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Hollow Concrete Block with 3 cores, Dimensions 40x20x20 cm, Gray color | Opal Company
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Hollow Concrete Block with 3 cores, Dimensions 40x20x20 cm, Gray color | Opal Company

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Hollow concrete block 3-hole, dimensions 20x20x40 cm, gray color from Opal Company. It has excellent sound, heat and moisture insulation properties, making it suitable for various types of environments. Concrete block is very durable and resistant to weather elements without the need for additional covering

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Product description

Concrete blocks, made by Opal Company, are designed to be practical and easy to use, ensuring fast and efficient construction. They allow for thinner walls, which helps save space and increase usable floor area. These blocks help reduce construction costs by using fewer materials and less mortar due to fewer joints. They also provide great insulation against sound, heat, and moisture, making them suitable for different environments. They are durable and resistant to weather conditions, requiring no extra coverings. They are easy to install, even with unskilled labor, which helps lower labor costs. The rough surface ensures strong bonding with mortar and plaster, creating a solid and stable structure. Available in various shapes and sizes, they meet different construction and design needs.

  • Material: Concrete (Hollow Blocks)
  • Size: 400 × 200 × 200 mm (3 cores)
  • Weight: 17.00 kg 
  • Color: Gray
  • Pieces per Layer: 18 pieces
  • Pieces per Pallet (6 Layers): 108 pieces
  • Length Tolerance: ±3 mm
  • Width Tolerance: ±3 mm
  • Height Tolerance: ±3 mm
  • Compressive Strength (for a single block): Minimum 4.8 N/mm²
  • Compressive Strength (median for 10 blocks): Minimum 6 N/mm²
  • Standard: SASO ASTM C129 / SASO ASTM C90

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Frequently Asked Questions

Prices vary by quantity, city, and delivery fees, and are usually quoted per piece or per 1,000 blocks. On Youmats, you can see clear pricing for the 40x20x20 cm hollow concrete block, compare supplier offers, and choose the best option for projects in Riyadh, Jeddah, or Dammam.
Solid concrete blocks are a general term, while hollow blocks contain cores that reduce weight and improve thermal and sound insulation. The 40x20x20 cm three-core block suits normal walls and partitions, uses less cement and aggregate than solid blocks, and remains durable for Saudi construction.
You typically need about 11 to 12 blocks per square meter when mortar joints are included. The exact count can vary slightly with joint thickness and masonry skill. Add a 5% to 10% spare for cutting or breakage, especially for exterior walls in Saudi heat.
Yes. Hollow cores reduce heat transfer compared with solid blocks, especially when laid carefully with proper mortar. In hot areas such as Riyadh and Dammam, they help lower cooling load. For better performance, combine them with extra insulation layers or select an insulated block system.
For most non-load-bearing walls and normal partitions, the 40x20x20 cm hollow block is common and practical in Saudi Arabia. For load-bearing walls or heavier loads, choose a higher-strength size after engineering review, and confirm compliance with Saudi Standards, Metrology and Quality Organization specifications.