Interslab

What Interslab does

Interslab (legal name: International Slab Sales (Pty) Ltd.) is a South African-owned wholesale distributor of engineered quartz, porcelain, granite, marble, and natural stone slabs, founded in 2000 by Rudi Eggers, Bridgitte van der Merwe, and the late Dr H. Eggers and headquartered in Johannesburg. The company operates a multi-brand portfolio consisting of three proprietary sub-brands (Rudi's Choice for hand-selected natural stone, Eezi Quartz for affordable engineered quartz, and LUTUM for large-format porcelain) plus exclusive distribution rights for Caesarstone in South Africa and Infinity Surfaces across Southern Africa. Interslab runs a wholesale supply business built around 9 physical slab-yard branches across South Africa (Johannesburg x2, Cape Town, Durban, Pretoria, Gqeberha, Mbombela, George), a direct branch in Matola, Mozambique, and a distributor (Slab Sales Africa) in Harare, Zimbabwe.

Revenue is generated primarily through wholesale slab distribution to contractors, renovators, fabricators, and consumers via direct branch sales, complemented by the Interslab Projects division for large-scale commercial construction supply, Interslab Shipping for customs clearing and air/ocean freight, and a small retail line of branded cleaning products (Eezi Quartz Cream Cleanser at R46.00 and Caesarstone Spray Cleanser at R57.50). Go-to-market combines enterprise field sales through the Projects division, sales-led direct wholesale via branch sales consultants offering slab-yard tours and fabricator referrals, and a channel-partner installer network ("Find an Installer"). A company-owned truck fleet supports a 24-hour ordering-to-delivery turnaround, and an in-house EDI-integrated customs capability lowers landed cost on imported slabs.

The business is privately held with no external PE/VC investment, approximately 130+ employees, and founder-led management. Customers are diversified across enterprise construction projects, mid-market renovation professionals, homeowner/SMB end customers, and independent fabricators, with no public revenue disclosure.

Name

Interslab

Legal name

International Slab Sales (Pty) Ltd.

Website

https://interslab.co.za

Company type

Private

Founded year

2000

Operating status

Operating

Headcount range

101–250 employees

Short description

Interslab is a South African wholesale distributor of engineered quartz, porcelain, granite, and marble slabs, operating 9 branches plus Mozambique and Zimbabwe under proprietary brands (Rudi's Choice, Eezi Quartz, LUTUM) and exclusive rights to Caesarstone and Infinity Surfaces. It serves contractors, renovators, architects, and fabricators across Southern Africa.

Ownership category

akta.pro rank

Headquarters

HQ city

Johannesburg

HQ country

South Africa

HQ region

Africa

Offices10 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Infrastructure, Marketing or Sales

Revenue model

1. Wholesale Slab Distribution: Wholesale distribution of engineered quartz, exotic granite, marble, and porcelain slabs through multiple brands to contractors, renovators, and consumers. Revenue generated from bulk material sales across multiple South African branches and regional markets.
2. Large-Scale Projects: Interslab Projects division manages supply chain from specification to completion for large-scale construction projects. Bulk buying enables reduced unit prices on all brands under the Interslab umbrella.
3. Cleaning Products: Sale of proprietary cleaning products including Eezi Quartz Cream Cleanser and Caesarstone Spray/Cream Cleansers at retail price points (R46-R57.50). Products available for purchase at branches.
4. Customs Clearing Services: Accredited and licensed customs clearing agent providing electronic clearance at major South African ports and airports. Also offers freight auditing services.
5. Air and Ocean Freight Solutions: Freight solutions through partnerships with airlines and ocean carriers, offering FCL/LCL, bulk/breakbulk shipping. Long-term agreements with carriers ensure competitive rates and schedule flexibility.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels4 records

Core offering

Interslab is a South African wholesale distributor of engineered quartz, porcelain, granite, and marble slabs, supplying building, kitchen, and bathroom renovation materials through a multi-brand portfolio of three proprietary brands (Rudi's Choice, Eezi Quartz, LUTUM) and two exclusive distribution brands (Caesarstone, Infinity Surfaces). The company operates 9 branches across South Africa plus Mozambique and Zimbabwe, and offers complementary services including Interslab Projects for large-scale construction supply chain management and Interslab Shipping for customs clearing and freight logistics.

Product overview

Interslab is a South African wholesale supplier of engineered quartz, porcelain, and natural stone slabs operating a multi-brand portfolio consisting of three proprietary sub-brands (Rudi's Choice, Eezi Quartz, and LUTUM) and two exclusive distribution brands (Caesarstone and Infinity Surfaces). The portfolio serves building, kitchen, and bathroom renovation needs through a network of branches across Southern Africa. Supporting services include Interslab Projects for large-scale construction project management and Interslab Shipping for customs clearing and freight logistics. The company also offers complementary cleaning products (Eezi Quartz and Caesarstone branded cleansers) for surface maintenance.

Differentiator

Problem solved

Functional benefit

Brands

• Rudi's Choice: Original brand offering natural stone slabs including granite, marble, onyx, and quartzite collections, hand-selected by founder Rudi Eggers.
• Eezi Quartz
• LUTUM
• Caesarstone
• Infinity Surfaces

Products and services

• Rudi's Choice

Quantifiable outcome

• 24-hour turn-around time between ordering and delivery of slabs

Named customers3 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Four partnerships are on record, tiered core and supporting.

• Slab Sales AfricacoreChannel Partner/ Reseller/ DistributorOfficial distributor in Harare, Zimbabwe representing Interslab products. Contact: [email protected], Tel: +263 775 137 942. Located at Cnr. Loreley Close and Loreley Crescent, Msasa, Harare.
• Airline PartnerssupportingStrategic or Co-development PartnerLocal and international airline partnerships for cost-effective and efficient airfreight services to airfreight importers and exporters.
• Ocean CarrierssupportingStrategic or Co-development PartnerLong-term agreements with established ocean carriers providing competitive rates and schedule flexibility for door-to-door ocean delivery to all major points globally. Services include FCL/LCL, bulk/breakbulk, reefers, flat racks, open top, and high cube containers.
• SARS (South African Revenue Service)supportingTechnology or IntegrationEDI (Electronic Data Interchange) system integration for electronic customs clearance at all major South African ports and airports, providing time-saving benefits, greater data accuracy, and improved security.

Scale indicators7 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Cosentino: Cosentino is the Spanish global manufacturer and distributor of Silestone quartz and Dekton ultra-compact surfaces. It is comparable to Interslab's premium engineered-stone and porcelain portfolio and competes across the same kitchen/bathroom/interior surfacing category worldwide.
• Cambria: Cambria is a US-based quartz surface manufacturer that sells through an exclusive showroom/distributor network. Comparable to Interslab's positioning as a premium branded quartz provider (Caesarstone equivalent in the US), though at manufacturing and domestic US-distribution scale.
• Caesarstone: Caesarstone is the global quartz-surface manufacturer whose products Interslab exclusively distributes across South Africa. As a manufacturer-distributor it is a broad incumbent in the same product category but differs from Interslab in that it owns production rather than acting as a regional wholesale intermediary.
• Dal-Tile: Dal-Tile is one of the largest North American manufacturers and distributors of tile, natural stone, and quartz/porcelain countertops with an extensive showroom distributor network. Overlaps with Interslab in slab surfacing wholesale distribution, but operates at far greater scale and across more product categories.
• Wilsonart: Wilsonart is a large US-based engineered surfaces manufacturer (quartz, solid surface, laminates) with global distribution. Comparable in product category breadth to Interslab's multi-brand engineered-quartz/porcelain offering, though vertically integrated into manufacturing.

Direct peers

• Arizona Tile: Arizona Tile is a US-based wholesale distributor of natural stone, quartz, tile, and slab surfacing products through company-owned showrooms. Its branch-and-showroom wholesale distribution model closely mirrors Interslab's 9-branch slab-yard go-to-market.
• M S International (MSI): MSI is the largest North American wholesale distributor of natural stone, quartz, tile, and countertops, operating dozens of showroom distribution centers. It is the closest analog to Interslab in core business model (multi-brand slab/tile distribution to fabricators, contractors, and consumers) though at significantly larger scale and in a different geography.

Emerging players

• Hanwha Surfaces (Viatera): Hanwha Surfaces produces Viatera quartz surfaces and competes in the same engineered-stone category as Caesarstone, Eezi Quartz and Cosentino. Comparable as an emerging-to-global branded manufacturer-distributor of quartz surfaces that may eventually seek exclusive regional distribution partners across Africa.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/international-slab-sales
• Xx.com/InterslabZA
• Facebookfacebook.com/InterslabZambia

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 Interslab