S.L. Williamson

What S.L. Williamson does

S.L. Williamson Company, Inc. is a third-generation, family-owned asphalt paving and road construction company founded in 1949 and headquartered in Charlottesville, Virginia. The company produces plant mix asphalt (bituminous concrete) at three company-owned plants located in rock quarries in Central Virginia (Shadwell, Ruckersville, and Red Hill), with crushed aggregate comprising roughly 94-95% of mix weight and liquid asphalt binder the remaining 5-6%. It serves the Virginia Department of Transportation, the City of Charlottesville, the University of Virginia, municipalities, commercial developers, country clubs, airports, residential customers, and historic sites, executing highway resurfacing, municipal road construction, commercial subdivision paving, farm and estate driveways, and specialty historic restoration projects including work with Addaset and Addastone resin-bound surfacing systems.

The company's product portfolio centers on plant mix asphalt, complemented by Aquaphalt, a proprietary water-activated permanent cold patch repair material launched in 2008 and ranked #1 by Consumer Reports in 2015 for pothole repairs, plus warm-mix asphalt, porous asphalt for stormwater management, and reclaimed asphalt pavement (RAP) recycling under its Green Initiatives. Revenue is generated through project-based paving contracts (one-time contracts ranging from pothole patching to heavy highway work) and per-ton plant mix material sales under FOB purchase orders with NET 30 terms, with the Aquaphalt brand also distributed nationally through a dealer network managed by a dedicated National Sales Director. The business is entirely B2B and B2G, with no consumer e-commerce channel, and its go-to-market relies on estimators providing free on-site quotes followed by competitive public bids for government work and negotiated commercial contracts.

Name

S.L. Williamson

Legal name

S.L. Williamson Company, Inc.

Website

https://slwilliamson.com

Company type

Private

Founded year

1949

Operating status

Operating

Headcount range

101–250 employees

Short description

S.L. Williamson is a third-generation, family-owned asphalt paving and road construction company founded in 1949 in Charlottesville, Virginia, operating three Central Virginia production plants and serving government, commercial, institutional, and residential customers with plant mix asphalt and proprietary specialty surfacing products including Aquaphalt.

Ownership category

akta.pro rank

Product category

Asphalt Paving and Road Construction Services

NAICS

Asphalt Paving Mixture and Block Manufacturing (324121), Asphalt Paving, Roofing, and Saturated Materials Manufacturing (32412)

SIC

Asphalt Paving & Roofing Materials (2950)

akta.pro primary industry

Asphalt Mixing & Paving Materials (Hot/Warm/Cold Mix, RAP/RAS Blends) (EUALAKAG)

akta.pro secondary industry

Asphalt Additives & Performance Enhancers (Anti-strip, Warm-mix, Fibers, Rejuvenators) (EUALAKAH)

Keywords

• Asphalt paving services
• Road construction
• Plant mix asphalt
• Cold patch repair
• Highway construction

Headquarters

HQ city

Charlottesville

HQ country

United States

HQ region

North America

Offices5 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. Asphalt Paving Services: Contract-based road construction and paving services for public highways, municipal projects, commercial sites, and residential properties. Revenue generated through project contracts with VDOT, municipalities, commercial entities, contractors, and individuals. Work scope ranges from pothole patching to heavy highway construction.
2. Plant Mix Asphalt Material Sales: Production and sale of plant mix asphalt (also called 'Blacktop' or 'Bituminous Concrete') from three company-owned asphalt plants in Central Virginia. Materials sold to VDOT, municipalities, other contractors, and individuals. Approximately 94-95% crushed aggregate by weight with liquid asphalt binder.
3. FOB Purchase Orders: Free on Board material orders where customers pick up asphalt materials from company plants. Customer places order specifying plant choice, material type, and quantity in tons. Orders required by 4:00 PM day prior for fulfillment.
4. Aquaphalt Distribution: Distribution of proprietary Aquaphalt cold patch product. Aquaphalt hit marketplace in 2008 and is the company's branded solution for permanent asphalt and concrete repairs. Sold through dealers and direct contact with National Sales Director.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels5 records

Core offering

S.L. Williamson Company produces plant mix asphalt (bituminous concrete) at three company-owned plants in Central Virginia and installs it on highway, municipal, commercial, residential, and special restoration paving projects. The company also distributes its proprietary Aquaphalt water-activated cold patch repair material and offers specialty resin-bound and resin-bonded surfacing systems (Addaset and Addastone), surface treatments (tar and chip), porous asphalt, and warm-mix asphalt solutions.

Product overview

S.L. Williamson Co. is a third-generation asphalt paving and road construction company operating three asphalt plants in Central Virginia. The company's core product portfolio centers on Plant Mix Asphalt production and installation, supplemented by proprietary and specialty offerings. Their flagship proprietary product is Aquaphalt, a water-activated permanent repair material launched in 2008. They also offer Addaset and Addastone resin-bound/bonded surfacing systems for special projects, Surface Treatment (tar and chip) for rural applications, Porous Asphalt for stormwater management, and Warm-Mix Asphalt for sustainable reduced-temperature paving. Services span highway/municipal, commercial, residential/farm/estate, and special/historical restoration projects.

Differentiator

Problem solved

Functional benefit

Brands

• Aquaphalt: First pre-mixed, permanent asphalt and concrete repair material that is water-activated, 100% environmentally friendly, and ranked #1 by Consumer Reports in 2015 for pothole repairs. Sold nationally through dealers.

Products and services

• Highway and Municipal Paving Services Large-scale asphalt paving, resurfacing, and reconstruction services for state highway and municipal road projects. Delivered through direct contract with VDOT, the City of Charlottesville, and other municipalities. Emphasizes sustainability through warm-mix technology and recycled asphalt.
• Commercial Paving Services Asphalt paving services for commercial developments, country clubs, airports, schools, and corporate sites, including street excavation, grading, stone base work, and placement of base and surface mix asphalt.
• Residential, Farm and Estate Paving Paving services for residential driveways, farm roadways, estate entrances, barn parking, and pickleball courts. Includes base preparation, drainage design, shoulders, and surface options such as plant mix or surface treatment (tar and chip).
• Special Projects Paving and Restoration Specialty paving and restoration services for historic and cultural sites, including the Addaset Resin Bound and Addastone Resin Bonded Surfacing Systems. Examples include Georgetown Waterfront Park, UVA Historic Key Alley, and Monticello/Montpelier restorations.
• Plant Mix Asphalt (FOB Material Sales) Production and sale of hot-mix plant mix asphalt (BM-25.0 base mix, IM-19.0A/D intermediate mix, SM-12.5A/D surface mix, SM-9.5A/D surface mix) from three company-owned plants. Available FOB to VDOT, municipalities, contractors, and individuals. Approximately 94-95% crushed aggregate and 5-6% liquid asphalt binder by weight.
• Aquaphalt Proprietary pre-mixed, permanent asphalt and concrete repair material activated with water alone (no petroleum-based solvents or VOCs). Designed for fast, permanent pothole and pavement repairs without heavy equipment. Ranked #1 by Consumer Reports in 2015; backed by 3-year warranty and 12-month shelf life. Distributed nationally through dealers.
• Surface Treatment (Tar and Chip / Chipseal) Road surface application involving spraying liquid asphalt on a prepared stone base, covering with crushed aggregate, and compacting. Applied in 2-3 layers for a rural aesthetic with a 'float' of loose gravel.
• Porous Asphalt Pavement Permeable pavement solution enabling stormwater storage and infiltration for parking lots and city streets. Provides runoff control, aquifer recharge, and reduces drainage structure requirements; proven in freeze-thaw climates.
• Warm-Mix Asphalt

Quantifiable outcome

• 100% recyclable and reusable asphalt pavement
• +6 more outcomes

Named customers15 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• Virginia Asphalt AssociationcoreStrategic or Co-development PartnerIndustry association membership and leadership. Company President Blair K. Williamson serves as Board member and President of the Virginia Asphalt Association. Represents the asphalt paving industry in Virginia for advocacy, standards, and professional development.
• National Asphalt Pavement AssociationcoreStrategic or Co-development PartnerNational industry association membership representing asphalt pavement producers and contractors. Provides access to industry best practices, research, and standards development.
• Associated General Contractors of VirginiacoreStrategic or Co-development PartnerState chapter of the construction industry association. Past Board Member involvement from President Blair K. Williamson. Represents construction contractors for advocacy and professional development.
• Old Dominion Highway Contractors AssociationcoreStrategic or Co-development PartnerState industry association for highway contractors. President Blair K. Williamson serves as Board Member and Past President. Represents highway construction industry interests in Virginia.
• Virginia Road & Transportation Builders AssociationminorStrategic or Co-development PartnerIndustry association for transportation builders. Past Board Member involvement. Represents road and transportation construction industry in Virginia.
• Verified Vendor Seal 2022minorOthersVerified vendor certification obtained in 2022, displayed on company website About page, indicating business verification status.
• Virginia Department of Transportation (VDOT)coreStrategic or Co-development PartnerPrimary public sector client. Produces and installs plant mix asphalt under contract with VDOT for public projects. Uses VDOT specifications for mix types (BM-25.0, IM-19.0A/D, SM-12.5A/D, SM-9.5A/D). Work includes highways, streets, and roads with heavy commercial traffic.

Scale indicators8 records

Recent moves6 records

Expansion highlights2 records

Direct peers

• Branscome Companies: Willamsburg, Virginia-based heavy civil contractor with aggregate, asphalt, and paving operations serving VDOT and public-sector clients across Virginia; comparable in regional scale, plant ownership, and government contract focus.
• B.P. Short & Son Paving: Regional Virginia asphalt paving and excavation contractor serving commercial, residential, and government customers; comparable in service mix and territory, though smaller than S.L. Williamson in scale and plant ownership.
• Boxley Materials: Virginia aggregates and asphalt producer with multiple asphalt plants; comparable vertically integrated quarry-to-paving model and Virginia-based service territory to S.L. Williamson.
• Virginia Paving Company: Virginia-based asphalt paving and materials supplier operating similarly sized regional asphalt plants and serving VDOT, municipal, commercial, and residential customers across Virginia; directly comparable in service mix, customer profile, and mid-Atlantic geography.
• All States Materials Group: Multi-state asphalt paving and aggregate producer operating company-owned asphalt plants across the Northeast and Mid-Atlantic; comparable vertically integrated plant-to-paving model and similar government/contractor customer base.
• Unique Paving Materials (UPM): Manufacturer of branded cold-patch asphalt and concrete repair products distributed nationally through dealers; the most direct competitive comparable to S.L. Williamson's Aquaphalt product line in cold-patch repair chemistry and distribution model.

Broad incumbents

• Lane Construction Corporation: National heavy civil and asphalt paving contractor with extensive highway and airport paving experience; broader national reach but overlapping core service of hot-mix asphalt production and highway paving for DOT clients.
• APAC-Atlantic (CRH): Mid-Atlantic asphalt paving and materials operations within CRH's Americas Materials division; broader geographic footprint and corporate scale, but offering the same plant-mix and paving service model.
• Martin Marietta Materials: Major U.S. aggregates producer with asphalt mix operations as part of its Heavy Side Materials platform; comparable aggregate-anchored asphalt business model but operates across multiple states at much larger scale.
• Vulcan Materials Company: Largest U.S. producer of construction aggregates with significant asphalt-mix production as a downstream extension of its quarries; vertically integrated model mirrors S.L. Williamson's aggregate-anchored plant strategy but at massive national scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/s.-l.-williamson-co.-inc.

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

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 S.L. Williamson