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How (and Why) to Moisture Test Concrete Floors

You may have heard of moisture testing before. If you have, you might have not tested your concrete because you’re not sure where to start. Or, you may have considered doing a moisture test, but long forgotten about it. Either way, Rawlins Paints are here to tell you how and why you should moisture test your concrete floors.


Why bother with moisture testing a concrete floor?

We recommend you always moisture test your concrete surfaces before you lay down any kind of new flooring. If you’re looking to apply vinyl or other flooring material, you really do need to do this first.

If you lay down any kind of flooring and there is too much moisture there, you’ll find you’ll come across serious problems over time. For example, if you try to apply vinyl to a damp, moist surface it will peel and lift, ruining the finished look.


A simple step now will save you time and money before you apply any kind of flooring on top of your concrete. You can then factor in the time it’ll take to dry out the concrete and minimise any damage from moisture (such as spots of damp and mould) or look into applying a damp proof coating to suppress the moisture to allow you to get onto the surface quicker. If you don’t test early on, you’ll be making more work for yourself in the future. Some contractors may refuse to lay down flooring on top of the concrete if there is too much moisture – so it’s important to think about before you start a new project.


How do you moisture test concrete floors?

There are a few methods when it comes to moisture tests, but we recommend you try using the Sika Tramex Moisture Meter. Sika makes it simple for you to test moisture in concrete flooring (and other floor slabs and screeds). It’s fast and precise letting you take multiple tests in big spaces – in the shortest possible time!

To use the moisture meter clean the concrete and brush away any dust on a smooth area. Then, turn the moisture meter on and if you hold it firmly you’ll compress the spring-loaded contacts on the base of the device.

This gives you your reading and allows you to make better judgement on your flooring choices.

Don’t shy away from applying a coating or finishing material to your concrete, just make sure you check it with a moisture test first.

Need help with your readings? Just ask the experts at Rawlins Paints.

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