• Facebook
  • LinkedIN

  Nationwide Industrial Concrete Flooring Contractors & Concrete Finishing Specialists

Back Protecting Concrete Floors against Humidity


While Concrete Floors are generally very durable, one thing they are susceptible to is moisture and humidity. Mildew, mould, and even fragmentation or cracking are just a few problems that can result from excess moisture that’s found in concrete.

Here are several steps you can take to ensure your floor lasts as long as possible without any serious issues:

1. Ensure Proper Construction

If the appropriate concrete mixture is not used, the concrete might be subject to delamination, peeling, sweating, staining, blistering, and more. The type of concrete used should be air-entrenched with the following specifications: a 28-day minimum compressive strength of 3,000 psi, a maximum slump of 5 inches, and a minimum cement content value of 520 pounds per cubic yard. A vapour retarder can be used underneath the slab.

Also, an impermeable water barrier of polyethylene film, polyethylene-coated craft paper or glass-reinforced waterproof paper that are extrusion coated on both sides with polyethylene can be set on the rock and gravel before placing the concrete. Additionally, using concrete that is low in water to concrete mixture ratio reduces shrinkage as it dries, leaving fewer vacuous spaces in the process.

Finally, ensure that the curing process takes place at a temperature of no less than 10°C for approximately seven days in cooler weather and five days in warmer conditions.

2. Insulate, Insulate, Insulate!
Use insulating aggregate, which is warmer and reduces condensation. Provide continuous insulation in perimeter walls, crawl spaces, footings and even under the floor slab with extruded polystyrene, hard fiberglass, or urethane foam. Constructing an additional floor as well as installing carpeting also acts as further insulation.


3. Regulate Relative Humidity

Relative humidity measures the humidity in the slab as a function of depth, and is an accurate read of equilibrium moisture level. An acceptable level in the upper centimetre of slab hovers around no more than 85%. Denser slabs with applied sealers and no vapour retardation should not be above 95% relative humidity.

Control humidity by finding ways to ventilate basement areas that are prone to the build up of moisture. Circulate air with fans, install dehumidifiers, heating and cooling systems and open windows and doors to effectively reduce moisture.


Contact our concrete contractors

We are the leading concrete flooring contractors in the UK, offering outstanding concrete finishing results with every project. For more information about our services, contact our team today on 01590 676 585.

This site uses some unobtrusive cookies to store information on your computer. By using our site you accept our Terms And Conditions and Privacy Policy. ×