Hot tubs may seem like relatively simple outdoor accessory, however beneath the warm water and massage jets there is a surprisingly complex combination of materials, all working together to ensure you have a comfortable, durable and aesthetic place to soak away your worries.
In this blog, we’ll explore the different materials used to build hot tubs – both inside and out! Let’s get started…
The Shell
The shell of a hot tub is the interior surface that you sit on, not the outside covering as the name may suggest. The shell will come into contact with both the water and your body, so it needs to be smooth, strong and resistant to moisture, chemicals and UV rays.
Common Shell Materials:
- Acrylic is the material that is used for most high-quality hot tub shells. It is smooth, durable and can withstand exposure to water, heat and chemicals. Plus, acrylic shells can come in a variety of different colours and textures and be moulded into a variety of comfortable ergonomic shapes. Typically acrylic shells are also reinforced with fiberglass for added strength and durability.
- Rotomolded plastic (Polyethylene) is another popular and more affordable hot tub shell material. Rotomolded plastic tends to also be lightweight and durable, however doesn’t have a glossy finish or opportunity for customisation like an acrylic shell does.
- Vinyl can also be used as a hot tub shell material but is more commonly seen in temporary or inflatable tubs.
The Cabinet
The cabinet is the exterior housing of the hot tub that protects the internal components and insulation.
Common Cabinet Materials:
- Synthetic wood made from resin or composite is a common material used for hot tub cabinets as it mimics the look of real wood but requires far less maintenance. These materials are ultra-durable, providing resistance to rot, insects, fading and cracking.
- Real wood like cedar or redwood can also be used to create a beautiful and rustic hot tub cabinet, however requires regular maintenance and sealing to prevent weather damage.
- Plastic can also be used to create durable and lightweight hot tub cabinets.
The Frame
The frame of a hot tub acts as its backbone, supporting the entire structure of the tub. It therefore needs to be made from super durable materials.
Common Frame Materials:
- Pressure-treated wood is often used for hot tub frames as provides an ultra-strong and stable base.
- Steel or aluminium is another excellent choice, often found in premium models. Metal frames are extremely durable and resist warping and corrosion.
- Plastic frames are also used in some rotomolded or portable tubs, however lack durability and strength.
Insulation
Insulation is crucial for maintaining water temperature and keeping energy costs low for your tub.
Common Insulation Types:
- High Density Foam is the highest-quality insulation method. This foam not only reduces the amount of heat that escapes your tub into the outside environment, but also strengthens the structure of your tub overall.
- Reflective Foil can be used on its own or in combination with foam insulation to reflect heat back into the tub.
Plumbing
The plumbing system is what delivers water to the jets and back through the filtration system.
Common Materials:
- The waterlines and fittings in hot tubs are usually made from PVC as it is durable and flexible.
- The jet components are usually made from durable plastic, however high-end models sometimes use stainless steel.
At Premier Hot Tubs, we know that every component plays a key role in delivering a relaxing, long-lasting spa experience. That is why all of our hot tub models feature composite wood cabinets insulated from the inside with aluminium foil and high-density polyurethane foam. We also know that the aesthetic and feel of your hot tub matters, which is why we offer a range of shell and cabinet finishes and fit all our hot tubs with stainless steel jets.
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