Cost house insulation
House insulation costs 2026
Insulating your home costs on average between €450 and €8,300, depending on the type of insulation you choose. House insulation ensures that heat is better retained in the winter and coolness in the summer, resulting in more comfort and lower energy costs. The costs for home insulation are mainly determined by the surface area to be insulated, the type of material, and the insulation price per m². In this price guide, you can read about the costs of insulating your home and what to look out for when making your choice.
Table of Contents
- What does it cost to insulate a house?
- Insulation costs by property type
- Price-determining factors for insulating a house
- Extra costs and surcharges for insulation
- How does the professional work when insulating a house?
- How can you save on insulating your house?
- Common insulation problems and causes
- Find the best professional for insulating your house
- Frequently asked questions about house insulation
- Book a professional for insulating your house
- Useful links
What does it cost to insulate a house?
Insulating your home costs on average €2,000 for standard cavity wall insulation up to €8,300 for facade insulation of a corner house. The total costs for insulating a house depend on the type of insulation you choose, the surface to be insulated, and the complexity of the task. Below you will find an overview of what you can expect in terms of home insulation costs.
Total house insulation costs per insulation type
| Type of insulation | Costs (project) |
|---|---|
| Floor insulation | €1,950 - €2,600 |
| Roof insulation | €5,200 - €5,850 |
| Cavity wall insulation | €2,000 |
| Glass insulation | €3,500 |
| Facade insulation (corner house) | €8,300 |
These project prices provide a realistic picture of the total investment per insulation type. Cavity wall insulation is often the most affordable option because it is relatively quick to implement, while facade insulation carries the highest costs due to material usage and labour intensity.
Insulation costs per square metre
| Type of insulation | Costs per m² |
|---|---|
| Roof insulation | €15 - €90 |
| Cavity wall insulation | €13 - €40 |
| Floor insulation | €20 - €50 |
| Facade insulation | €25 - €150 |
| Shed insulation | €25 |
The insulation price per m² varies per type and depends on the chosen material and the thickness of the insulation. Facade insulation has the largest price range because various materials and finishes are possible, from simple insulation boards to high-quality front facades.
All mentioned prices include 21% VAT and labour. The professional performing the job can provide you with a suitable quote based on your specific situation and the desired insulation value.
Insulation costs by property type
The costs for insulating a house strongly depend on the type of property and the surface area to be insulated. A detached house is more expensive to insulate than a flat or terraced house, simply because there is more surface area to insulate. Below you can see what different types of insulation cost per property type.
Cavity wall insulation costs per property type
| Property type | Costs |
|---|---|
| Insulating a flat | €450 |
| Terraced house | €1,000 |
| Corner house | €1,550 |
| Semi-detached house | €1,750 |
| Detached house | €3,900 |
Roof insulation costs per property type
| Property type | Costs |
|---|---|
| Terraced house roof insulation | €900 |
| Semi-detached house roof insulation | €1,250 |
| Small detached house roof insulation | €1,550 |
| Large detached house roof insulation | €2,750 |
Floor insulation costs per property type
| Property type | Costs |
|---|---|
| Insulating a flat | €1,600 |
| Terraced house floor insulation | €1,650 |
| Corner house floor insulation | €1,800 |
| Semi-detached house floor insulation | €1,600 |
| Detached house floor insulation | €4,600 |
Insulation material costs per m²
| Material | Costs per m² |
|---|---|
| Glass wool | €7 - €13 |
| Stone wool | €7 - €13 |
| PUR insulation | €33 - €46 |
| PIR insulation | €7 - €18 |
| EPS | €11 |
Price-determining factors for insulating a house
The costs for insulating a house vary by situation. What one customer pays may differ from what you pay, even if it concerns the same type of insulation. This is because several factors influence the final price. Below you can read which aspects determine the costs for home insulation and how they relate to each other.
Surface area
The larger the surface area to be insulated, the more material and labour time are required. A detached house has more exterior walls and roof surface than a terraced house, resulting in higher total costs. The difference lies not only in the square metres but also in the number of surfaces to be insulated.
Type of insulation
The chosen form of insulation directly influences the costs. Cavity wall insulation requires less labour than facade insulation because the material is blown into the existing cavity. Facade insulation, on the other hand, requires a structure on the outside, which costs more time and material.
RC value
The RC value expresses how well insulating material blocks heat. A higher RC value means better insulation but requires thicker or higher quality material. This increases both material costs and sometimes labour, as thicker layers are more complex to install.
Insulation material
The choice of material determines a large part of the price per square metre. Glass wool and stone wool are affordable, while PUR insulation can cost up to €46 per m². The choice depends on the desired insulation value, available space, and budget.
Property type and year of construction
Older homes sometimes lack a cavity or require preparatory repair work on the structure. The costs for insulating an old house may therefore be higher because moisture problems or structural defects must first be resolved before insulation is possible.
Accessibility
Difficult-to-reach places such as narrow crawl spaces or steep attics require more effort from the professional. This translates into extra labour time and possibly specialist tools, which increases costs.
Complexity of the task
Complex situations such as irregular constructions, existing pipes, or limited workspace make the work more time-consuming. The more challenges the professional encounters, the longer the execution takes and the higher the labour costs rise.
Preparatory work
Removing old, damaged insulation or solving moisture problems must happen before new insulation can be applied. This preliminary work costs extra time and increases the total investment, but is necessary for a durable result.
Ventilation
A well-insulated house becomes more airtight, which can cause moisture build-up without adequate ventilation. If mechanical ventilation needs to be installed or adjusted, this is in addition to the home insulation costs.
Region
In urban areas, labour rates are often higher than in rural regions. This difference stems from higher costs of living and demand for professionals, which reflects in the final price.
Emergency vs. scheduled
Emergency tasks disrupt the professional's planning, resulting in a surcharge. Scheduled work is more economical as it can be fitted more efficiently into the work schedule.
Weekend or weekdays
Work on weekends usually carries surcharges. Weekday execution is cheaper and provides the same quality.
Practical tips to manage costs
Do not delay addressing problems. Tackling small defects early prevents larger, more expensive repairs later. Ensure the workspace is easily accessible and tidy; this saves the professional time and you money. Choose a local professional who can be on-site quickly without long travel times.
Extra costs and surcharges for insulation
Extra costs depend on the specific situation in your home. At Zoofy, you do not pay call-out charges.
- Emergency jobs often carry a surcharge because the professional must adjust their schedule
- Work on weekends is more expensive than during the week
- Removing old or damaged insulation increases the costs
- Repair of moisture problems or cracks in the structure may be necessary for a durable result
- Adjustments to the ventilation system prevent condensation and mould after insulation
- Extra finishing such as plasterwork after facade insulation is sometimes necessary
- Asbestos removal in older homes requires specialist work
How does the professional work when insulating a house?
Insulating your house follows a set procedure where the professional inspects, prepares, insulates, and finishes the space.
- Inspection and advice: The professional inspects the home to determine which type of insulation best fits your situation. He examines the structure, measures the cavity width, and checks for moisture problems or cracks that must be resolved first.
- Preparation: The workspace is prepared. For cavity wall insulation, small holes are drilled in the facade. For roof or floor insulation, the attic, roof, or crawl space is made accessible. Ensure the workspace is clear and reachable.
- Applying insulation: The insulation material is applied. For cavity wall insulation, insulation foam or beads are blown into the cavity. For roof or floor insulation, boards or mats are placed.
- Finishing: Holes are sealed, and the insulation is finished with vapour-barrier foil or finishing boards, depending on the type of insulation.
- Check and delivery: The professional checks if the insulation is correctly applied and tidies the workspace. Cavity wall insulation takes on average half a day to a full day, while roof or floor insulation can take one to several days.
How can you save on insulating your house?
There are several ways to lower the costs of insulating your home without compromising on quality.
- Combine insulation projects: Carry out multiple types of insulation at the same time, such as roof and cavity. This saves labour time and ensures lower total costs.
- Apply for subsidies: The ISDE subsidy and municipal schemes can significantly reduce your investment. Inquire in advance about the conditions and application deadlines.
- Plan in the low season: Book during the week and not as an emergency. This avoids surcharges.
- Good preparation: Ensure the workspace is clear and accessible so the professional can start immediately without extra preparation time.
- Check your home beforehand: Check for moisture problems that must be solved first. This prevents more expensive repair work later.
- Book via Zoofy: You get a fixed rate in advance, without call-out charges and without surprises. You only pay after the completion of the job.
Common insulation problems and causes
Problems after insulation usually arise from incomplete execution or insufficient ventilation.
Condensation and moisture problems
Arise from insufficient ventilation after insulation. You recognise this by moisture on windows and mould formation in corners. A better-insulated house becomes more airtight, making it harder for moisture to escape. This increases the risk of an unhealthy indoor climate and can lead to structural damage.
Thermal bridges
Spaces where insulation is incompletely applied, allowing heat to escape. You feel cold spots on walls and notice that your heating costs remain higher than expected. Thermal bridges occur more often in older homes because the construction is often irregular. This significantly reduces the insulation efficiency.
Find the best professional for insulating your house
A reliable insulation professional prevents moisture problems and thermal bridges, ensuring your investment yields optimal returns.
- BRL certification: Check if the professional has BRL certification for cavity wall insulation. This guarantees that the job is performed according to applicable quality standards.
- Record guarantees: Ask about guarantees on material and labour and make clear written agreements in advance. This prevents lack of clarity about responsibilities if problems arise later.
- No call-out charges: At Zoofy, you never pay extra for the professional's arrival, only for the work performed.
- Fixed price in advance: You know exactly what the costs are before the job begins, without surprises afterwards.
- Quick booking without quote hassle: Book a slot directly without long waits, ideal if you want to get started quickly.
- Payment via QR code: You only pay after completion of the job, when you are satisfied with the result.
- Verified professionals: All affiliated insulation professionals are thoroughly screened for competence and reliability.
Frequently asked questions about house insulation
How long does it take to insulate a house?
Cavity wall insulation takes half a day to a full day. Roof or floor insulation takes one to several days, depending on the surface and property type.
Can I stay in my house during insulation work?
Yes, in most cases, you can just stay at home. For larger projects, there may be disturbance from dust or noise, but the professional ensures the impact remains as limited as possible.
What is the lifespan of insulation material?
Most insulation materials last 25 to 50 years, provided they are correctly applied and maintained. Glass wool, stone wool, and PUR insulation are among the most durable options.
Do I need a building permit for insulation?
For interior insulation, usually not. For facade insulation on the outside, a permit may be required. Always check this in advance with your municipality.
How quickly do I recoup the costs of home insulation?
On average, you earn back the investment within 5 to 10 years through lower energy costs. Cavity wall insulation saves an average of €950 per year in heating costs.
What does floor insulation cost per m²?
Floor insulation costs on average €20 to €50 per m², depending on the material and thickness. This makes it one of the most affordable ways to insulate your home.
What are signs that my insulation is outdated?
Cold walls, high heating costs, moisture on windows, and large temperature differences between rooms indicate insulation problems. Outdated insulation costs you hundreds of euros extra annually.
Is insulation also suitable for monumental buildings?
Yes, but special rules often apply to preserve the original character. Consult with your municipality and choose a specialized professional for this type of work.
Does insulation improve my energy label?
Yes, good insulation can improve your energy label by several steps, for example from D to B. This increases the property value and significantly lowers your monthly energy bill.
What subsidies are available for insulation?
The ISDE subsidy and various municipal subsidies can significantly lower the costs of fully insulating your house. Check the conditions and application procedure beforehand with RVO or your municipality.
Book a professional for insulating your house
Ready to have your house insulated? At Zoofy, you book a professional directly, without quotes and without call-out charges. You see exactly what it costs in advance, and Zoofy connects you with a reliable, verified professional. You only pay once the work is done. Book a professional directly.