Floor insulation costs: what do you pay per m²?

Floor insulation costs by method

The most common method is insulating from the crawl space. Insulation boards are fixed to the underside of the floor, or PUR foam is sprayed on. If the crawl space is too low to work in, insulating material such as shells or granules can be laid on the ground. If there is no crawl space, the floor can only be insulated from above.

The indications below are per m², including VAT, for a house with an accessible crawl space.

• Insulation boards under the floor: roughly €25 to €45 per m²
• Sprayed PUR foam: roughly €25 to €50 per m²
• Ground insulation with shells or granules: roughly €20 to €35 per m²
• From above with a new floor: roughly €60 to €120 per m²

VAT and grants for floor insulation

For insulating homes older than two years, the reduced VAT rate of 9% on labour generally applies. Materials remain at 21% VAT. If in doubt, ask how this will appear on the invoice. In addition, the ISDE grant from the RVO may apply to floor insulation if you own the home.

We deliberately do not mention amounts or exact conditions here, because they change. Check the current rules on rvo.nl before you place an order. An explanation can be found under ISDE grant for insulation and grants for renovation.

• 9% VAT on labour for homes older than two years
• 21% VAT on the insulation material
• ISDE grant possible for homeowners
• Always check the current conditions on rvo.nl

What determines the price of floor insulation?

The height of the crawl space is the first question. To work properly, around 35 to 40 centimetres is generally needed. If it is lower, or if there is water in the crawl space, it becomes harder and sometimes more expensive. Pipes and joists under the floor also determine how smoothly the work goes.

If the floor is being opened up anyway, for example for a floor renovation or underfloor heating, insulating from above is a logical step. It costs more per m², but you tackle everything in one go. The methods are explained in insulating a floor.

• Height and accessibility of the crawl space
• Damp or water in the crawl space
• Desired insulation value and thickness
• Pipes and joists under the floor

Insulating a floor with Daal Constructions

One job that started with floor insulation grew into the whole ground floor: walls plastered, ceiling insulated and plastered, underfloor heating, tiles and a door moved. That happens more often. If the floor is open anyway, it is a good moment to do more. In our project with an insulated garage good insulation was also the core of the job.

We do not publish fixed prices. Shahiro Daal looks in the crawl space, advises on the method and puts everything in a tailored quote. More about the service under floor renovation and insulation. If you also want to tackle the walls, read insulating interior walls. We work from Zwolle and the surrounding area.

Frequently asked questions