Hot Tub Shells and Cabinets - the Most Important Parts of the Hot Tub

While all ThermoSpas® hot tubs are built with the highest quality materials and components, this is especially true of the exterior of the hot tub. The shell and cabinet receive the most exposure to the elements as well as normal wear and tear with use. That’s why ThermoSpas uses only the best materials and cutting edge technology to create the most durable hot tubs in the world.

  • Designer Color Options
  • Extremely Durable
  • No Fading or Scratching
  • Highest Quality Materials
  • Cutting Edge Technology
  • Easy to Clean & Maintain

Hot Tub Shells

hot tub shells continuous cast acrylic

Continuous Cast Acrylic

ThermoSpas uses only the highest quality continuous cast acrylic (CCA) sheet available for exceptional quality and durability.

Other manufacturers use inexpensive materials such as gelcoat, OAS plastic, and composite acrylics that often fade over time and are susceptible to signs of aging. Spas constructed with only a vinyl liner are easily damaged and often require repair or replacement in a few short years.

Our CCA includes UV inhibitors that prevent color fading when exposed to sunlight. The surface of a ThermoSpas® shell is smooth and luxurious to the touch, yet durable enough to resist stress cracking and scuffing. Plus, CCA is a non-porous material which makes it simple to clean. ThermoSpas® shells will look beautiful for generations to come and require very little maintenance.

Your Choice of Shell Colors

ThermoSpas® hot tub shells are available in eight colors including Blue Stone, Desert Stone, Copper Beach, Silver Marble, Ocean Wave, Black Opal, Frosted Pearl, and Calico Marble.

ThermoSpas® swim spa shells are available in Blue Stone and Glacier White.

Hot Tub Cabinets

hot tub cabinets thermoboard

ThermoBoard™ – No Warping, No Fading, No Maintenance

ThermoBoard™ isn’t wood – it’s far better. It’s a weatherproof synthetic, designed to mimic the rich look and feel of wood without the needed maintenance. It features attractive tongue and groove construction and won’t rot, fade, or warp as natural wood panels can and doesn’t need sanding or staining.

Plus, ThermoBoard™ is:

  • More energy efficient than wood
  • Virtually maintenance free – no sanding or staining required.
  • Easy to clean – simply spray with a garden hose.
  • Reversible – doubles the life of the cabinet.
  • Incredibly strong and durable – it is moisture-resistant, insect-resistant, and most importantly, UV resistant. It won’t warp, rot, fade, or shrink.
  • 100% knot-free – the color saturates each panel making it consistent and protecting it from nicks and scratches.

hot tub cabinet top rails

Top Rails Complete the Design

ThermoSpas® top rails are designed to add a rich profile and serve as bumpers to protect the spa’s acrylic shell. Many manufacturers eliminate the top rail to save money or use wood that requires continual maintenance. All of ThermoSpas® top rails are made of specially formulated ThermoBoard™ that provides the protection and look of quality furniture. ThermoSpas® top rails are beautiful, tough, and never need maintenance.

hot tub cabinet colors

Your Choice of Cabinet Colors

ThermoBoard™ panels, steps, and accessories come in three popular colors to accommodate every taste: American Cherry, Burmese Teak, Mahogany, and Nantucket Gray.


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Because of our hectic, busy schedules we have little time to spend together as a family. Now, we climb into our hot tub and enjoy special family time together.

Karl V. A.

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