(De) Constructing a Hot Tub or Swim Spa Shell

When deciding what kind of swim spa or hot tub to buy for your home, there are many great options available worldwide. The major factor to consider is the construction materials of the spa and their country of origin, and quality and integrity of the components. Selection of your construction material is an important decision to make before you buy because the type of material your hot tub or swim spa is built with will determine:

  • The durability and strength

  • Number of years your swim spa pool will hold up

  • Maintenance issues

  • Flexibility of customization and design elements

Make an informed decision that best suits your needs and lifestyle


Is it a fiberglass (gel coat) or acrylic shell? An acrylic pool shell is common for many swim spas, hot tubs and residential pools. It is usually a lower cost option, but may require upkeep and recurring maintenance. The acrylic spa quality depends on how thick the acrylic layer is, as well as what material makes up the substructure. Acrylic swim spa pools with a hand-rolled fiberglass substructure are considered highest quality and more durable.