Our commercial heavy duty pressure washers,blowers, mechanical brooms and professional Cut-off Machines are run by Petrol so we do not require electricity.
Is there a “whitish haze” covering your beautiful new driveway? Or is the color of your pave uni all faded and pale? The white residue on top of the pave uni is a condition called efflorescence. Before you pick up the phone to complain or call your contarctor, we urge you to read this. The white haze you’re seeing is called pave uni efflorescence and while it may be ruining the appearance of your driveway, efflorescence is completely natural and is not damaging your pave uni in any way. Efflorescence, also known as ‘calcium hydroxide’ can occur a few weeks or months after the installation of your pave-uni and is much more common than you may believe.
Why does it happen?
All concrete products contain cement. As the cement hydrates, it produces lime or water soluble salts, such as calcium hydroxide. The calcium hydroxide is soluble in water and therefore migrates to the surface of the pave-uni through capillary action. When the calcium hydroxide reaches the surface of the pave uni, a chemical reaction occurs with the carbon dioxide in the air. As it reacts with the carbon dioxide, the calcium hydroxide forms a water insoluble calcium carbonate. The calcium carbonate creates the whitish haze on the surface of the pave uni.
The following example is a pave uni that we did for a client. It’s a year old and you could see the pave uni has almost all a beige finish and its all pale. Efflorescence before picture and in the next picture, we cleaned with a efflorescence removal and manual brushing the entire surface and the difference is incredible. Efflorescence after picture.
Now that you have a better understanding of what efflorescence is, it’s time to eliminate it! Let us do what we do best! call us for a free estimation.
Before cleaning and sealing a new pave uni surface, we recommend that you one year so that you let the efflorescence rise to the surface.
