Showerdome is an inexpensive acrylic moulded dome that fits to the top of your shower.

• It stops the creation of steam and release of moisture into the air, preventing toxic mould and mildew.
• Showerdome can be installed on most existing or new showers.
• It makes your shower warmer and keeps the bathroom drier, helping to create a healthier environment.
• It also helps to reduce energy costs and green house gases.

For lots more additional information on Showerdome please feel free to check out our sister websites at:

• Showerdome New Zealand
• Showerdome Australia

How does Showerdome work?

Showerdome is a simple, well-known scientific principle that makes everyone wonder why it took so long to apply to bathrooms.

– Click on the above pictures to see how Showerdome works!

What is Condensation?

Condensation occurs when water vapour in the air changes back to its original liquid state – water. Outside, condensation may appear as clouds, fog, mist, dew or frost. Inside it will appear as ‘steam’ in the air, liquid condensation on windows and cold surfaces or damp on walls and ceilings. It will also result in damp bedding, curtains, carpets, clothes, etc.

Condensation is the result of 2 different air temperatures meeting each other. All air contains varying quantities of moisture in the form of water vapour.  The cooler the air, the less water vapour – the warmer the air the more water vapour. That is why the North and South Poles are actually very dry and experience very little rain while the equatorial areas are hot, have high humidity and experience lots of rain.

When warm air is cooled, relative humidity increases, until at a particular temperature, called the dew point, the air becomes saturated. Further cooling below the dew point will induce condensation of the excess water vapour.  This process is observed outside by the formation of clouds which occur when warm moist air rises. Eventually the clouds rise high enough to cool or meet cool air currents that reduce the air temperature resulting in the water vapour turning back into water and falling to earth as rain. The same thing occurs in your bathroom shower.

Warm moist air rises in the shower cubicle until it meets the relatively cooler air in the bathroom.   Where these two air masses meet, visible water vapour occurs – that’s the clouds of ‘steam’ you see. (It’s incorrectly called steam because real steam only occurs when the temperature in over 100 degrees centigrade – that would scald.)



The Showerdome Invention

Ken Evans is the inventor from Tauranga in New Zealand. One night he was watching rugby on television. At half time he scurried out to the kitchen to make a cup of tea.  While impatiently waiting for the jug to boil, he noticed steam coming out the nozzle of the glass electric kettle … but saw there was no steam inside the kettle above the boiling water.  The inside of the see-through kettle above the hot bubbling water was clear.

It suddenly dawned on him that the visible steam is not created until the moist hot air reaches the cooler air outside the kettle. Just like clouds are made outside … the warm moist air rises until it reaches a cooler air layer then it condenses into visible moisture droplets.  He realised the same principle applied in his shower.

Ken rushed into the basement and found a flat sheet of material to put on top of his shower. He turned on the tap full hot and even after half an hour there was no steam in his shower or bathroom. He had discovered for himself the simple scientific principle that creates the moisture in the bathroom. For years like others, Ken had been trying to deal with the steam by having heated mirrors, extractor fans and heaters. Now he had no need for any of these gadgets that were expensive to run and didn’t help reduce the steam – he had found the secret of not having any steam to start with.

Ken forgot all about the rugby game and his cup of tea!