Winter temperatures in Siberia reach -40…-50°C, the heating season lasts 7–8 months. The thermal insulation properties of wall material directly determine heating costs and living comfort. AAC/ALC is gaining increasing popularity in Siberian construction — and here is why.
Thermal comparison. Thermal conductivity coefficient: AAC — 0.09–0.16 W/m·K, brick — 0.7–0.8, concrete — 1.5. In the Siberian climate (heating degree days 5000–6000), to achieve the same heat transfer resistance: brickwork requires 770 mm (2.5 bricks), AAC only 300–400 mm. This means thinner and lighter walls, a smaller foundation, and more usable area.
Frost resistance. Thanks to autoclave treatment, AAC hydration products are stable, frost resistance grade reaches F100–F150 (100–150 freeze-thaw cycles). In real Siberian projects, AAC exterior walls serve 20–30 years without visible frost damage. Key condition: exterior walls must have water-repellent finishing (tile or render) to prevent moisture penetration.
Construction season. Traditional brick masonry below +5°C requires winter measures (anti-freeze additives, heating), increasing cost. AAC block masonry on special adhesive (thin joint 3–5 mm) is possible from +5°C. ALC panels are installed dry at temperatures down to -10°C (as long as adhesive does not freeze), effectively extending the construction season in Siberia by 1–2 months.
Heating energy consumption. In Siberian homes, heating accounts for 60–70% of total building energy consumption. Buildings with AAC/ALC exterior walls consume 30–40% less heat compared to traditional brick buildings. For residents, this means a reduction in monthly heating bills of more than 30%.
Real projects. In Novosibirsk, Krasnoyarsk, Irkutsk and other Siberian cities, large residential projects with mass use of AAC blocks have already been implemented. For example, the 'European Embankment' residential complex in Novosibirsk fully uses AAC exterior walls. Residents report uniform indoor temperature in winter, no cold bridges, and significantly lower heating bills compared to neighboring brick houses.
Recommendations for Siberia. (1) Exterior walls must have external insulation or thickness of at least 400 mm; (2) All window and door openings require thermal insulation treatment to prevent cold bridges; (3) The foundation must have protection against soil frost heaving; (4) Choose blocks with density of at least 500 kg/m³ to guarantee strength and frost resistance.
