• Urethane spray foam used for insulating hot tubs is a two-part chemical product that when mixed, results in an expanding foam component. It is used under strict safety codes because of the unhealthy ‘off gassing’ fumes.

• The resulting foam expands into the cavities of the hot tub solidifying as it cures sealing all ventilating apertures. We all have to breathe, and so does your hot tub. Preventing air circulation inside the cavity of the hot tub creates the perfect condition for possible future mold growth.

• Once the hot tub has been foam-filled it is extremely difficult to service the tub particularly if you experience a water leak in the complex plumbing underneath the tub. A simple plumbing defect can take hours to trace and repair. Tracing the leak becomes more difficult than the actual repair.

• The biggest problem occurs after the repair has been completed and you have taken out the wet foam to reach the leak area. What do you use to replace the insulation you have removed? Usually, this is done with an expensive canned substitute of the foam which inevitably does not have the same insulation properties of the originally installed foam – in other words, it is being replaced with a substitute that may possibly affect the insulation qualities of the hot tub. There is also the problem of discarding the saturated foam which must be packed separately and isolated from normal garbage.

• Any water contamination from the internal plumbing deteriorates the foam creating a sludge that is prone to mold growth and if the foam has been used as a structural substitute, this can possibly weaken the spa.

• Practical to use; anyone can handle it safely. Sold in most hardware stores this amazing material is readily available.

• Can be removed and replaced without instruction, just use a common sense approach when handling this material.

• Roxul is fire retardant. Even when held to a naked flame it will not ignite.

• Environmentally prudent; disposal, if required, can be the same as with any household garbage.

• Water repellent. If a leak occurs in the tub it cannot damage the Roxul. Being water repellent,  moisture will pass right through the Roxul leaving it completely dry.

• Deters rodents because it is an inert material made from lava rock that cannot be eaten or affected by animals.

• Recyclable; there is no need to throw it away. Just store it in a dry environment for future use.

• Roxul has an R-Value equal to or better than traditional insulation materials including low-density open cell urethane foam.

• Roxul is used in many commercial and residential buildings costing millions of dollars. Does it make sense to use such an amazing material in a product costing much less? Of course, it does, that is why we led the way by using Roxul as an insulating system in all H2O Spas.

• How much is your house worth? Hundreds of thousands of dollars? Most houses are now built using Roxul Insulation, it makes sense to use it as an insulator in your hot tub.

• Helps reduce equipment noise. Roxul is renowned for its ability to capture noise and is used extensively as a noise barrier.

Remember that each person also needs leg space. The superior size and depth found in the footwell of an H2O spa allows you to put your feet directly down in front of you in a natural seating position. This allows everyone their own foot space. Never buy a spa without sitting in it with or without water to assess the seating comfort.

How many jets should a spa have?

What is the difference between an air jet and a water jet?