Rubber Flooring Moisture Test

Test For Moisture Before Installing Rubber Flooring

It is always recommended to complete a rubber flooring moisture test before installing your new floor. It does not matter how old a concrete slab or floor may be. Nor, does it matter what elevation it is or where it is located. All concrete slabs emit some degree of moisture showing up in the form of vapor. Moisture that is trapped under hard surface floors or coatings can change concrete chemistry and create failures in the new rubber flooring. Often these failures do not manifest themselves initially, but it may take several weeks, months or years to show up.

How serious are concrete slabs with moisture issues?

Too much moisture in a concrete slab can cause the adhesive to become wet and start to loosen. This may show up in seams that are lifting or areas that begin showing a bubbling effect in the rubber flooring. These are referred to as Flooring Failures. A few simple steps are necessary before the rubber flooring is installed over a concrete slab. This can ensure that your rubber flooring will not fail and your floor will look great for years.

Another problem regarding moisture is mold. Growth of molds can cause allergic and toxic conditions in both people and pets. Therefore; make sure your concrete sub floor is not emitting too much moisture vapor. If you suspect your floor is trapping mold, you should immediately call for professional help.

How do I test for Moisture Vapor in my floor?

By conducting a simple Calcium Chloride test before you install your flooring, you can ensure that your flooring’s moisture vapor is within acceptable ranges which will allow you to pass the Rubber Flooring Moisture Test.

What is a Calcium Chloride Test?

The calcium chloride vapor emission test was developed many years ago to determine the amount of moisture vapor radiating from a concrete slab surface over a determined period of time.

This test is widely used by the Floor Covering Industry as the primary measure of moisture acceptability for the entire floor covering industry.

Use this test to determine the amount of moisture that emits from a 1000 square feet of concrete slab surface in 24 hours. The test results are expressed in “pounds” which is the amount of the weight of the water which is emitted as vapor over the same 1000 square feet in a 24 hour period.

What do I do with the results?

The results of this test will determine if you need to either wait longer or if you may need to seal the floor prior to your installation. If the moisture content is high you will almost always be guaranteed a flooring failure.

For existing floors most of the time the slab will be fine and nothing more will need to be done. Be especially careful if your previous flooring was lifting, bubbling or curling. These are all signs of a moisture problem. You should always conduct a simple moisture test when going over new concrete or recently cured concrete.

What is the acceptable range?

Most adhesive manufactures will tell you that 3 pounds per 1000 is as high as you should go. E Grip however, is rated at 5 pound per 1000 so you can use this adhesive with a slab that does have higher moisture content.

Where do I get a calcium chloride test?

You can order them through us or almost any local flooring supply store.

Most installers will gladly provide a test for you at a nominal fee.

The Calcium Chloride Test is just another simple step to ensuring your rubber flooring is installed properly and that your cement slab will pass the rubber flooring moisture test.

If you have any questions about this test or would like us to help you through it, call us 800-279-1693.