Brick vs. Concrete Block: Cost, Strength, and Best Use

Brick and concrete block do different jobs well. Brick gives you a finished look and strong weather resistance. Concrete block goes up faster and handles structural work well. Compare cost, strength, insulation, and best-fit use before you buy.

The Fundamental Differences

Before comparing performance, let’s understand what we’re comparing:

What is Brick?

Traditional bricks are made from clay that’s molded and fired in a kiln at temperatures exceeding 2,000°F. This process creates a dense, durable unit with distinctive color and texture.

Standard Dimensions:

• Modular brick: 3-5/8” × 2-1/4” × 7-5/8”
• Standard brick: 3-5/8” × 2-1/4” × 8”
• Weight: 4-5 lbs each

What is Concrete Block?

Concrete blocks (CMU - Concrete Masonry Units) are made from Portland cement, aggregates, and water, then cured under pressure or steam. They come in various configurations—solid, hollow, and specialty shapes.

Standard Dimensions:

• Standard CMU: 8” × 8” × 16” (nominal)
• Actual: 7-5/8” × 7-5/8” × 15-5/8” (to account for mortar joints)
• Weight: 28-35 lbs each (hollow), 40-50 lbs (solid)

Strength Comparison

Compressive Strength

Concrete blocks generally offer superior compressive strength:

Material	Typical Compressive Strength
Standard Concrete Block	1,900-3,500 PSI
High-Strength CMU	4,500+ PSI
Standard Clay Brick	1,500-3,000 PSI
Engineering Brick	5,000-10,000 PSI

Key Insight: While concrete blocks have higher average compressive strength, engineering-grade bricks can exceed most CMU. The right choice depends on your specific structural requirements.

Flexural (Bending) Strength

Flexural (bending) performance depends on unit type, mortar, grout/reinforcement, and design. In many real-world applications, brick masonry performs well in bending and is commonly used for:

• Retaining walls subject to lateral pressure
• Facades exposed to wind loads
• Structures in earthquake-prone areas (when properly reinforced)

Load-Bearing Applications

For load-bearing walls:

• Foundations: Concrete block is standard (filled with rebar and grout)
• Above-grade walls: Both work well, but CMU is faster to install
• Retaining walls: Wall thickness and reinforcement should be engineered based on loads, soil, and local code

Cost Analysis: 2025 Pricing

Material costs tell only part of the story—labor often represents 50-70% of total masonry costs.

Material Costs

Material	Cost per Unit	Coverage	Cost per Sq Ft
Standard Clay Brick	$0.50-1.50	7 per sq ft (modular)	$3.50-10.50
Face Brick (premium)	$1.00-3.00	7 per sq ft	$7.00-21.00
Standard CMU (8×8×16)	$1.50-3.00	1.125 per sq ft	$1.70-3.40
Split-Face CMU	$2.50-5.00	1.125 per sq ft	$2.80-5.60

Labor Costs

This is where concrete block shines:

Task	Bricks per Hour	CMU per Hour
Experienced Mason	300-500	60-100
Average Coverage/Day	200-300 sq ft	100-150 sq ft (more sq ft per unit)

Why CMU is Faster:

• Fewer units to lay (1 CMU ≈ 8+ bricks in coverage)
• Larger mortar joints are more forgiving
• Lighter per square foot coverage

Total Installed Costs (2025)

Wall Type	Brick (per sq ft)	CMU (per sq ft)
Basic structural	$12-18	$8-14
Finished/decorative	$20-35	$12-22
Premium/custom	$35-60+	$20-35

Bottom Line: Concrete block often costs less to build with, but labor, finish, and local requirements can change the gap.

Thermal Performance

Insulation matters for energy efficiency and occupant comfort.

R-Value Comparison

Material	R-Value (per inch)	Typical Wall R-Value
Solid Clay Brick	0.2	R-0.8 (4” wall)
Hollow CMU	0.1-0.2	R-0.8-1.7 (8” wall)
Insulated CMU	1.0-2.5	R-8-20 (filled cores)
Brick Cavity Wall	N/A	R-3-5 (with air gap)

Advantages:

• Brick has a higher R-value per inch, making it slightly better for thin walls
• CMU with filled cores can achieve excellent insulation when filled with foam or vermiculite
• Both benefit from cavity wall construction with additional insulation

Thermal Mass

Both materials excel at thermal mass—storing and slowly releasing heat:

• Moderates indoor temperature swings
• Reduces heating/cooling loads
• Works best in climates with hot days and cool nights

Brick has a slight edge due to higher density, but the practical difference is minimal.

Durability and Lifespan

Longevity

Material	Expected Lifespan	Examples
Clay Brick	100-500+ years	Ancient Roman structures still standing
Concrete Block	75-100+ years	First CMU buildings (early 1900s) still in use

Key Factors Affecting Lifespan:

1. Freeze-thaw resistance: Both perform well when properly specified; brick may have slight edge
2. Chemical resistance: CMU better resists acids; brick better against alkalis
3. Salt damage: Brick more susceptible to efflorescence; CMU to sulfate attack
4. Maintenance: Brick requires less maintenance over time

Fire Resistance

Both materials are excellent fire barriers:

Assembly	Fire Rating
4” solid brick	1-2 hours
4” CMU (hollow)	1 hour
8” CMU (grouted)	4 hours
8” brick (solid)	4 hours

For fire-rated assemblies, concrete block is often preferred because grouted hollow cores can achieve high ratings economically.

Aesthetic Considerations

Brick Advantages

• Timeless appeal: Classic look that never goes out of style
• Color variety: Natural earth tones, or manufactured in virtually any color
• Texture options: Smooth, tumbled, wire-cut, sand-faced
• Pattern possibilities: Running bond, herringbone, basket weave, soldier course
• Premium perception: Higher perceived value in residential real estate

CMU Advantages

• Modern aesthetic: Clean lines suit contemporary architecture
• Consistent sizing: Easier to achieve precise dimensions
• Surface treatments: Split-face, ground-face, burnished, scored
• Versatility: Can be painted, stuccoed, or veneered
• Architectural blocks: Decorative units available for visual interest

Resale Value Impact\n\nBrick exteriors are often perceived as premium and can improve curb appeal. Any resale impact varies widely by region, comparable homes, and overall condition.\n\n## Best Applications for Each Material

When to Choose Brick

Application	Why Brick Works Best
Residential facades	Aesthetic appeal, perceived value
Historic restoration	Period authenticity
High-visibility commercial	Premium appearance
Thin veneer applications	Lighter weight options available
Curved walls	Easier to create smooth curves
Landscape features	Patios, walkways, garden walls

When to Choose Concrete Block

Application	Why CMU Works Best
Foundations	Higher compressive strength, moisture resistance
Load-bearing walls	Strength, speed, cost efficiency
Commercial/industrial	Fast installation, lower cost
Sound walls	Excellent acoustic properties
Fire-rated assemblies	Easy to achieve high ratings
Below-grade construction	Better moisture resistance

Hybrid Approach: Best of Both Worlds

Many successful projects combine both materials:

• CMU structural walls with brick veneer exterior
• Brick foundation to grade, CMU above with stucco
• CMU interior walls with brick accent features

This approach leverages the structural advantages of concrete block while maintaining the aesthetic appeal of brick where it matters most.

Installation Considerations

Skill Requirements

Task	Brick Difficulty	CMU Difficulty
Basic wall	Moderate	Easy-Moderate
Corners	Moderate	Easy
Openings	Difficult	Moderate
Patterns/bonds	Difficult	N/A (limited options)
Curved walls	Very Difficult	Difficult

Weather Sensitivity

Both materials have similar weather installation requirements:

• Temperature: Don’t lay below 40°F without protection
• Rain: Cover fresh mortar from direct rain
• Hot weather: Keep materials cool, mortar moist
• Wind: Protect fresh work from rapid drying

Mortar Requirements

Joint Type	Brick	CMU
Typical joint width	3/8”	3/8”
Mortar type	Type N or S	Type S or N
Mortar per 100 units	3-4 cu ft	4.5-5 cu ft

Environmental Impact

Sustainability is increasingly important in construction:

Carbon Footprint

Material	CO2 Emissions
Traditional Brick	26-27.3 kg CO2e/m²
Concrete Block	15-20 kg CO2e/m²

Note: Brick manufacturers have reduced emissions by approximately 8 kg CO2e/m² since 2015, and the gap is closing.

Sustainability Factors

Brick Advantages:

• Made from abundant natural clay
• No chemical additives required
• Recyclable and reusable
• Can last centuries (embodied carbon amortized over long life)

CMU Advantages:

• Can incorporate recycled aggregates (up to 50%)
• Lower manufacturing energy
• More efficient transportation (more coverage per truckload)
• Hollow cores reduce material use

Making Your Decision

Choose Brick If:

1. Aesthetic appeal is a top priority
2. You’re building residential or high-end commercial
3. Long-term value and durability matter most
4. Historic or traditional appearance is desired
5. Budget allows for higher initial investment

Choose Concrete Block If:

1. Cost efficiency is the primary concern
2. You’re building foundations or below-grade structures
3. Speed of construction is important
4. Fire ratings are a requirement
5. The structure will be clad or finished anyway

Choose Both If:

1. You want structural efficiency with aesthetic appeal
2. Budget allows for strategic brick placement
3. You’re building a hybrid commercial-residential project

Calculate Your Materials

Need exact masonry numbers? Use these calculators:

• Masonry Calculator: For brick walls, mortar, and accessories
• Concrete Block Calculator: For CMU walls and grout requirements

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Bottom Line: Neither material wins every job. Concrete block usually wins on speed and structure. Brick usually wins on finish and curb appeal.

References

• ASTM C62 (Building Brick): https://www.astm.org/c0062
• ASTM C90 (Loadbearing Concrete Masonry Units): https://www.astm.org/c0090
• ASHRAE Handbook—Fundamentals (thermal properties): https://www.ashrae.org/technical-resources/ashrae-handbook
• NCMA TEK resources (CMU design guidance): https://ncma.org/resource/tek/