What Clarkes Block does

Clarkes Block Co is a family-owned and operated concrete block manufacturer and masonry materials supplier headquartered in Savannah, Georgia, in continuous operation since 1939. The company produces a full line of concrete masonry units, including UL-rated Fire Block, certified Dry Block, Whitaker Lab-validated Lightweight Block, and a catalog of standard 8-inch stretcher, corner, square end, and steel sash block variants in multiple sizes. It also stocks complementary construction materials such as mortar, rebar, rod chairs, and foundation supplies, and operates a wholly-owned subsidiary, CB Sand Co., which runs two sand production plants in Guyton, Georgia producing DOT-certified masonry sand, concrete sand, fill sand, and fill dirt.

The business serves both commercial (builders and architects) and residential (homeowners and residential contractors) customers in the Savannah region, distributing products through a walk-in physical storefront at its Tremont Road headquarters, phone-based direct sales, and bulk delivery from both the main plant and the Guyton sand operation. Third-party credentials — UL listing, Dry Block system certification from Grace Construction Products, NCMA membership, DOT sand certification, and Whitaker Laboratory testing — anchor the value proposition around quality assurance and regulatory compliance rather than technology differentiation.

Revenue mechanics are straightforward transactional sales with quote-based pricing and no published rates. The company has 1-10 employees, no external funding, no parent company, and no disclosed institutional ownership; it operates exclusively within Georgia with no stated geographic expansion, no digital commerce platform beyond a static informational website, and no third-party logistics partners. The operating model is best characterized as a stable, multi-generational local industrial supplier prioritizing reliability and certification depth over scale or technology investment.

Name

Clarkes Block

Legal name

Clarkes Block Co

Website

https://clarkesblock.com

Company type

Private

Founded year

1939

Operating status

Operating

Headcount range

1–10 employees

Short description

Clarkes Block Co is a family-owned Savannah, Georgia manufacturer founded in 1939 that produces concrete blocks (Fire, Dry, Lightweight), masonry materials, and DOT-certified sand via its CB Sand subsidiary, serving local residential and commercial builders through direct sales and bulk delivery.

Ownership category

akta.pro rank

Product category

Construction Materials Manufacturing

NAICS

Concrete Block and Brick Manufacturing (327331), Concrete Pipe, Brick, and Block Manufacturing (32733)

SIC

Concrete, Gypsum & Plaster Products (3270)

akta.pro primary industry

Lightweight Aggregate Blocks (e.g., Pumice, Cinder) (IMADABAE)

Keywords

• Concrete block manufacturing
• Masonry materials supply
• Sand production
• Construction materials supply
• Foundation materials

Headquarters

HQ city

Savannah

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Infrastructure

Revenue model

1. Concrete Block Sales: Manufacturing and selling various types of concrete blocks including stretcher blocks, corner blocks, square end blocks, and steel sash blocks in various sizes (8", 10", 12", 4", 6").
2. Masonry Materials Sales: Stocking and supplying masonry materials including mortar, sand, rebar, rod chairs, and foundation materials. Products include fill dirt, fill sand, masonry sand, and concrete sand.
3. Sand and Fill Materials: Operating sand mine and plant producing masonry sand, concrete sand, fill sand, and fill dirt. Two separate plants manufacture these materials, with delivery and pickup options available.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels1 record

Core offering

Clarkes Block Co manufactures and supplies concrete masonry blocks (Fire Block, Dry Block, Lightweight Block, and standard 8x8x16 configurations) along with related masonry materials including mortar, sand, rebar, rod chairs, and foundation materials. The company operates two sand production plants producing masonry sand, DOT-certified concrete sand, fill sand, and fill dirt, serving residential and commercial customers in the Savannah, Georgia region.

Product overview

Clarkes Block is a family-owned concrete block manufacturer and masonry materials supplier serving the Savannah, Georgia area since 1939. The company operates as a single unified product business offering concrete blocks (Fire Block, Dry Block, Lightweight Block, and various 8-inch block configurations including Stretcher, Corner, Square End, and Steel Sash variants) alongside complementary construction materials including Mortar, CB Sand (masonry sand, concrete sand, fill sand), Fill Dirt, Rebar, Rod Chairs, and other foundation materials. Products are supplied to both residential and commercial consumers, with delivery available.

Differentiator

Problem solved

Functional benefit

Brands

• CB Sand: Sand mine and plant operation manufacturing masonry sand, concrete sand, fill sand, and fill dirt. Concrete sand is DOT certified.

Products and services

• Fire Block

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Three partnerships are on record, tiered core.

• Dry Block (Grace Construction Products)coreTechnology or IntegrationClarkes Block is a certified Dry Block producer, using the Dry Block mortar admixture system from Grace Construction Products. The Dry Block system provides enhanced water resistance and durability for concrete masonry construction.
• Underwriters Laboratory (UL)coreTechnology or IntegrationClarkes Block is certified by Underwriters Laboratory and their Fire Block products are UL-rated, meeting established safety standards for fire-resistant construction materials.
• National Concrete Masonry AssociationcoreOthersClarkes Block is a member of the National Concrete Masonry Association, an industry trade organization representing concrete masonry manufacturers and promoting the industry.

Scale indicators1 record

Recent moves1 record

Broad incumbents

• Vulcan Materials Company: Vulcan Materials is the largest U.S. producer of construction aggregates, including sand and gravel used in concrete production. Through its CalMat and subsidiary operations, Vulcan also produces concrete masonry, directly comparable to Clarkes Block's block and CB Sand sand production business.
• Oldcastle APG (CRH plc): Oldcastle APG, the architectural products division of CRH, is a leading North American manufacturer of concrete masonry, hardscape, and packaged concrete products. Oldcastle's regional block plants compete head-to-head with Clarkes Block in the residential and commercial masonry supply market.
• Summit Materials: Summit Materials is a vertically integrated construction materials company producing cement, aggregates, ready-mix concrete, and concrete masonry products in U.S. markets, including the Southeast. Both companies produce concrete block and aggregates/sand, serving overlapping residential and commercial end-markets.
• CEMEX USA: CEMEX USA is a major cement, ready-mix concrete, and aggregates producer with concrete masonry operations. Clarkes Block competes for the same commercial and residential concrete block demand with a much smaller, regional manufacturing footprint.
• Holcim US (LafargeHolcim): Holcim US is a large cement, aggregate, and concrete products manufacturer supplying concrete masonry units nationwide. Clarkes Block and Holcim US both produce concrete block products serving commercial/residential builders in overlapping Southeastern U.S. markets.
• Quikrete Companies: Quikrete is the largest North American manufacturer of packaged concrete and masonry products, including concrete block, mortar, and concrete mixes. While Clarkes Block operates as a regional block manufacturer with sand production, both serve overlapping commercial and residential masonry end-markets with concrete masonry units.

Others

• National Concrete Masonry Association (NCMA) member producers: The National Concrete Masonry Association is the industry trade association to which Clarkes Block belongs. Other NCMA member producers (e.g., regional CMU manufacturers across the Southeast) compete for the same specification-driven commercial and residential masonry demand as Clarkes Block.

Direct peers

• Block USA (now part of Gulf Coast Stone Supply): Block USA was a Southeastern U.S. concrete masonry manufacturer operating multiple production facilities across Alabama, Georgia, and Mississippi. As a Georgia-based regional block manufacturer, Clarkes Block competes directly for similar commercial builders, architects, and residential contractors in the same Sun Belt trade areas.
• Concrete Block & Supply Co. (CBS): Concrete Block & Supply is a Southeastern U.S. concrete block manufacturer and masonry supplier serving builders, contractors, and homeowners. The product lines, customer base, and regional-manufacturer model are closely aligned with Clarkes Block's operations.

Regional players

• Yankee Stadium Concrete Block / A-1 Block (Florida concrete block producers): A-1 Block is a Florida-based concrete block manufacturer producing conventional and specialty CMU products for commercial and residential construction. While serving a different state, A-1 Block operates with the same single-state regional model, similar product breadth, and analogous builder/architect customer base as Clarkes Block.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/clarkes-block-co

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Clarkes Block