Industrial concrete resurfacing is a step-by-step process. Moisture testing before coating is one of the important steps involved. Unfortunately, moisture-related issues are still being experienced in industries due to factors such as fast-track construction schedules that don't pay attention to moisture testing thus leading to great repercussions.
What are the advantages of moisture testing industrial flooring before coating?
One importance of moisture testing is ensuring the compatibility of patching, leveling and coating materials. A moisture test conducted on industrial flooring before coating establishes the moisture level of the concrete. Different types of coatings have different recommendations from their manufacturers. Therefore, the acceptable humidity level depends on the surface treatment to be applied. If the floor is not dry enough when it is time to apply an adhered floor coating, the owner and contractor may consider alternate finishes. When hybrid coating systems are to be used, the moisture level of the concrete is used to determine the suitable combinations of the system to be used.
Timing for coating
Moisture testing is important in determining the appropriate timing for coating to be carried out. This is especially so when the coating material to be used is of low permeability. If the water level of the concrete is found to be unacceptable, more time is given to allow it to dry naturally. Certain products such as topical vapor barriers may be used to reduce the concrete's moisture content and permeability.
Prevention of various forms of distress
If the floor coating is applied while the concrete has high moisture content, water migrates from the lower regions to the upper regions of the concrete by osmosis. It dissolves the alkalis present at the bond line. This concentrated solution damages the concrete/coating interface hence may result in debonding of coatings. Another explanation put forward by concrete experts is that with prolonged exposure to the moist conditions at the bond line, some water soluble materials leave the coating. They move to the bond line where the environment is highly alkaline. This substantially weakens the coating's bond to the concrete. Other forms of distress that may occur as a result include formation of osmotic blisters, expansion of flooring material for example cupping of wood planks or strips, staining, efflorescence, curling and microbial growths. Moisture testing therefore helps in preventing industrial flooring from these forms of distress.
It is therefore important to hire a reputable contractor that will carry out extensive moisture testing to prevent your company from incurring unplanned expenses in the future.