Should I Test My Concrete Slab for Moisture? скачать в хорошем качестве

Should I Test My Concrete Slab for Moisture?

It is important to evaluate and take steps to manage the moisture coming from your concrete subfloor. This video explains why you should test your concrete floors for moisture and three different ways you can do so. Product Selector Tool: https://www.mpglobalproducts.com/floo... How to Perform a Calcium Chloride Test Video:    • How to Test Your Concrete Subfloor for Moi...   Transcript: The effect of seasonal change in concrete subfloor moisture correlates directly with rainfall and groundwater tables. Surface water during the rainy season also plays a part. Even the driest of climates can have an unusual amount of rain that can turn a dry creek bed into a raging river, and metropolitan areas have streets and parking lots that can be inundated during heavy downpours. Cyclic changes of damp soil vary, and since concrete is porous and capillary, moisture can rise and fall in a slab just as it does in the soil. This is true whether the concrete is a recent pour or has been in place for several years. It is important to evaluate and address moisture issues in your concrete subfloors, as they can adversely affect your floor covering. Floor covering manufacturers of all types generally post the maximum allowable moisture content of the concrete which their flooring products are being installed over. Refer to their installation instructions or warranties. • One of the simplest ways to qualify if the slab is emitting any moisture vapor, and one of the most economical test methods is the ASTM D 4263 Concrete Moisture Test. While it doesn’t quantify how much moisture is emitted it can be a valuable way to understand first if there is moisture present. Duct tape an 18-inch square piece of plastic onto the exposed concrete and leave it for 16 hours. Condensed moisture accumulation under the plastic at 16 hours can indicate a problem. • Another test is the Calcium Chloride Test (ASTM F 1869), available as a kit that you can find commonly at a flooring store or favorite online retailer. By comparing the weight of the calcium chloride before and after the test time (60 to 72 hours), it indicates not just whether moisture is present, but the quantity and rate of moisture vapor traveling upwards through the slab. Kits typically measure the moisture in the top ½ inch or ¾ inch of the concrete slab. Check out our other videos on how to properly use a Calcium Chloride test kit. • The final way to test for moisture quantity in concrete is the Relative Humidity Testing (ASTM F2170) of the slab. This is done via special moisture probes embedded in the concrete substrate. This is the most advanced and comprehensive of the three methods, this test measures the presence and quantity of moisture throughout the depth of the slab. If any of these tests indicate a moisture control problem beyond the flooring manufacturer’s recommendations and is out of the range of the underlayment’s protection, consider hiring a professional flooring contractor who specializes in moisture mitigation. #moisture_protection #concrete #concrete_subfloor #mpglobalproducts