Technology: Expanded Clay Concrete (LECA Concrete)
Technology: Expanded Clay Concrete (LECA Concrete)
Technical Specification – Domki Marysia
Structural Material:
- Expanded Clay Concrete (LECA concrete) – lightweight concrete with expanded clay aggregate
- Concrete class: C20/25 or C25/30
- Density: 900–1400 kg/m³
- Thermal conductivity: λ = 0.10–0.14 W/mK
Applications:
- Load-bearing external walls (thickness: 20–24 cm)
- Interior load-bearing and partition walls
- Prefabricated in factory, assembled quickly on site
Performance Properties:
- Excellent thermal insulation – can achieve passive standard without additional insulation
- Fire resistance: REI 120
- High thermal mass – stable indoor climate
- Excellent sound insulation – walls reduce noise up to 55 dB
Sustainability & Durability:
- 100% natural material – expanded clay is fired clay aggregate
- Resistant to mold, fungi, pests
- VOC-free – does not emit volatile organic compounds
- Long lifespan – over 80 years
Installation Parameters:
- Suitable for slab or strip foundations
- Prefab wall modules installed in 2–3 working days
- Compatible with flat or pitched roofs
Usage in Domki Marysia:
- Recommended for clients who value durability, energy efficiency, and fast assembly
- Wall modules delivered as ready-to-install panels, with optional plaster or wooden cladding finish
Choose Your Wall System
Which construction technology suits you best?
We offer two proven systems – both with turnkey production and on-site assembly. Each has its own strengths. Here’s a quick comparison:
Feature |
Expanded Clay Concrete (Keramzytobeton) |
Wooden Frame (Timber Frame) |
Durability |
80+ years, extremely solid |
50+ years, lightweight structure |
Thermal Performance |
Very high, thermal mass regulates climate |
Excellent, requires additional insulation |
Fire Resistance |
Very high (REI 120) |
Medium, fire-treated timber |
Sound Insulation |
Excellent (up to 55 dB) |
Moderate, depends on insulation layers |
Installation Speed |
2–3 days |
1–2 days |
Ecological Impact |
Natural + mineral, recyclable |
Renewable material, low CO₂ footprint |
Interior Climate |
Stable, low humidity fluctuations |
Warmer in feel, faster to heat |
Price |
Slightly higher |
More economical |
FAQ – Frequently Asked Questions
Q: Can I build on a slab foundation?
A: Yes. Both systems are compatible with slab or strip foundations. We’ll help adjust the design to your plot.
Q: Is insulation included in the wall modules?
A: Yes. Both systems include integrated insulation (e.g., mineral wool or PIR). U-values depend on the package selected.
Q: Can I customize the exterior finish?
A: Yes. Choose from wooden cladding, plaster, or other finishes. We’ll advise what fits best to your surroundings.
Q: Which system is better for a summer home?
A: Wooden frame is great for seasonal use due to its speed and price. Concrete is better for year-round living and rental.
Q: Can I get a passive-standard house?
A: Yes, especially with the keramzyt system. With the right window and roof package, we can meet EH55 or better.
Q: How does transport and assembly work?
A: We produce the modules in our factory and deliver them by truck. Assembly on site takes a few days – all done by our certified team.
📩 Still not sure which option to choose? Contact us – we’ll help you select the best match for your location, usage and budget.