Luxembourg winters can be harsh: sub-zero temperatures, frost, snow, and persistent humidity. A poorly prepared home risks heating failures, frozen pipes, and excessive energy bills. Here is the complete checklist to face the cold season with confidence.
Complete Checklist: Preparing Your Home Before Winter
| Task | Priority | Estimated Cost |
|---|---|---|
| Boiler servicing | High | €80–150 |
| Check radiators / bleed air | High | €0–50 |
| Seal drafts | High | €10–100 |
| Insulate pipes (lagging) | High | €30–200 |
| Clean gutters and downpipes | Medium | €80–300 |
| Inspect roof / slates | Medium | €0–500 |
| Protect exterior pipes | High | €20–80 |
| Check ventilation (VMC) | Medium | €0–100 |
| Stock de-icing salt / sand | Medium | €20–60 |
1. Heating: Your Absolute Priority
In Luxembourg, annual boiler servicing is legally required under the Grand-Ducal regulation of 3 April 1996. Beyond the legal obligation, regular servicing protects you against breakdowns in the middle of winter.
What to Do with Your Boiler
- Schedule the annual service: book in September–October, before winter sets in (cost: €80–150)
- Bleed radiators: trapped air reduces heating efficiency significantly
- Check circuit pressure: it should read between 1 and 1.5 bar when cold
- Test the thermostat: verify the time-programming before cold weather arrives
- Clean filters: the magnetic filter protects your boiler from sludge deposits
Heat Pumps and Electric Heating
If you have a heat pump, have the external filters and the defrost resistance checked. For electric radiators, test them early and replace any faulty units before the cold arrives (average cost: €150–400).
2. Insulation: Eliminate Drafts
Drafts account for up to 30% of heat loss in a home. Before winter, systematically inspect:
Doors and Windows
- Door seals: replace worn seals (€10–30 per door)
- Door bottom draft excluders: fit brush strips or foam seals where needed (€15–50)
- Window seals: check airtightness and tighten hinges and closers
- Roller shutters: adjust tension to prevent cold air infiltration
Simple Draft Detection Test
On a cold day, hold a damp hand near door and window frames. You will feel drafts immediately. A lit candle works equally well — a flickering flame reveals cold air leaks.
3. Pipes: Preventing Frost Damage
Frozen pipes can cause very serious damage. The cost of repairs after a burst pipe ranges from €500 to €3,000. Essential preventive steps:
- Insulate pipes in unheated areas (cellars, garages, loft spaces): €30–200
- Shut off exterior taps and drain garden hoses completely
- Close the water supply to any unoccupied holiday homes
- Install a heating cable on particularly exposed pipes (€50–200)
- Know the location of your home’s main water shut-off valve
4. Roof and Exterior
A damaged roof can allow water infiltration that is significantly worsened by snow and frost.
- Visually inspect the roof: look for displaced slates or deteriorated ridge tiles
- Clean gutters: leaves and debris prevent proper water drainage (€80–200 per visit)
- Check flashings around chimneys and skylights
- Cut back overhanging branches near the house before storms arrive
5. Ventilation and Air Quality
In winter, homes are more sealed. Humidity and condensation can lead to mould growth. Check:
- VMC filters: replace them (€15–30 per filter) and ensure vents are not obstructed
- Bathroom and kitchen extraction: verify airflow rates
- Ventilate daily: 5–10 minutes is enough, even in winter, to renew indoor air
Find a Heating Engineer on tack.lu
Over 100 qualified heating engineers are listed on tack.lu in Luxembourg.
View available heating engineers →
FAQ
When Should You Start Winter Preparations?
Ideally in September–October, before the first frosts. This gives you enough time to book available tradespeople without paying emergency call-out rates.
What Should You Do If a Pipe Freezes?
Immediately close the main water supply. Never use an open flame to thaw a pipe — this risks fire and explosion. Use a hairdryer or a heating cable and call a plumber if necessary.
Does the Klimabonus Cover Insulation Work Against the Cold?
Yes. Loft insulation, wall insulation, floor insulation, and window replacement can all benefit from the Klimabonus 2026. Aid rates vary depending on the type of work and household income.
