Concrete Moisture Testing By Concrete Fusion

Water is a vital ingredient in all concrete, but too much can cause problems, including damaging or destroying flooring. Concrete Fusion tests moisture levels using the latest techniques and tools to ensure your floors last as long as possible.

What’s The Problem With Moisture In Concrete? 

High moisture levels in a concrete slab cause critical damage to flooring placed on top of it. Testing the moisture content of your concrete ensures that the new flooring will last a long time without problems.

Concrete is susceptible to moisture issues due to the network of capillaries that forms during the hardening phase. The number of these channels can vary greatly depending on the water-to-cement ratio used in the mix. 

Common problems you might see if there’s too much moisture in your concrete are:

• Blisters
• Bubbling
• Delamination/Glue Failure
• Warps & Waves
• Crazing
• Scaling
• Pop-ups
• Efflorescence
• Discolouration
• Gaps
• Cracks
• Swelling Joints
• Mould 

Moisture Testing Types

Concrete Fusion is a certified moisture tester, employing the latest tools and techniques to guarantee accurate results. The moisture tests we offer include: 

MVER – ASTM F1869: Standard Test Method for Measuring Moisture Vapor Emission Rate of Concrete Subfloor Using Anhydrous Calcium Chloride

This method provides data on the amount of moisture emitted from the concrete surface. The test involves placing a container of calcium chloride on the concrete surface, which is then covered with a plastic dome to create a sealed environment for 60 to 72 hours. During this time, moisture from the concrete is absorbed into the calcium chloride.

Technicians then calculate the amount of absorbed moisture by comparing the weight of the calcium chloride before and after the test. Results are reported in pounds of vapour per 1,000 square feet of concrete over 24 hours. Sensitive flooring types should not exceed three pounds per 1,000 sq. ft., while more durable flooring can tolerate up to eight or more pounds per 1,000 sq. ft.

RH – ASTM F2170: Standard Test Method for Determining Relative Humidity in Concrete Floor Slabs Using In-Situ Probes

This method measures the moisture levels throughout the entire concrete slab, not just the surface. It is widely recognized by flooring manufacturers for warranty purposes.

In this test, a hole is drilled into the concrete slab, and a probe is inserted to measure the relative humidity within the hole. The test requires a minimum of 24 hours to obtain accurate results.

pH Testing – ASTM F710: Standard Practice for Preparing Concrete Floors to Receive Resilient Flooring

The pH level of the concrete can impact the performance of flooring adhesives, especially if it is too acidic or alkaline. Testing the pH ensures compliance with the flooring manufacturer’s guidelines and helps prevent costly failures.

One-Stop For Moisture Testing & Flooring

We’re one of the few certified moisture testers in Canada that also installs various flooring types. This gives us unique insight into creating the best floor for your space.

Contact Concrete Fusion now to learn more!