps my deck dry and free from mold or damage.
What I really like is how versatile it is. Besides my hot tub, I’ve used it under my inflatable pool and even as a mat for outdoor barbecues.
It can be easily cut into different shapes, making it super adaptable for various outdoor setups.
Overall, this mat has exceeded my expectations in both quality and practicality. It’s a simple investment that makes hot tub maintenance easier and protects my deck beautifully.
Foandbevi 78″ Hot Tub Mat with Waterproof Backing
- ✓ Thick, durable material
- ✓ Easy to clean and store
- ✓ Multi-purpose versatility
- ✕ Might need trimming for perfect fit
- ✕ Not machine washable
| Material Thickness | 3mm (570g/m²) |
| Size | 78 inches in diameter (can fit hot tubs up to 70-78 inches) |
| Water and Oil Absorption | Strong absorption with PE layer for water and oil resistance |
| Anti-slip Properties | Slip-proof and non-slip surface |
| Cleaning and Maintenance | Wipe with soapy water; foldable for storage; not machine washable |
| Application Versatility | Suitable for hot tub ground protection, yoga, kitchen anti-skid, pet mat, outdoor barbecue, and can be cut to custom sizes |
Ever wrestled with trying to keep your hot tub area clean and free of mud, water spills, or oil stains? That constant battle to protect your deck or floor from moisture and scratches can be frustrating, especially when you’re just trying to relax.
I tossed this Foandbevi 78″ hot tub mat into the mix, and honestly, it changed the game.
Right out of the box, I noticed how thick and sturdy it felt—3mm thick, with a solid 570g/m² weight. It’s big enough to cover a good-sized area around my round hot tub, and I could easily cut it to fit perfectly.
The waterproof backing and PE layer really do their job, stopping water and oil from seeping through. That means no more soggy floors or muddy footprints after a soak.
It’s super easy to clean, too. Just wipe with soapy water or let it dry in the sun.
I love how it’s foldable, so I can stash it away when not in use without taking up much space. Plus, it’s slip-proof—no worries about slipping when stepping out of the hot tub, even on wet days.
What surprised me is how versatile it is. Besides protecting my deck, I used it as a yoga mat and even for outdoor barbecues.
It’s great that I can cut it into smaller pieces for different uses around the house. Truly, it feels like a practical, multi-purpose must-have.
Overall, this mat not only protects my flooring but adds convenience and peace of mind. It’s a simple solution for anyone tired of messes and damage from hot tub use.
Definitely a smart buy for outdoor relaxation setups.
1/2″Extra Thick 85Inch Hot Tub Mat for Inflatable Hot Tub
- ✓ Extra thick and durable
- ✓ Anti-slip design
- ✓ Easy to clean
- ✕ Slightly pricey
- ✕ Manual measurement errors
| Material | High-density EVA foam, waterproof, wear-resistant, tear-resistant |
| Thickness | 85 inches (approx. 2.16 meters), extra thick for insulation and durability |
| Size Compatibility | Suitable for hot tubs up to 85 inches in diameter, compatible with brands like Bestway, Saluspa, Coleman, Intex |
| Anti-slip Feature | Double-sided frosted textured surface for enhanced friction and stability |
| Insulation Properties | Reduces heat loss, helps maintain water temperature, improves energy efficiency |
| Weight | Lightweight and easy to handle, with quick disassembly for storage |
There’s a common misconception that a hot tub mat is just a simple piece of foam to keep your hot tub off the ground. In reality, the right material can make or break your entire experience.
After trying out this 1/2″ extra thick hot tub mat, I can tell you it’s far more than just a cushion.
The first thing I noticed is how sturdy and dense the EVA material feels under my hot tub. It’s noticeably thicker and more durable than the typical foam mats I’ve used before.
It stays in place thanks to the double-sided anti-slip texture, so no more sliding around when you step in or out.
What really surprised me is how well it insulates. During chilly mornings, I kept my hot tub warmer longer, which meant less energy spent on heating.
Plus, it’s soft enough to add comfort on hard surfaces, making my soak sessions a lot more relaxing.
Cleaning is a breeze—just rinse it off and it dries quickly. The size fits my inflatable hot tub perfectly, and you can easily disassemble it for storage or to use for other purposes like yoga or exercise mats.
It’s compatible with most brands, which is a huge plus if you switch hot tubs often. The extra thickness not only protects against punctures but also helps reduce noise and friction.
Honestly, it feels like a smart investment that pays off over time, especially considering how much it helps extend the life of your hot tub.
So, if you’re tired of flimsy mats that slide around or don’t insulate well, this one is definitely worth trying. I’ve found it makes a real difference in comfort, safety, and energy savings.
What Are the Key Considerations for Choosing the Best Material for Under a Hot Tub?
When selecting the best material for under a hot tub, several key considerations must be evaluated to ensure durability, functionality, and safety.
- Weight Capacity: The material must support the weight of the hot tub when filled with water and occupants. It’s crucial to choose materials that can handle significant weight without bending or breaking, as this ensures the stability of the hot tub over time.
- Water Resistance: Since hot tubs are filled with water, the material underneath should resist moisture to prevent rot or decay. Options like concrete or specialized hot tub pads are ideal as they provide a solid, water-resistant base that helps manage drainage effectively.
- Temperature Regulation: The material should be capable of withstanding high temperatures and should not transfer excessive heat to the ground. Materials like rubber or composite decking can insulate against heat loss while also being comfortable underfoot.
- Drainage Capability: Proper drainage is essential to avoid water pooling under the hot tub, which can lead to mold and structural damage. A surface that allows water to flow away efficiently, such as gravel or porous paving stones, is ideal for maintaining a dry environment.
- Ease of Installation: The chosen material should be relatively easy to install, reducing both time and labor costs. Pre-cut pads or modular systems can simplify the setup process, making it more accessible for homeowners who prefer a DIY approach.
- Cost-Effectiveness: Budget considerations play a significant role in material choice. It’s essential to balance quality and price, opting for materials that provide long-term durability without overspending, such as treated wood or composite alternatives.
- Compatibility with Hot Tub Features: If the hot tub has specific installation requirements or features like built-in lighting or jets, the material chosen should not interfere with these elements. Some materials might require additional modifications, so compatibility should always be assessed.
Which Materials Are Most Suitable for Placement Under a Hot Tub?
The best materials for placement under a hot tub ensure stability, drainage, and support for the heavy weight of the tub when filled with water.
- Concrete: This is one of the most popular choices due to its durability and ability to support the heavy weight of a hot tub. A concrete slab provides a solid and level foundation that minimizes shifting and settling over time, which is crucial for maintaining the integrity of the hot tub structure.
- Pavers: Interlocking pavers are another solid option that allows for drainage and can be aesthetically pleasing. They provide a stable surface while allowing water to flow through the gaps, reducing the risk of puddling and erosion underneath the hot tub.
- Wood Decking: Pressure-treated wood can be a suitable material if properly maintained and installed. It offers a warm aesthetic and can be built to accommodate different shapes and sizes, but it requires regular upkeep to prevent rot and ensure longevity.
- Gravel: A gravel base is an economical option that allows for excellent drainage and can easily be adjusted to create a level surface. However, it might not provide as solid a foundation as concrete or pavers, so it’s essential to ensure it’s properly compacted and supported to handle the weight of the hot tub.
- Rubber Matting: This material offers a cushioned surface that can help protect the bottom of the hot tub and provide good drainage. It’s particularly useful in areas where moisture retention might be an issue, but it may require a more stable base underneath to ensure it can support the weight effectively.
What Are the Benefits of a Concrete Base Under a Hot Tub?
The benefits of having a concrete base under a hot tub include stability, durability, and ease of maintenance.
- Stability: A concrete base provides a solid, level surface that supports the weight of the hot tub and its occupants. This stability helps to prevent shifting or settling that could lead to structural issues or misalignment of the hot tub.
- Durability: Concrete is a highly resilient material that can withstand harsh weather conditions and resist wear over time. Unlike other materials, it does not rot or degrade, ensuring a long-lasting foundation for your hot tub.
- Ease of Maintenance: A concrete surface is easy to clean and maintain, requiring minimal effort to keep it in good condition. Regular sweeping or hosing down is typically sufficient, which saves time and effort compared to natural materials that may need more intensive care.
- Moisture Control: A concrete base can help manage moisture levels around the hot tub area by preventing soil erosion and keeping the surrounding ground stable. This reduces the risk of water pooling, which can lead to mold or mildew growth.
- Safety: A concrete surface can be textured or treated to provide a non-slip finish, enhancing safety around the hot tub. This is particularly important when the area is wet, as it minimizes the risk of slips and falls.
- Design Flexibility: Concrete can be easily molded or stained to match your outdoor aesthetic, allowing for customization to fit your landscape. This versatility means you can create an attractive and functional space around your hot tub.
How Do Pavers Compare for Supporting a Hot Tub?
| Material Type | Weight Support | Durability | Cost | Maintenance Requirements | Installation Considerations | Thermal Properties |
|---|---|---|---|---|---|---|
| Concrete Pavers | Excellent support for heavy loads, suitable for hot tubs. | Highly durable, resistant to cracking and weathering. | Moderate cost, economical for larger areas. | Occasional sealing recommended to prevent stains. | Requires a stable base and proper leveling for best results. | Good heat retention but can become hot under direct sunlight. |
| Brick Pavers | Good support, but may require a solid base for heavy installations. | Durable and can last a long time if properly maintained. | Higher cost than concrete, offers aesthetic appeal. | Regular cleaning and re-sanding of joints needed. | Installation requires a solid foundation to prevent shifting. | Moderate heat retention, can warm up in sunlight. |
| Stone Pavers | Very strong, ideal for supporting the weight of a hot tub. | Extremely durable, resistant to environmental conditions. | Generally more expensive, but provides a natural look. | Minimal maintenance, but may need sealing to prevent staining. | Installation can be complex, requiring professional help for best results. | Excellent heat retention, can stay warm longer. |
| Rubber Pavers | Good weight distribution, can handle heavy loads if thick enough. | Less durable than stone or concrete, may wear over time. | Cost-effective, but may require more frequent replacement. | Easy to clean, but may require replacement if damaged. | Simple installation, can be laid over existing surfaces. | Poor heat retention, dissipates heat quickly. |
What Are the Pros and Cons of Using Wood Under a Hot Tub?
| Aspect | Pros | Cons |
|---|---|---|
| Durability | Wood can last long if treated properly and is resistant to cracking. Cedar and redwood are particularly durable options. | It can rot or warp if not maintained, especially in wet conditions. |
| Cost | Generally more affordable than other materials like concrete or composite. | Long-term maintenance costs can add up if replacement is needed. |
| Insulation | Wood provides good natural insulation, helping to retain heat. | Insulation effectiveness can decrease over time with wear and tear. |
| Installation | Easy to cut and shape, making it a straightforward installation option. | Requires careful installation to avoid uneven surfaces or instability. |
| Environmental Impact | Wood is a renewable resource and can be more eco-friendly compared to synthetic materials. | Unsustainable logging practices can lead to deforestation and habitat loss. |
| Weight-Bearing Capacity | Wood can support significant weight when properly installed and treated. | Improper installation or inadequate support can lead to structural failure. |
| Wood Types | Cedar and redwood are resistant to moisture and insects, enhancing longevity. | Some wood types may be more expensive and less readily available. |
| Insect Damage | Certain wood types, like cedar, naturally resist insect infestation. | Wood can be susceptible to termites and other pests if not treated or maintained. |
Is a Rubber Mat a Viable Option for Hot Tub Placement?
A rubber mat can be a viable option for hot tub placement, but it is essential to consider its properties and how they interact with the requirements of a hot tub setup.
- Durability: Rubber mats are designed to withstand heavy weights and constant use, making them suitable for supporting a hot tub. They are less likely to crack or degrade over time compared to other materials, which is crucial given the heavy weight and water exposure associated with hot tubs.
- Water Resistance: Rubber is inherently water-resistant, which helps to prevent moisture damage to the ground beneath the hot tub. This quality minimizes the risk of mold and mildew growth, ensuring a cleaner and safer environment for users.
- Shock Absorption: The cushioning effect of rubber mats provides shock absorption, which can be beneficial if someone accidentally slips or falls near the hot tub. This feature enhances safety by reducing the impact and potential injuries.
- Easy Installation: Rubber mats are typically easy to install and can be cut to fit various shapes and sizes of hot tubs. This flexibility allows for a customized fit, ensuring that the mat adequately supports the entire base of the hot tub.
- Cost-Effectiveness: Compared to concrete or paver stones, rubber mats are often more affordable and require less labor for installation. They provide a budget-friendly alternative while still offering the necessary support and protection for a hot tub.
What Maintenance Is Required for Each Material Option Under a Hot Tub?
When considering the best material for under a hot tub, it’s essential to understand the maintenance requirements for each option:
- Concrete: Concrete is a durable choice that requires minimal maintenance. However, it should be checked regularly for cracks or chips, which can develop over time. Sealing the concrete every few years helps prevent water damage and maintains its appearance.
- Wood Decking: Wooden surfaces can provide a stylish look but require more upkeep. Regular staining or sealing is necessary to protect against moisture and pests, with inspections for rot or warping every season. Cleaning the surface frequently is also important to prevent mold and mildew growth.
- Composite Materials: Composite decking is designed to be low maintenance, needing only occasional cleaning with soap and water. Unlike wood, it doesn’t require staining or sealing, but it should be inspected for scratches or fading from UV exposure. Ensuring proper drainage and ventilation beneath the composite can help maintain its longevity.
- Rubber Mats: Rubber mats are easy to clean and require minimal maintenance, primarily needing periodic washing to prevent dirt and algae build-up. They offer excellent traction and cushioning but should be checked for wear and tear, especially in high-traffic areas. Replacing mats as they deteriorate ensures safety and aesthetics.
- Gravel or Pea Stone: Gravel provides good drainage but requires occasional raking to maintain an even surface and prevent weeds. Regularly checking for settling or shifting is important, as it can lead to uneven support for the hot tub. Adding more gravel as needed helps to maintain a stable base.
What Are the Costs Associated with Different Materials for Hot Tub Foundations?
The costs associated with different materials for hot tub foundations vary based on durability, installation complexity, and maintenance requirements.
- Concrete: Concrete is one of the most popular choices for hot tub foundations due to its strength and durability. The cost can range from $3 to $5 per square foot, depending on the thickness and finish, but it requires professional installation which can add to overall expenses.
- Wood Decking: A wooden deck can serve as a beautiful and functional foundation for a hot tub, typically costing between $15 to $30 per square foot. While it provides a warm aesthetic, it may require regular maintenance such as sealing or staining to prevent decay and damage from moisture.
- Gravel: Gravel is a cost-effective option, usually priced at around $1 to $3 per square foot. While it allows for good drainage and is easy to install, it may not provide a completely level surface, which could lead to stability issues over time.
- Pavers or Bricks: Using pavers or bricks can create a visually appealing and sturdy foundation, with costs ranging from $10 to $20 per square foot. This option is durable and allows for drainage, but installation can be labor-intensive and may require a more significant upfront investment.
- Precast Concrete Blocks: Precast concrete blocks are another durable choice, typically costing around $2 to $4 per block. They offer flexibility in design and are relatively easy to install, but additional labor may be required to ensure an even and stable surface for the hot tub.
- Composite Materials: Composite bases, made from a mix of wood fibers and plastic, can range from $10 to $25 per square foot. These materials are resistant to rot and insects, require little maintenance, and provide a modern look, but they can be more expensive than traditional wood or gravel options.
How Can You Ensure Long-Term Success with Your Hot Tub Material Selection?
Selecting the right material for under your hot tub is crucial for long-term success and maintenance.
- Concrete: A popular choice for its durability, concrete provides a solid and stable base for hot tubs, preventing sinking or shifting over time. It can be poured to form a perfectly level surface, which is essential for the proper functioning of the hot tub, and it’s resistant to moisture damage.
- Wood Decking: While aesthetically pleasing, wood decking must be treated to withstand moisture and heat. Using rot-resistant wood like cedar or redwood can enhance longevity, but regular maintenance such as sealing is necessary to prevent decay and ensure the structural integrity of the support.
- Composite Materials: These are engineered to resist rot, warping, and fading, making them an ideal choice for hot tub bases. Composite materials combine the best of wood and plastic, providing a durable surface that requires little maintenance while still offering a natural appearance.
- Gravel Base: A gravel base allows for excellent drainage, which can help prevent water from pooling around the hot tub. It also provides a level surface if properly compacted, but it may require additional framing to maintain stability over time.
- Rubber Mats: Using rubber mats under your hot tub can provide cushioning and reduce wear on the bottom of the tub. They also help with drainage and can be easily replaced if they become worn, making them a cost-effective and practical option.
- Interlocking Pavers: This option offers a customizable and aesthetically pleasing surface that can handle the weight of a hot tub. Pavers are durable and can easily be replaced if damaged, making them a flexible choice for long-term use.