Floor insulation from the crawl space is usually the best way to insulate the floor. You then insulate at the bottom of the ground floor. This saves the most energy, making your home a lot more comfortable. This form of insulation requires sufficient space in the crawl space. This is 35cm under wooden beams and 50cm under concrete floors. Do you not have enough space? Then soil insulation in the crawl space is a good alternative. No crawl space at all? Then you can insulate the floor from the top.
Is my home suitable?
Does your house have a crawl space? Do you see insulation on the underside of the floor? At the bottom of the crawl space? How thick is the insulation? What is the space between the bottom of the floor beams and the bottom of the crawl space?
Does your house have a crawl space that is at least 35 cm high? Then (additional) insulation against the underside of the floor is easy to install. Go for good floor insulation (16 cm, Rc = 3.7).
Don't have a crawl space or is it lower than 35 centimeters? You can also insulate the floor. For example, by insulating the bottom of the crawl space or the floor from above.
In the case of apartments, insulating the floor is the responsibility of the VvE.
What types of floor and bottom insulation are there?
A ground floor is best insulated at the bottom. This is done through the crawl space under the house. In other words: the insulation material then touches the ceiling of the crawl space. The crawl space must be high enough for this. A minimum of 35 cm is required under the beams for a wooden floor. For a concrete floor, 50 cm is required.
+ A more comfortable home
+ Higher savings than soil insulation
+ Less trouble with moisture rising up
- Higher costs than soil insulation
Soil insulation is the application of a layer of insulation material on the floor of the crawl space. Soil insulation is an excellent alternative if floor insulation is not possible. For example, if the crawl space is not deep enough. Or if the crawl space is damp or has a layer of water. Soil insulation is less efficient than floor insulation, but still provides good savings.
+ A more comfortable home
+ Lower costs than floor insulation
+ Works well in damp and shallow crawl spaces
- Lower savings than floor insulation
Floor insulation at the top
Choose this if you don't have a crawl space. A layer of insulating material is placed on the floor under the floor covering. The floor covering (carpet, laminate, tiles) must first be removed for this. If you do have a crawl space, floor insulation or soil insulation are better choices.
+ Insulate, even if you don't have a crawl space
+ Less cold feet in winter
- Little insulation possible
- Lower savings than the floor or bottom insulation
- Carpeting must be removed
- The floor rises a bit, which affects thresholds
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