Concrete Blocks | Blocks | Concrete

At Build4Less, we offer a premium selection of concrete blocks designed to meet the diverse needs of modern construction projects. Whether you're undertaking a residential build, commercial development, or renovation, our range of concrete blocks ensures strength, durability, and efficiency.

What are Concrete Blocks?

Concrete blocks, also known as concrete masonry units (CMUs), are precast rectangular blocks made from a mixture of cement, aggregate (such as sand or gravel), and water. These blocks are widely used in construction for building walls, partitions, and other structural elements.

Concrete blocks come in various sizes, shapes, and types to suit different construction needs. The most common type is the hollow concrete block, which has one or more hollow cores running through its length. These hollow cores reduce the weight of the block while maintaining its strength.

Explore Our Range of Concrete Blocks

Hollow Dense Concrete Blocks (7.3N) – 215mm x 440mm x 215mm

Ideal for load-bearing applications, these blocks combine strength with reduced weight. Their hollow design allows for easy handling and improved insulation. Suitable for external walls, cavity walls, and partitions, they offer excellent fire resistance and sound insulation. 

Solid Dense Concrete Blocks (7.3N) – 100mm & 140mm Thicknesses

These robust blocks are perfect for structural walls, foundations, and retaining walls. Their solid composition ensures high load-bearing capacity, making them suitable for both internal and external applications. 

Medium Dense Concrete Blocks (7.3N) – 140mm x 440mm x 215mm

Striking a balance between strength and weight, these blocks are versatile for various construction needs. They are compatible with secondary insulation and offer good thermal and acoustic properties. 

Standard Aerated Concrete Blocks (3.6N & 7.3N) – 100mm x 440mm x 215mm

Lightweight and easy to handle, aerated blocks provide excellent thermal insulation. The 3.6N variant is suitable for non-load-bearing walls, while the 7.3N version caters to structural applications up to three storeys.

Concrete blocks offer several advantages:

• Strength and Durability: Concrete blocks are strong and durable, providing structural stability and longevity to buildings.
• Fire Resistance: Concrete blocks have excellent fire-resistant properties, making them suitable for fire-rated walls and structures.
• Sound Insulation: The density of concrete blocks helps in reducing sound transmission, providing sound insulation benefits.
• Thermal Insulation: Concrete blocks with insulating properties can help improve thermal efficiency and reduce energy consumption.
• Versatility: Concrete blocks can be used for load-bearing walls, non-load-bearing walls, and as infill material in framed structures.
• Speed of Construction: Concrete blocks are precast and readily available, allowing for faster construction compared to traditional brickwork.
• Design Flexibility: Concrete blocks can be easily modified or adapted during construction to accommodate openings, electrical conduits, and plumbing.
• Cost-Effective: Concrete blocks are generally cost-effective, especially when considering their durability and low maintenance requirements.

It's important to note that the quality and characteristics of concrete blocks can vary based on manufacturing processes, local building codes, and regional standards. Therefore, it's recommended to consult with professionals or refer to specific guidelines for the appropriate use of concrete blocks in your construction project.

Applications of Our Concrete Blocks

• Load-Bearing Walls: Utilise our dense blocks for structural integrity in residential and commercial buildings.
• Partitions: Create internal divisions with our medium and aerated blocks, ensuring sound insulation and ease of installation.
• Foundations & Retaining Walls: Our solid, dense blocks provide the necessary strength for foundational work.
• Thermal & Acoustic Insulation: Aerated blocks offer superior insulation properties, enhancing energy efficiency.

Are Thermalite blocks strong?

Yes, Thermalite blocks are known for their strength and durability. Thermalite is a brand name for a type of lightweight aggregate block made from aerated concrete. These blocks are designed to have good load-bearing capacity while also providing excellent thermal insulation properties.

Thermalite blocks are lightweight, which makes them easier to handle and install compared to traditional dense concrete blocks. Despite their lightweight nature, Thermalite blocks are still structurally robust and can effectively support load-bearing walls in construction projects.

Additionally, Thermalite blocks offer excellent thermal insulation properties. The air pockets within the blocks help to reduce heat transfer, making them energy-efficient and suitable for applications where insulation is desired.

Overall, Thermalite blocks are considered to be strong and reliable, making them a popular choice in construction projects that require both strength and thermal insulation.

What is the strength of concrete?

The strength of concrete can vary depending on various factors such as the mix design, curing conditions, and the specific application. Concrete strength is typically measured in terms of compressive strength, which refers to the ability of concrete to withstand compressive forces.

The strength of concrete is often expressed in pounds per square inch (psi) or megapascals (MPa). The most common strength measurement for concrete is the 28-day compressive strength, which is the strength of concrete after 28 days of curing.

The strength of concrete can range widely, but typical values for common applications are as follows:

Low-strength concrete

Ranging from 1,500 to 3,000 psi (10 to 20 MPa). This is suitable for non-load-bearing applications such as sidewalks, patios, and residential driveways.

Medium-strength concrete

Ranging from 3,000 to 6,000 psi (20 to 40 MPa). This is commonly used for structural elements like beams, columns, and slabs in buildings and bridges.

High-strength concrete

Ranging from 6,000 to 12,000 psi (40 to 80 MPa) or even higher. This is used in specialised applications that require exceptional strength, such as high-rise buildings, heavy industrial structures, and infrastructure projects.

It's important to note that achieving the desired strength of concrete involves proper mix design, proportioning of ingredients, adequate curing, and quality control during the construction process. The strength of concrete can also be influenced by factors such as the type of cement used, the water-cement ratio, and the presence of additives or admixtures.

Why is concrete used?

Concrete is used extensively in various construction applications due to its numerous beneficial properties. Here are some reasons why concrete is commonly used:

Strength and Durability

Concrete is renowned for its strength and durability, making it suitable for structural applications. It can withstand heavy loads, resist compression, and has a long service life, especially when designed and constructed properly.

Versatility

Concrete is a versatile material that can be moulded into various shapes and sizes to meet specific design requirements. It can be used for walls, columns, slabs, beams, foundations, and more, allowing for flexible construction possibilities.

Fire Resistance

Concrete has excellent fire-resistant properties. It does not burn, and its slow heat transfer helps to contain fires and prevent their spread, making it a preferred material for fire-resistant structures.

Thermal Mass

Concrete has a high thermal mass, which means it can absorb and store heat. This property helps regulate temperature fluctuations, resulting in energy efficiency and improved indoor comfort in buildings.

Sound Insulation

Concrete has good sound insulation properties, which can reduce noise transmission between rooms or from outside sources. This makes it suitable for structures where acoustic control is important, such as residential buildings, offices, and theatres.

Weather Resistance

Concrete is resistant to weathering agents such as rain, wind, and sunlight. It can withstand harsh environmental conditions, including freeze-thaw cycles, without significant deterioration, making it ideal for outdoor applications.

Cost-Effectiveness

Concrete is often a cost-effective construction material, especially when considering its long-term durability and low maintenance requirements. It is readily available in most regions, which helps to control costs.

Sustainability

Concrete can be produced with recycled materials, such as fly ash and recycled aggregates, reducing the environmental impact. It also has a long life span, which reduces the need for frequent replacements.

These advantages make concrete a preferred choice for a wide range of construction projects, including residential buildings, commercial structures, bridges, dams, roads, and many more.

Why Choose Build4Less Concrete Blocks?

• Quality Assurance: All our blocks meet industry standards, ensuring reliability and performance.
• Versatility: Suitable for a wide range of applications, from foundations to partitions.
• Sustainability: Many of our blocks incorporate recycled materials, promoting eco-friendly construction.
• Competitive Pricing: We offer cost-effective solutions without compromising on quality.