Facade insulation with mineral wool: 2026 price per m² and comparison with EPS

Most family houses in the Czech Republic are insulated with EPS — it is cheap and it works. Mineral wool costs roughly a third more, but it does not burn, it breathes and it dampens noise. For older masonry houses, timber houses and houses next to a road we recommend it almost every time.

What mineral wool insulation costs in 2026

Prices exclude VAT, labour and material included. The difference against EPS is roughly CZK 108,000–126,000 for a house with 180 m² of facade. The full overview of facade work is in our 2026 price list.

When to choose mineral wool over EPS

• Old masonry house without a damp-proof course. Wool is vapour-permeable, so the wall can dry outwards. EPS "locks" moisture in and mould appears inside.
• Timber house or house with timber floors. A diffusion-open build-up is a necessity, not a luxury.
• Fire safety. Wool is non-combustible (class A1). For multi-storey houses and facades closer than 2 m to the plot boundary, codes require it at least in bands.
• Noise. A house by a busy road or railway — thanks to its fibrous structure, wool dampens noise better than EPS.
• Combination. Most often we do EPS with mineral-wool fire bands around windows and above floors — the price stays reasonable and the code is met.

What thickness

For subsidies and a sensible saving count on 140–200 mm. Wool has a lambda of 0.035–0.040 W/mK, slightly worse than grey EPS; for the same saving you need about 2 cm more. How much you save on heating depends on the starting condition of the house, the insulation thickness and the heating system — an energy specialist will calculate the figure for your house.

How installation works and what to watch

1. Substrate survey — pull-off test, moisture, algae treatment.
2. Base rail and adhesive — wool is always bonded over the full surface, not in "dabs" like EPS.
3. Anchoring with plate anchors — mandatory for wool, 6–8 per m²; unanchored wool slides down over time.
4. Reinforcing layer with mesh, corner and window profiles.
5. Silicone or silicate render — only vapour-permeable render belongs on wool; acrylic does not.

We insulate a house with up to 200 m² of facade in 3–4 weeks. We work from April to October, when temperatures stay above 5 °C.

Subsidies and payback

The Nová zelená úsporám Light and standard NZÚ programmes fully support wool insulation (paid per m² insulated, insulant does not matter). Payback cannot honestly be given as one number — it depends on the subsidy, energy prices and how much heat the house actually saves. Work it out from your own heating bills: payback = insulation cost minus subsidy ÷ annual heating saving.

Free tailored quote

We come out, measure the facade, check moisture and tell you whether EPS is enough or wool is a must. The itemised budget is free; get a guide price in the online calculator. For insulation in general see facade insulation: cost and process.