What to choose for building your own house: gas block (aerated concrete) or ceramic block?
This is quite a relevant question, and our article will help you find the answer. Both materials are suitable for constructing low-rise buildings. They are practical, durable, comfortable, and wear-resistant. But which one is worth the investment? To find out, we need to review their general characteristics. Ultimately, everyone must decide individually which option is best for them.
Wear resistance of ceramic blocks and gas blocks
Ceramic block is one of the most eco-friendly materials. Its composition is entirely natural and includes sawdust, water, and clay. Gas blocks, on the other hand, are manufactured synthetically. In factories, specialists use sand, lime, aluminum powder, and cement. Because of this, their wear resistance characteristics differ.
One of the most important comparison indicators is compressive strength. This determines how much load the selected material can handle during construction and over long-term use. Manufacturers usually indicate this with a special marking. Depending on its specific properties, aerated concrete can withstand from 35 to 50 kg per square meter, marked as M35–M50. If a higher rating is needed, ceramic block is the clear choice. Its parameters range from 75 to 150 kg per m². That’s nearly double. Another factor to consider is compressive stress resistance. For gas blocks, this is from 1 to 5 MPa, while ceramic blocks range from 10 to 15 MPa.
Weight also plays a role in wear resistance. Statistically, ceramic blocks are about twice as light as their gas-silicate counterparts. So, if you’re looking for a safe way to save money, consider the foundation — lighter materials require a less expensive foundation option.
Both materials are resistant to extreme high and low temperatures. Another plus is UV protection. Even continuous exposure does not alter the materials’ natural or factory-set characteristics.
Maximum comfort is guaranteed if installation is done correctly and if the product is protected from potential high humidity. Both ceramic and aerated concrete blocks absorb and repel water — and that’s perfectly normal. They retain warmth in winter and stay cool in summer. To maintain this effect, you simply need to add a protective layer of mineral wool or polypropylene so the surface isn’t affected by high moisture levels.
Performance qualities of the materials
Ceramic blocks and gas blocks are considered biologically stable. They are chemically inert, so there’s no need to worry about mold or fungus. These materials are non-toxic and allergen-free, making them safe for use in residential spaces.
Thermal insulation benefits of ceramic blocks:
- Low thermal conductivity
- Easy to work with
- Long-lasting
- Maintains a comfortable indoor microclimate
The lower the thermal conductivity, the easier it is to heat the building in winter — and the better it retains heat. Materials like ceramic or gas blocks keep warmth inside for longer. As a result, you’ll save significantly on heating and utilities overall. Both types are classified as “warm” materials and have nearly the same average thermal conductivity. So you can choose either based on your available budget.
Another important characteristic is vapor permeability — the material’s ability to “breathe.” No structure is ever completely static or sealed off. The building always interacts with the external environment, which affects the indoor climate. Some areas can feel stuffy, while others are pleasant. It all depends on the material used. Like with thermal conductivity, both of these materials have similar vapor permeability. However, keep in mind that gas blocks vary in density — if you go with a denser model, it may hinder breathability.
Water absorption should also be considered
Water absorption refers to the material’s ability to absorb moisture — not just liquid water, but also air humidity through condensation. This characteristic is especially important when choosing construction material for siding or outer walls. Not every material is designed to withstand constant atmospheric exposure.
Experts say that aerated concrete absorbs about 8–15% of its weight in water. However, it releases moisture very slowly. This can lead to drying challenges, requiring extra time and special equipment. Ceramic blocks absorb between 7–14%.
Advantages of ceramic blocks:
- Porous structure
- Quick drying
- Easily releases moisture
- Resistant to mold
If you’re aiming to live in a comfortable environment without issues like mold or harmful health effects, ceramic blocks are the better choice. They offer excellent heat retention and won’t require you to overpay for heating. Plus, you won’t need to regularly treat the walls with special compounds to improve waterproofing.
Conclusion: which material is better?
It’s difficult to say which building material wins in this comparison. Many characteristics are similar, while some differ depending on specific properties. First, define the key parameters that matter most for your project. Then you can consider your budget, durability, and installation method. This will help you understand which material is the smarter investment.
Don’t forget to take into account vapor permeability, sound insulation, and thermal conductivity — these are essential for a truly comfortable house. Always consider not only how much moisture the material absorbs, but also how well it releases it.