Research results: insulation | ground-floor floors
- Commissie Duurzaam
- 30 jan
- 2 minuten om te lezen
Bijgewerkt op: 5 feb
Table of contents of insulation
Current situation
The ground floor is not insulated on the underside (in the crawl space);
During the renovation in 2013, no hatches to a crawl space were installed;
In 2018/2019, several apartments experienced sewer blockages. These were caused by a subsiding sewer pipe. To repair this, hatches to the crawl spaces were installed in several apartments.
the crawl space is 1.10 meters high.
Opportunities for improvement
As a proposal, 2 options are explained:
Option 1. PUR on the underside of the ground floor
After research, it has been calculated that a 13 cm thick PUR foam on the underside of the ground floor will provide an Rc value of 3.5 m2/Kw.
Option 2. Thermal cushions
After research, it has been calculated that hanging thermal cushions on the underside of the ground floor will yield an Rc value of approximately 3.8 m2/Kw.
For apartments without a hatch to the crawl space, a hatch could be installed in the terrace outside under the balconies of higher floors to prevent damage to underfloor heating and/or floor coverings.
Costs, subsidy and National Heat Fund
Costs
Thermal cushions, including installation and base foil, cost an average of €38-€50 per m² (incl. VAT), with lower prices for larger areas, such as €45 per m² for 61-100 m².
Subsidy
Subsidies can be requested via the SVVE (for VvE's) for energy-saving measures, including insulation of the ground floor floors. The conditions are that
the new insulation material has a minimum thermal resistance of 3.5 Rc;
70% of the entire floor of the building is insulated.
the subsidy amounts to:
for one insulation measure: €5.50 per m2;
for two or more insulation measures: €11 per m2.
To borrow
The floor insulation can be further financed by a loan from the National Heat Fund.
Read all about saving, borrowing and subsidies here .
Marginal note
In some cases, applying floor or ground insulation increases the thermal bridge effect of the structure, resulting in an increased risk of moisture problems. This risk can be mitigated with thermal cushions combined with a good, continuous ground sheet. However, in very damp crawl spaces (regular flooding, leaks), thermal bridges and condensation can still occur, even with a properly installed system.
Want to read more about insulation?
Do you have any questions, ideas or would you like to share your experiences?
Email us at duurzaamkleiburg1@gmail.com . Together we'll chart a path toward a future-proof Kleiburg.