Tips Before Starting Concrete and Foundation Works

Rebar quality and volume: The stability of the foundation and columns depends heavily on the correct selection of rebar. Use only certified, deformed (periodical profile) reinforcing steel. Strictly follow the rebar tying pitch (frequency) and bar diameters specified in the structural engineer's blueprints. Strict control of concrete grade: For the load-bearing structures of both private houses and apartment buildings, use only factory-mixed concrete — standardly $B_{25}$ ($M_{350}$) or a higher grade. Demand laboratory concrete test cubes (samples) during every pour to officially verify its compressive strength after 28 days.Use of concrete cover (spacers): A free space of 3–5 cm must be left between the rebar and the outer edge of the formwork (shuttering) for the concrete to flow into. Special plastic spacers (often called chairs or wheel spacers) are used for this purpose. This protects the rebar from air and moisture, preventing corrosion (rusting).Mandatory vibration: It is absolutely essential to use an immersion (poker) vibrator while pouring concrete. Vibration expels air pockets and distributes the mixture evenly within the formwork. Without a vibrator, voids (honeycombs) will form inside the concrete, catastrophically reducing the structural integrity.Curing concrete after the pour: Concrete works do not end with the pour. For the first 3–7 days — especially in hot weather — concrete needs periodic watering and coverage with plastic sheeting to prevent rapid moisture evaporation and surface cracking.💡 A solid foundation for your home: Find certified structural engineers, experienced concrete pouring crews, and formwork masters on the platform: services.ss.ge