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Hot tubs by Aqua Hot Tubs in Berkshire




Villeroy & Boch hot tubs
What to Look For - Foam Insulation


Advantages of  Foam Insulation System


Green Building product
No formaldehyde, CFCs, HCFCs, HFCs, HFAs
Air sealing properties to lock out dust, allergens, odours and pollutants
Minimised condensation and potential for mould growth


Eliminates noise of plumbing
Reduces spa noise in the night

More Energy Efficient

Eliminates air leakage for significant monthly savings
Maintains constant spa water temperature with less energy

Features Over Other Foams

Certified by Envirodesic Certification Programme
Water damage won't reduce performance
Won't absorb or draw up "wick" water
Contains no ozone destroying gas
Does not shrink
Performance will not decline with time

When considering the purchase of a spa, the type of  insulation used will be one of the largest factors affecting your energy efficiently and overall cost of running the spa. Insulation is used primarily to insulate the shell and cabinet and decrease the amount of energy required by the heater to maintain a given temperature level.

Insulation for a Mistral Hot Tub

Simply put, better-insulated hot tubs use less electricity and are cheaper to run. Most premium North American spas manufacturers use Urethane Foam Insulation as the preferred method for multiple benefits. Foam insulation acts as a sound barrier, which can decrease plumbing and equipment noise. Foam insulation also acts as additional support for plumbing components, resulting in less movement and stress on joints and fixtures. In the high humidity environment of a spa, it is critical to use insulation which is moisture resistant and able to maintain structural integrity after years of being exposed to the temperature variations and stress of spa operation. If the insulation absorbs water or allows no drainage, water build up over time could produce mould and other organisms in the shell area which could be a health concern. Water-logged insulation can also sag and deteriorate, resulting in areas of the spa not being insulated and increasing energy costs to run your spa.

Foam Insulation
Used as a premium insulation designed specifically for use in spas. The high insulating value of Icynene provide an average insulating factor of R50, with special characteristics which allow leaks to be contained and quickly removed from the insulation. Foam insulation systems have been proven to have fewer leaks as there are less stress areas and movement on plumbing fittings. Master Spas add a rigid foam layer on the shell and all the plumbing to rigidize the pipes so there is no movement in them when the jets are switched on. Foam insulation provides excellent sound absorption characteristics, reducing plumbing and equipment noise and vibration.

What is Icynene?
Icynene is polyicynene expanding foam insulation, an environmentally safe development in low density, cellular plastics. Chemically, it is in a class of its own. Whereas urethane based foams loses up to 50% of its insulating value within 5 years, Icynene insulation maintains its insulating value for the life of the product. It allows foam to be sprayed without ozone destroying gases (HFAs or HCFCs) or formaldehyde. The micro-cells of this breathing material are filled with air and there are no gas emission hazards. Icynene is the only insulation material certified by the Envirodesic Certification Program for healthier air quality.

Locks out the cold.
The Icynene Insulation System expands to 100 times its initial volume in seconds to insulate and air-seal the spa envelope. The resulting blanket of soft foam insulation forms a continuous thermal barrier that eliminates cold spots and significantly reduces energy costs. A consistent, comfortable temperature is maintained inside the spa, while cold air is kept outside.

By minimizing air leakage, there is a reduction of airborne moisture movement through the spa envelope. This helps to prevent condensation, which can result from moisture-laden interior air contacting the cold outer layers of the wall. Icynene offers peace-of-mind to homeowners by minimizing the potential for condensation related problems, such as the growth of mould and mildew under the spa.


Foam Insulation (Urethane)
Used by most premium spa manufacturers for high insulation value and plumbing support. However, In the event of a leak, the foam insulation is pulled out around a lot of the acrylic as it is impossible to locate the problem area. When Urethane foam gets saturated with water, it will absorb the water and loses its insulating properties. The foam insulation's structural integrity does not remain.

Perimeter Insulation / Dead Air Space / Heatlock
This system involves a layer of rigid foam being sprayed on the inside of the acrylic shell, leaving open air space in between. The area needs to be completely sealed by adding thermal insulation material to the inside of the four walls of the cabinet as well as to the base - as on a Wellis spa.

Skim Coat
This type of insulation involves spraying a few inches of rigid urethane foam over the spa shell surface. The plumbing lines are not insulated or supported, which can cause strain on joints and fixtures with the weight of the water-filled hoses and jet action. There is also no sound absorption quality to this insulation type.

Mineral Wool
This insulating system is quickly degraded in the high humidity area inside a hot tub cabinet. As the insulation absorbs and retains water, the weight causes sagging and reduced insulation value, as well as potential mould collection.

Foil-Lined Insulation Panels
This is a highly efficient insulating system in radiant heating, such as reflecting solar heat. This system works with adding rigid foam to shell and extending the foil-lined insulation to the floor.

What's Right For You?
Make sure that whatever system you choose matches your environment as well as your budget. Ask for documentation from the manufacturer in regards to energy requirements and don't accept anything less than unbiased third party reporting.



Choice of 10 colours with multiple textures that includes the patented Microban with bacteria inhibitor. 

Our unique structural frame is engineered from pressure treated solid wood with individual I-beam supports. It ensures equal weight distribution and the long-term structural integrity of the hot tub.
Master Spas Hot Tubs at Aqua Hot Tubs

Area of coverage for hot tubs and swim spas
We provide full hot tub service to cover Bucks, Berkshire, Hampshire, Surrey, London, Wiltshire and Oxfordshire. eg. Windsor, Iver, Datchet, Eton, Wraysbury, Sunninghill, Sunningdale, Winkfield, Ascot, Didcot, Fleet, Guildford, Gatwick, Crawley Englefield Green, Binfield, Bracknell, Finchampstead, Wokingham, Warfield, Wargrave, Wallingford, Hare Hatch, Egham, Staines, Chertsey, Windlesham, Virginia Water, Wentworth, Farnham Common, Gerrards Cross, Slough,  Taplow, Maidenhead, Twyford, Reading, Dorney, Holyport, Oakley Green, Marlow, Cookham, Bourne End, Denham, Fulmer, Stoke Poges, Uxbridge, Hillingdon, Heathrow, Hurley, Hayes, Pingewood, Tadley, Thatcham, Newbury, Theale, West Drayton, Pangbourne, Northwood, Moor Park, Lightwater, Ruislip, Northolt, Harrow, Pinner, Eastcote, Ealing, Ickenham, Amersham, Beaconsfield, High Wycombe, Sonning, Caversham, Henley on Thames, Wokingham, Crowthorne, Earley, Woodley, Earley, Winnersh, Basingstoke, Fleet, Bagshot, Camberley, Farnborough, Thame, Bray, Richmond, Golders Green , Luton and London. Now including Portsmouth and Wales.

Hot Tubs Berkshire ~ Hot Tubs Surrey ~ Hot Tubs Hampshire ~ Hot Tubs Oxfordshire ~ Hot Tubs Wiltshire ~ Hot Tubs Luton

 Located at Ladds Garden Centre, Bath Rd, Hare Hatch, Reading, Berkshire RG10 9SB