Top Class Concrete Treatments
EXPERTS IN ACID WASHING / ETCHING
Acid washing is a process used on concrete in preparation for sealing. It cleans and opens the surface so that a sealer can be applied. Acid helps remove dirt from the surface of the concrete and can benefit the colour consistency. Typically, we use a 7% - 15% acid solution to achieve this result. Acid etching, which is generally a 20% - 40% acid solution, burns off the top 1mm of the surface to expose the fine sands and aggregates creating an aged look and an anti-slip surface.
We take the utmost care when performing acid washing or etching at your property and have many Health and Safety measures in place to ensure that you and our team are safe at all times.
SPECIALISTS IN CONCRETE POLISHING/ DECORATIVE GRINDING
Polished concrete is the result of a mechanical process in which concrete is put through a series of polishing/grinding steps and has professional equipment designed specifically for this purpose. This process also includes the use of a penetrant chemical known as a densifier/hardener which enters the concrete and creates a chemical reaction to help harden and dust proof the surface. During concrete polishing the surfaces are worked through a sequence of steps (in general a minimum of 6) employing the use of progressively finer grinding tools. The grinding tools we use are progressive grits of industrial diamonds in a bonded material, such as metal, hybrid or resin often referred to as a diamond grinding or polishing pad. Our polished concrete is normally finished to 800 grit.
There are different levels of stone exposure for a polished concrete. A full grind removes between 4-6 mm of the concrete to expose the larger stones, a medium grind removes between 2-3 mm to only expose the smaller to medium sized stones and a Salt and Pepper removes 1-2 mm of surface concrete, allowing a random size of stone to be shown. There is also a natural polish which removes 0-1 mm of the concrete and shines the surface giving it a marble style effect. Polished concrete is n excellent choice for the environment as it is a green flooring system.
SPECIALISTS IN CONCRETE CUTTING/GROUTING
Control joints are planned in your concrete to allow for movements caused by temperature changes and drying shrinkage. If the concrete does crack, the cuts play an active role in controlling the crack along the control joint instead of randomly. Although this happens most of the times sometimes the concrete will still crack in other places.
We space the joints no more than 25-40 times of the slab thickness. A 100mm slab should have joints 2.5-4.0 m apart at a depth of 30% the depth of the slab. A 100mm thick slab should have expansion cuts at least 30mm deep. We cut expansion joints as soon as the concrete is hard enough that the edges abutting the cut don’t chip from the saw blade.
Decorative 10mm cuts can then be placed over the top of this control joint and at other intervals to give the tile effect
Grouting is done to fill the 10mm decorative cutting that is done to achieve a flagstone paver look, at a fraction of the price. We use a specifically designed tool that compresses the grout into the cut lines, leaving a consistent, smooth finish. Grouting is the best look for your 10mm concrete cuts and prevents the cuts from filling with dirt and weeds. We use the correct Concrete Construction Grout to insure your job is completed to a high standard.
Frequently Asked Questions
From "Can overlay treatments be put over timber floors?" to "Are there different types or levels of acid washing?", we have all the answers to Frequently Asked Questions.