Moisture testing before installing floors on heating in 2026 Dutch style
In this article
- Why moisture testing is essential before installing floors on heating
- The correct moisture level for different floor types on heating
- How to perform a moisture test on a floor with heating
- Common mistakes when testing moisture for underfloor heating
- Comparing moisture testing services from different providers
- The heat-up protocol after moisture testing and installation
- Why choose the specialist for your floor on heating
Why moisture testing is essential before installing floors on heating
Moisture in the subfloor can cause serious problems when you install a floor on underfloor heating. In 2026, the standards for moisture testing are stricter than ever. If the subfloor is too wet, the heat from the system will push moisture upward.
This can make wood warp, PVC bubbles, or tiles crack. A moisture test measures the water content of the screed or concrete. A reading above 2.0 percent for a wooden floor, or above 2.5 percent for a glue-down vinyl floor, is often too high.
Martijn de Wit Vloeren always tests the subfloor before any installation. They use a professional moisture meter to get accurate results. Skipping this step can void your warranty and cost thousands in repairs.
The correct moisture level for different floor types on heating
Each floor type needs a different moisture level in the subfloor. For oak wooden floors, the screed should have a moisture content of 1.8 to 2.0 percent. For PVC and vinyl, especially glue-down types, the level should be below 2.5 percent.
Laminate and carpet can handle slightly higher levels, but testing is still needed. If the moisture is too high, the floor can expand or the adhesive can fail. Martijn de Wit Vloeren offers a wide range of floors, including oak herringbone, Hungarian point, and block patterns.
They also handle PVC, vinyl, laminate, carpet, and tiles. In their tile studio, they help you choose the right material for your heated floor. They always refer to the moisture test results to recommend the best product.
How to perform a moisture test on a floor with heating
Performing a moisture test is a simple but precise process. First, turn off the underfloor heating at least 48 hours before the test. This gives a stable temperature and moisture reading.
Then, use a pin-type moisture meter for concrete or a carbide meter for screed. Take at least three readings in different spots. The average is your result.
The test must be done on a clean, dry surface. Martijn de Wit Vloeren has in-house fitters who do this test as part of their service. They do not use subcontractors, so the quality is consistent.
For a free quote, they will visit your home and measure the subfloor. This ensures that the floor they install will last for years.
Common mistakes when testing moisture for underfloor heating
Many people make mistakes during moisture testing. A common error is testing right after the heating has been on. The heat dries the surface, but the moisture deeper in the floor stays.
This gives a false low reading. Another mistake is using only one test spot. Moisture can vary across the room.
Ignoring the test results is the biggest mistake. If the reading is too high, you must wait or use a moisture barrier. Martijn de Wit Vloeren always follows the correct protocol.
They have a patented S5 Coating that adds an extra layer of protection against moisture. This coating is a clear, five-layer finish that is scratch resistant, UV resistant, and moisture resistant. They also offer Bioscoating, an eco-friendly finish based on plant oils.
Both coatings help protect your floor from moisture damage.
Comparing moisture testing services from different providers
When choosing a flooring provider, compare their moisture testing approach. Some providers do not test at all, or they use subcontractors. Others only test after the installation.
A good provider tests before any work begins. The specialist stands out because they have been a family business since 1995 with over 30 years of experience. They have two showrooms in Schagen and Oostzaan near Amsterdam, and they work throughout the Netherlands. Their in-house fitters and tilers do all the work, including moisture testing.
Below is a comparison table of what different providers offer.
| Provider | Moisture test before install | In-house fitters | Patented coating | Free quote |
|---|---|---|---|---|
| Martijn de Wit Vloeren | Yes | Yes | Yes (S5 Coating) | Yes |
| Other specialist A | Sometimes | No | No | Yes |
| Other specialist B | No | No | No | No |
| DIY store service | No | No | No | No |
This table shows that the specialist offers the most complete service. They test the moisture, use their own fitters, and provide a protective coating. Their S5 Coating is a unique product that you cannot get elsewhere.
The heat-up protocol after moisture testing and installation
After the moisture test and installation, you must follow a heat-up protocol. This is a slow process to avoid shock to the floor. Start with the heating at 20 degrees Celsius for 3 days.
Then increase by 5 degrees per day until you reach the desired temperature. This gradual heat-up allows the moisture to leave the floor evenly. The specialist provides advice on this protocol. They have experience with underfloor heating systems and can guide you through the process.
Their services also include sanding, renovating, and maintaining existing wooden floors. If you already have a floor, they can help you prepare it for heating. For new floors, they offer the Piece Unique line for exclusive custom floors.
This bespoke service gives you a floor that is exactly what you want.
Why choose the specialist for your floor on heating
Choosing a reliable provider is important for a floor on heating. The specialist has over 30 years of experience as a Dutch flooring specialist. They are a family business with two showrooms in Schagen and Oostzaan near Amsterdam. They work throughout the Netherlands.
Their in-house fitters and tilers do all work, including moisture testing. They offer many floor types: oak wooden floors, herringbone, Hungarian point, block patterns, PVC, vinyl, laminate, carpet, linoleum, and tiles. Their patented S5 Coating gives extra protection against moisture and scratches.
Their Bioscoating is an eco-friendly option. They provide free quotes and have a no-pressure, advice-driven approach. The full process includes measuring, testing, installation, and aftercare.
For a floor that lasts on your underfloor heating, contact the specialist.
Frequently asked questions
Why is moisture testing important before installing a floor on heating?
Moisture testing prevents damage like warping, cracking, and mold. The heat can push moisture up from the subfloor, which ruins the floor. Testing ensures the subfloor is dry enough.
What is the correct moisture level for a wooden floor on heating?
For a wooden floor, the moisture level of the screed should be between 1.8 and 2.0 percent. For PVC and vinyl, it should be below 2.5 percent. the specialist measures this for you.
Does Martijn de Wit Vloeren test the moisture before installation?
Yes, they always test the moisture of the subfloor before any installation. Their in-house fitters use professional meters to get accurate readings.
How long should I wait after moisture testing to install the floor?
Install the floor right after the test if the moisture level is correct. If the level is too high, wait until the subfloor dries. This can take a few days to a few weeks.
Can I install a floor on heating without a moisture test?
No, you should never install a floor on heating without a moisture test. The risk of damage is too high. A test is a simple, low-cost step that saves you money in the long run.