Chapter 1. Basics of Country House Construction. Frame House or Aerated Concrete: What to Choose in 2026?

Frame vs. Aerated Concrete: What to Choose in 2026 (Leningrad Region)

The question “frame or aerated concrete” is one that everyone planning to build a country house in the Leningrad Region asks themselves. Both options are popular, both have their supporters — and both are suitable for our climate. But, as always, the devil is in the details.

In this article, we will break down both types of houses by key parameters: cost, construction speed, thermal insulation, durability, and operating expenses. No marketing — only facts and figures актуальные for 2026.

Structural Features

A frame house is a wooden or metal frame filled with insulation (mineral wool, eco-wool, PIR boards) and sheathed with sheet materials (OSB, cement particle board, plywood). On the outside — façade finishing; inside — drywall or paneling.

The principle of a frame wall is a multi-layer “sandwich”: each layer performs its own function (load-bearing, insulation, vapor barrier, wind protection). When properly assembled, such a wall provides excellent thermal insulation with minimal thickness.

A house made of aerated concrete is masonry from aerated concrete blocks 300–400 mm thick, laid with special adhesive or foam adhesive. Aerated concrete combines load-bearing capacity with thermal insulation properties. Blocks of density D400–D500 with a thickness of 375–400 mm do not require additional insulation in the conditions of the Leningrad Region.

Construction Costs in 2026

Prices are indicated for the Leningrad Region, for a 100 m² house, in the “warm shell” configuration (foundation, walls, roof, windows, doors, insulation):

A frame house is 15–25% cheaper due to a lighter foundation and lower material consumption. However, the difference decreases if high-quality insulation and façade materials are used.

Construction Timeframes

A frame house — from 45 days to move-in. No wet processes, no shrinkage — finishing can begin immediately. This is the main advantage for those who need to move in quickly.

An aerated concrete house — 4–6 months. Block masonry, installation of monolithic lintels and reinforced belts, time needed for strength gain. Finishing is recommended 1–2 months after masonry completion so the blocks can release moisture.

Thermal Insulation

For the climate of the Leningrad Region (average January temperature –7 to –10 °C, down to –30 °C in extreme cold), thermal resistance of walls is critical. The норматив value for the region is R = 3.08 m²·°C/W.

A 200 mm frame wall with mineral wool insulation (λ = 0.035) provides R ≈ 5.7 — significantly exceeding standards. Frame houses are very warm and energy-efficient.

A wall made of aerated concrete D400 with a thickness of 375 mm (λ = 0.096) provides R ≈ 3.9 — also meets standards, though with less margin. Using D500 blocks or 300 mm thickness may require additional insulation.

Durability and Operation

Hidden Pitfalls

A frame house critically depends on assembly quality. Mistakes in vapor barrier installation lead to insulation moisture and mold. It is important to hire a team experienced specifically in frame construction — not generalists.

An aerated concrete house requires proper reinforcement and reinforced belts. Without them, cracks in the walls are only a matter of time. Also, aerated concrete should not be left without exterior finishing during winter — the blocks absorb moisture.

Which Option Is Right for You

Choose a frame house if:

• Your budget is limited

• You need fast construction (summer season, mortgage deadlines)

• It’s a seasonal or permanent home with a constrained budget

• The plot has weak soils (swampy terrain — common in the Leningrad Region)

Choose aerated concrete if:

• You are building a permanent home for year-round living

• You want a solid, “stone-like” feel

• Your budget allows a more expensive foundation

• You plan to live in the house for 50+ years

Conclusion

In our construction practice in the Leningrad Region, both options perform excellently — provided that technology is followed and quality materials are used.

We build both frame houses starting from 45 days and aerated concrete houses with a full cycle of work.