Tammerbitumi Oy
Tammerbitumi Oy is a Finnish bitumen roofing specialist installing and renovating flat and low-slope roofs for industrial, commercial, and residential customers across Finland, operating since 1991 as part of the TEQT Group Finland platform.
- Company typePrivate
- Founded1991
- HeadquartersTampere, Finland
- Headcount11–50
- GTM typeB2B
- OfferingServices
What Tammerbitumi Oy does
Tammerbitumi Oy is a Finnish bitumen roofing contractor specializing in the installation and renovation of flat and low-slope roofs for industrial, commercial, and residential buildings across Finland. Founded in 1991 in Pirkkala (Tampere region), the company has installed more than three million square meters of bitumen roofing over its 30+ year history and reports revenue of approximately €10 million for FY2025. Tammerbitumi serves industrial property owners, housing cooperatives (taloyhtiöt), construction companies, municipalities, and individual property owners through three office locations in Pirkkala, Espoo, and Oulu (the latter via its wholly-owned subsidiary Suomen Huopakatto Oy).
The company's core offering centers on bitumen waterproofing using torch-welded and adhesive membrane installation techniques. Its primary materials partner is Kerabit, whose bitumen membranes are manufactured in Lohja, Finland, and carry ISO 9001 and ISO 14001 certifications, the Finnish Avainlippu (Key Flag) designation, and a 15-year product warranty. Tammerbitumi also delivers differentiated sub-products including Kerabit Nature (approximately 59% lower carbon footprint than conventional bitumen) and Kerabit LESSNOX (an air-purifying membrane that neutralizes nitrogen oxides), alongside green roof systems and integrated solar panel installation services. Insulation is sourced through a partnership with ROCKWOOL Finland for fire-rated stone wool products.
Tammerbitumi runs a project-based business model, generating revenue through turnkey (avaimet käteen) roofing installations and an ongoing maintenance and quick-repair service for existing clients. Pricing is set per square meter based on project specifications, materials selected, and site complexity. Distribution is via a regional direct-sales model with area directors and area managers covering Pirkanmaa, the Helsinki metro area, Varsinais-Suomi, Satakunta, and Northern Finland. Following the 2024 acquisition by Sweden's TEQT Group AB, Tammerbitumi operates within the TEQT Group Finland platform alongside sister brands Solvikin Kattohuolto Oy and Peltisepänliike Kaasalainen Oy, gaining group-level resources, financial backing, and structured cross-referral opportunities.
Tammerbitumi Oy firmographics
Firmographics- Name
- Tammerbitumi Oy
- Legal name
- Tammerbitumi Oy
- Website
- https://tammerbitumi.fi
- Company type
- Private
- Founded year
- 1991
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Tammerbitumi Oy is a Finnish bitumen roofing specialist installing and renovating flat and low-slope roofs for industrial, commercial, and residential customers across Finland, operating since 1991 as part of the TEQT Group Finland platform.
- Ownership category
- akta.pro rank
Tammerbitumi Oy industry classification
Industry- Product category
- Commercial Roofing Services
- NAICS
- Roofing Contractors (238160)
- SIC
- Asphalt Paving & Roofing Materials (2950)
- akta.pro primary industry
- Roofing Systems & Waterproofing (Membranes, Shingles, TPO/EPDM, Liquid-Applied) (IMAFAMAA)
- akta.pro secondary industries
- Flat Roof Repair & Membrane Restoration (TPO/EPDM/PVC/Built-Up) (HSAGAKAE), Flashing, Edge Metal & Roof Accessories (IMADAFAJ)
Keywords
Where Tammerbitumi Oy is headquartered
LocationHeadquarters
- HQ city
- Tampere
- HQ country
- Finland
- HQ region
- Europe
Offices3 records
Markets served
Tammerbitumi Oy business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Supply Chain, Operations, Marketing or Sales, Infrastructure
Revenue model
- Bitumen Roofing Installation Services: One-time project-based revenue from installing and renovating bitumen roofs for industrial, commercial, and residential properties. Projects are delivered on a turnkey (avaimet käteen) basis, covering full installation including old roof removal, substrate preparation, and new membrane installation. Pricing is per square meter based on project specifications.
- Roof Maintenance and Repair Services: Ongoing revenue from roof maintenance and quick repair services for existing customers. Includes inspections, cleaning, moss removal, seam repairs, and emergency leak repairs. The company's dedicated maintenance unit serves existing client relationships.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Multi-year contract | Project-based pricing varies by scope |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels6 records
Tammerbitumi Oy product offering
Product offeringCore offering
Tammerbitumi Oy is a Finnish bitumen roofing specialist that installs, renovates, and maintains bitumen (huopakatto) roofs for industrial, commercial, and residential buildings on a turnkey (avaimet käteen) basis. The company exclusively uses Kerabit-brand bitumen membranes manufactured in Lohja, Finland, offering standard, low-carbon (Nature), and air-purifying (LESSNOX) product variants, along with green roof systems and solar panel integration as add-on services.
Product overview
Tammerbitumi Oy operates as a bitumen (huopakatto/bitumikatto) roofing specialist offering comprehensive services including installation, renovation, and maintenance. The core offering centers on Kerabit-brand bitumen membrane products manufactured in Lohja, Finland, with ISO 9001 and ISO 14001 certifications. Product portfolio includes standard Kerabit membranes, the low-carbon Kerabit Nature® sub-brand, and the air-purifying Kerabit LESSNOX® variant. The company provides green roof solutions and solar panel installation as add-on services. Suomen Huopakatto Oy (acquired 2023) serves as a subsidiary for Northern Finland operations. All roofing projects are delivered on a turnkey (avaimet käteen) basis.
Differentiator
Problem solved
Functional benefit
Products and services
- Bitumen Roofing Installation and Renovation (Bitumikattojen asennus ja saneeraus) Professional turnkey (avaimet käteen) bitumen roofing installation and renovation services for industrial, commercial, and residential buildings across Finland. Includes complete project delivery from old roof removal and substrate preparation to new membrane installation, with a 10-year material and waterproofing warranty.
- Kerabit Bitumen Membranes (Kerabit-bitumikermit) High-quality Finnish-manufactured bitumen membrane products for roofing applications, featuring ISO 9001 and ISO 14001 certification, Avainlippu (Key Flag) designation, and a 15-year product warranty. Applied using torch-welded and adhesive methods for waterproof membrane installation.
- Kerabit Nature Low-Carbon Bitumen Membrane (Kerabit Nature®) Low-carbon bitumen roofing membrane with approximately 59% lower carbon emissions (GWPtotal) compared to conventional bitumen roofing, achieved by using renewable and recycled raw materials. Suitable for environmentally-conscious commercial and residential projects.
- Kerabit LESSNOX Air-Purifying Bitumen Membrane (Kerabit LESSNOX®) Air-purifying bitumen membrane with light-colored LESSNOX granule coating that breaks down nitrogen oxides (NOx) harmful to the environment, providing an air-quality-improving roofing solution for industrial and commercial buildings.
- Green Roof Solutions (Viherkatto-ratkaisut) Vegetated roof systems integrated with bitumen waterproofing using Kerabit products with root protection layers, drainage, and waterproofing solutions designed for Finnish climate conditions. Provides stormwater management, thermal regulation, and biodiversity benefits.
- Roof Maintenance and Repair Services Ongoing roof maintenance and quick repair services for existing customers, including inspections, cleaning, moss removal, seam repairs, and emergency leak repairs. Operated as a dedicated maintenance unit serving existing client relationships.
- Solar Panel Installation with Roof Renovation (Aurinkopaneelien asennus kattoremontin yhteydessä) Solar panel installation service integrated with bitumen roof renovation projects, providing a single-contractor solution for property owners seeking combined energy and roofing upgrades.
Quantifiable outcome
- Over 3 million square meters of bitumen roofing installed since 1991
- +1 more outcomes
Companies that use Tammerbitumi Oy
Customer profileNamed customers10 records
Segments4 records
Ideal customer profiles3 records
Tammerbitumi Oy technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
Tammerbitumi Oy partnerships and signals
Strategic signalPartnerships
Three partnerships are on record, tiered core and major.
- Suomen Huopakatto OycoreTammerbitumi acquired 100% of Suomen Huopakatto Oy shares in late 2023. The company operates from Oulu and specializes in bitumen roofing in the Oulu region and all of Northern Finland (including Lapland). Founded by Janne Honkonen in 2014.
- ROCKWOOL FinlandmajorInsulation supplier partnership for roof projects. ROCKWOOL provides non-combustible stone wool insulation that withstands temperatures over 1000°C, contributing to fire safety. Products are 100% recyclable through the Rockcycle recycling system with 70% reduced carbon footprint.
- Kerabit (Lohja)corePrimary materials supplier providing Finnish-made bitumen roofing products. Kerabit products are manufactured in Lohja since 1955, with ISO 9001 and ISO 14001 certification. Products include standard, Nature (low-carbon), and LESSNOX (air-purifying) variants. All products carry Avainlippu (Key Flag) designation and 15-year product warranty.
Scale indicators4 records
Recent moves8 records
Expansion highlights5 records
Tammerbitumi Oy competitors and assessment
Company assessmentDirect peers
- Peltisepänliike Kaasalainen Oy: Finnish metal roofing and sheet-metal fabrication company operating as a sister company under TEQT Group Finland. Comparable as a peer within the same group covering adjacent roofing categories (metal vs. bitumen), enabling cross-referral and shared customers.
- Solvikin Kattohuolto Oy: Finnish roofing services company (roof maintenance and repair) operating as a sister company under TEQT Group Finland alongside Tammerbitumi. Comparable as a direct peer in the same group performing overlapping flat-roof services in the Finnish market.
- Suomen Huopakatto Oy: Finnish bitumen roofing contractor acquired by Tammerbitumi in late 2023 and now operated as a wholly-owned subsidiary serving Northern Finland. Most directly comparable peer — same product category, same geography segment, same craft specialization.
Broad incumbents
- Protan AS: Norwegian roofing and waterproofing membrane manufacturer with both single-ply PVC membranes and bitumen systems, active across the Nordics. Comparable as a Nordic waterproofing/roofing membrane supplier competing for the same flat-roof specification decisions.
- ICOPAL Danmark / Icopal Nordic: Legacy Nordic bitumen roofing brand now part of BMI Group, distributing membranes and waterproofing systems across Denmark and the broader Nordics. Comparable as a competing incumbent bitumen/waterproofing brand overlapping with Tammerbitumi's specifications in cross-border projects.
- Derbigum (Aliaxis group): International manufacturer of bitumen-based waterproofing membranes with a focus on flat-roof applications and sustainability variants (e.g., recycled-content membranes). Comparable as a competing bitumen roofing membrane brand targeting similar commercial/industrial flat-roof specifications.
- Nordic Waterproofing (formerly Lemminkäinen): Major Nordic roofing and waterproofing group operating across multiple countries, offering bitumen and single-ply membranes plus installation services. Comparable as a directly relevant incumbent in the same roofing/waterproofing category, though at much larger scale and broader geographic scope.
- BMI Group (formerly Icopal / Braas Monier): Large European roofing products and solutions group producing bitumen membranes, single-ply systems, and pitched-roof products. Comparable as a bitumen-membrane manufacturer and installer-network owner overlapping directly with Tammerbitumi's product category.
Others
- Kerabit (Oy Kerabit Ab): Finnish bitumen roofing membrane manufacturer based in Lohja, supplier to Tammerbitumi and broader Finnish market. Comparable as the primary materials partner whose product portfolio (Nature, LESSNOX) Tammerbitumi specifies; an enabling/ecosystem participant rather than a competitor.
Regional players
- Katepal Oy: Finnish manufacturer of bitumen shingles and roofing membranes, founded in 1951 and based in Finland. Comparable as a Finnish bitumen roofing products maker operating in the same domestic market and product category as Tammerbitumi and its supplier Kerabit.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Tammerbitumi Oy social profiles
Digital presenceTammerbitumi Oy compliance and trust
Trust signalCompliance3 records
Tammerbitumi Oy financial estimates
Financial estimateRevenue estimate
Valuation estimate
Tammerbitumi Oy leadership team
Management profileNumber of profiles
Profiles9 records
Tammerbitumi Oy subsidiaries and ownership
Company hierarchySubsidiaries1 record
Tammerbitumi Oy funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Tammerbitumi Oy M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Tammerbitumi Oy
What does Tammerbitumi Oy do?
Tammerbitumi Oy is a Finnish bitumen roofing specialist that installs, renovates, and maintains bitumen (huopakatto) roofs for industrial, commercial, and residential buildings on a turnkey (avaimet käteen) basis. The company exclusively uses Kerabit-brand bitumen membranes manufactured in Lohja, Finland, offering standard, low-carbon (Nature), and air-purifying (LESSNOX) product variants, along with green roof systems and solar panel integration as add-on services.
Is Tammerbitumi Oy a public or private company?
Tammerbitumi Oy is a private company. It is classified as corporate owned and is currently operating.
When was Tammerbitumi Oy founded?
Tammerbitumi Oy was founded in 1991. It employs 11 to 50 people.
Where is Tammerbitumi Oy based?
Tammerbitumi Oy is headquartered in Tampere, Finland, in the Europe region.
How does Tammerbitumi Oy make money?
Two revenue lines are on record. Bitumen Roofing Installation Services are the primary driver. The others are roof Maintenance and Repair Services.
Who are Tammerbitumi Oy's main competitors?
Direct peers on record are Peltisepänliike Kaasalainen Oy, Solvikin Kattohuolto Oy and Suomen Huopakatto Oy. Broad incumbents are Protan AS, ICOPAL Danmark / Icopal Nordic, Derbigum (Aliaxis group), Nordic Waterproofing (formerly Lemminkäinen) and BMI Group (formerly Icopal / Braas Monier). Kerabit (Oy Kerabit Ab) is listed as an others. Katepal Oy is listed as a regional player.
Does Tammerbitumi Oy have an API?
No public API is recorded for Tammerbitumi Oy.
What industry is Tammerbitumi Oy in?
Tammerbitumi Oy's product category is Commercial Roofing Services. Its primary akta.pro industry code is IMAFAMAA, Roofing Systems & Waterproofing (Membranes, Shingles, TPO/EPDM, Liquid-Applied), with a secondary code of HSAGAKAE, Flat Roof Repair & Membrane Restoration (TPO/EPDM/PVC/Built-Up). Its NAICS code is 238160 and its SIC code is 2950.