delivery_truck_speed Free Ground Shipping on most orders over $99.99
To shop for your new spa cover, please Select Your Brand -OR- Select Your Shape.
Is your MANUFACTURER or MODEL NOT LISTED? NO PROBLEM! We make covers for just about ANY HOT TUB!
Virgin EPS Foam Cores
Our insulating, tapered foam cores are strong, energy-efficient and will shed water.
SPALUX Premium Spa Vinyl
The best performing vinyl covering fabric due to its superior strength and UV resistance.
Strong Polyester Bottom Material
12oz. Double-laminated. Treated and tested for chlorine, bromine ozone resistance.
Convenient Open/Close Handles
Super-strong featuring a rubber grip for easy opening and closing. Upgrade to rubber grip handles for a nominal fee.
Waterproof Vapor Barrier
Double-wrap your foam for more protection. Industry-leading thickness protection. Helps keep moisture from getting into your foam cores.
Strong Tie-Down Straps
Our covers come with all the hardware you need to install it. Broken clip? Don't worry. It's all included with your new spa cover.
Steel Support C-Channel Beams
Our steel supports offer maximum strength to discourage bowing.
UV-resistant SunGard Thread
93# UV and mildew-resistant polyester industrial thread keeps our covers stitched for years.
ASTM Safety Cover
Our covers are manufactured to meet or exceed ASTM 1346-91 for manual safety covers.
Our Thermal Guardian spa covers are a cut above the competition a blend of premium-quality spa cover features at a competitive price. They feature the following, setting us above the competition:
Our Thermal Guardian Premium Spa Covers are great looking!
Are you buying from someone that knows spa covers or someone telling you what you want to hear? We know about covers because we have marketed and sold them for a long time.
Our SpaLux vinyl has been specially formulated for the rigors that outdoor spa covers face. Exceeds the specifications of premium marine-grade vinyl.
infomore info
We offer a variety of densities and tapers to give you more of a selection of price to functionality. Our spa covers are tapered so the rainwater runs off your cover instead of puddling on it. We highly recommend our Thermal Guardian models because they feature 2 " of fall instead of only 1" found on offerings from other retailers.
Our custom made-to-order spa covers are all specifically crafted for you and typically ship in 6 to 12 weeks. Need it faster? We offer a Rush Service so it ships in no more than 5 business days! infomore info
Thermal Guardian spa covers exceed the specification for center-deflection perimeter rescue and the safety labeling requirements of ASTM F1346-91. Some jurisdictions are requiring that spa covers be manufactured in accordance with these guidelines. infomore info
The recipe for a great, long-lasting spa cover is simple. You start with Premium Materials. You acquire Superior Technology and assemble a team of experienced Quality Craftsmen and women who are paid to care what the product looks like. The watertight vapor barrier is sealed with a 9' long computer-controlled impulse sealer that makes a seal second to none. It is drastically better than foam cores sealed with small, undependable hand sealers. Our covers' patterns are cut by Otto. That would be the computerized cutter that doesn't make a mistake within a 1/1000th of an inch. There aren't computers that sew the cover, but even better a team of seamstresses tailor your cover to the fit you require.
A spa cover is the sum of its parts. If you use good materials in the manufacture of a spa cover, you will get a good spa cover. In over 20 years of spa cover manufacturing, our manufacturer has found the finest materials available to build our covers. From the UV-treated thread to the industrial zippers and the premium SpaLux vinyl to the virgin EPS foam, Thermal Guardian premium spa covers are manufactured to the highest quality standard.
*Clicking on each color will open a new window with a larger color swatch
Since 1983, we have literally made hundreds of thousands of covers. We are so proud when someone takes time to send us a note expressing how much they like our work. Here are just a few of the testimonials we've received over the years.
This heavy-duty custom-made cover is designed for spas and hot tubs located in seasonal climates that see moderate snow during winter months.
This extreme-duty custom-made cover is designed for spas and hot tubs located in northern climates that see extended snow during winter months.
This moderate-duty custom-made cover is designed for spas and hot tubs located in temperate climates that may see occasional snow.
This economy-grade custom-made cover is designed for indoor spas and hot tubs. This cover is NOT WARRANTED for outdoor use.
It's just a way to communicate to you the differences between our models. We suggest you use these pictograms as a guide to choose among the varying spa cover base models that we offer. Think of them as comparing one Thermal Guardian model to another.
Everything you need to know about choosing, measuring, and caring for your spa cover.
A spa cover or hot tub cover insulates your spa, helping retain heat while protecting the water from debris, weather, and evaporation. A well-built cover can dramatically reduce energy loss and keep your spa clean between uses.
High-quality covers like those offered by SPA-MART use insulated foam cores, durable vinyl, and vapor barriers to maximize heat retention and long-term durability.
Most spa covers last 4 to 7 years, depending on climate, sun exposure, and how well the cover is maintained.
Over time, foam cores can absorb moisture and become heavy, which reduces insulation performance. SPA-MART replacement spa covers are designed with strong vapor barriers and optional upgrades like double-wrapped foam cores to help prevent water absorption and extend the life of the cover.
Spa covers are the primary source of insulation for a hot tub. Because spa water is typically maintained around 100°F, heat naturally rises and escapes without a properly insulated cover.
A well-designed insulated spa cover helps trap heat, reduce heating costs, and keep the spa at a stable temperature. SPA-MART covers feature high-density foam cores, tapered insulation, and optional energy-saving upgrades to improve heat retention.
Foam density affects both the strength and insulation performance of a spa cover.
Standard spa covers often use 1.5 lb density foam, while upgraded covers use 2 lb density foam, which is stronger and more resistant to water absorption over time.
SPA-MART offers 2 lb density foam core upgrades that provide greater durability, improved energy efficiency, and longer-lasting insulation performance.
A tapered spa cover is thicker in the center and thinner at the edges. This design allows rainwater, snow, and debris to run off instead of pooling on top of the cover.
Proper taper improves durability and helps prevent sagging. SPA-MART spa covers use engineered taper designs to improve water runoff while maintaining strong insulation.
To measure a replacement spa cover, you typically need:
SPA-MART provides easy measurement guides and customer support to help ensure your replacement spa cover fits properly.
High-quality spa covers are built with materials designed for outdoor durability and insulation.
Key materials include:
SPA-MART spa covers combine these materials to create durable, energy-efficient replacement covers.
Over time, spa cover foam can absorb moisture if the vapor barrier is compromised. When this happens, the cover becomes heavy and loses its insulation ability.
SPA-MART spa covers use heavy-duty vapor barriers and optional double-wrapped foam cores to help keep moisture out and maintain insulation performance.
Yes. Custom spa covers provide a tight, accurate fit that helps prevent heat loss and keeps debris out of the spa.
Stock covers often leave gaps or do not match the exact shape of the spa. SPA-MART specializes in custom replacement spa covers built to match the exact dimensions of your hot tub.
Replacement spa covers can be purchased online from specialty retailers that focus on spa cover construction and customization.
SPA-MART.com specializes in durable, energy-efficient replacement spa covers with customizable upgrades designed to improve insulation, durability, and long-term performance.
A high-quality insulated spa cover helps trap heat inside the spa, reducing the amount of energy required to maintain water temperature.
By improving insulation and reducing heat loss, spa owners can often lower their heating costs while keeping the spa ready to use.
SPA-MART spa covers are designed specifically to maximize insulation performance and long-term energy savings.
Several construction features can improve spa cover lifespan:
SPA-MART offers upgrade options such as reinforced hinges, double-wrapped foam cores, and energy-saving insulation enhancements to help spa covers last longer.
Spa covers usually become heavy because the foam cores absorb moisture. Over time, vapor barriers can weaken and allow water vapor from the hot tub to enter the foam. Once the foam becomes saturated, the cover gains weight and loses insulation performance.
SPA-MART spa covers use heavy-duty vapor barriers and optional double-wrapped foam cores to help prevent moisture intrusion and keep the cover lighter for longer.
A typical new spa cover weighs between 40 and 70 pounds, depending on size, foam density, and insulation thickness. The cover should feel manageable to lift and operate with a cover lifter.
If a spa cover becomes extremely heavy, it is often a sign the foam cores have absorbed water and the cover should be replaced. SPA-MART replacement spa covers are designed to maintain structural strength while resisting water absorption over time.
Yes. A properly insulated spa cover is especially important in cold climates, where the temperature difference between the spa water and outside air is greater.
Features that improve cold-weather performance include:
SPA-MART spa covers offer energy-saving upgrades such as higher-density foam, full-length hinge seals, and reflective insulation technology to help maximize heat retention in colder environments.
The most energy-efficient spa covers typically use 4–5 inch tapered foam cores, with the thickest insulation in the center and slightly thinner edges to allow water runoff.
Thicker insulation improves heat retention and reduces energy loss. SPA-MART spa covers are available with multiple taper options and high-density foam upgrades to help maximize insulation and heating efficiency.
There is no functional difference between a spa cover and a hot tub cover. The terms are used interchangeably to describe the insulated cover that sits on top of a portable spa.
Both serve the same purpose: retaining heat, protecting the water, and improving safety. SPA-MART offers custom spa covers and hot tub covers designed for durability, insulation, and long-term outdoor performance.
Yes. A well-insulated spa cover significantly reduces heat loss by trapping warm air above the water. Without a proper cover, heat escapes quickly and the heater must run more frequently.
High-quality insulated spa covers like those from SPA-MART use dense foam cores, tight-fitting designs, and optional energy-saving upgrades to help reduce heating costs and maintain water temperature.
Most spa covers include a center hinge so the cover can fold in half when opening the spa. This design makes the cover easier to lift and allows it to work with spa cover lifters.
Because the hinge is one of the most frequently used areas of a spa cover, SPA-MART offers reinforced hinge construction and optional full-length hinge seals to improve durability and insulation performance.
The best replacement spa covers use WeatherGuardian premium polyester fabric, closed-cell foam insulation, and durable vapor barriers designed for outdoor environments.
These materials help resist weather damage, maintain insulation, and prevent moisture absorption. SPA-MART spa covers combine these premium materials with custom sizing and durable construction to provide long-lasting replacement covers.
arrow_right How the care for your spa cover
arrow_right Spa Cover Frequently Asked Questions
arrow_right Spa Cover Delivery Overview & Details
arrow_right 5 Year Limited Warranty on our Thermal Guardian spa covers
arrow_right Why buy a cover that complies with ASTM F1346-91?
arrow_right Why should your spa cover's foam be tapered?
Hot Tub Cover Upgrades