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CNAE 4329-1/05 · Brazil

Tratamentos térmicos, acústicos ou de vibração

3,582 active companies in the Brazilian CNPJ registry have this CNAE as their main activity. Look up companies and explore their distribution by state and city.

Source: Receita Federal, CNPJ Open Data · October 2026 publication

What this list shows

We count each active company in the Brazilian CNPJ registry once, by its head office and this CNAE as its main activity. Branches and secondary activities are excluded from this scope. The total describes the registry, not market revenue or company quality.

Active companies
3,582
493rd of 1,329 activities
Opened in 12 months
730
+10.3% · 400th by openings
Of every 100 companies in the country
0.0
do this activity
Openings per 100 active
20
in the country: 21

Active companies in this activity

More active establishments and higher registered capital first. This order is not a quality assessment or recommendation.

Look up companies in this activity (up to 300)

How to assess a company's data

When you open a company's record, use these guides to check the data and understand what each field can establish.

Where the companies are

Acre: 3 companies, 0.0 of every 100 active companies there Alagoas: 40 companies, 0.0 of every 100 active companies there Amapá: 0 companies, 0.0 of every 100 active companies there Amazonas: 33 companies, 0.0 of every 100 active companies there Bahia: 133 companies, 0.0 of every 100 active companies there Ceará: 72 companies, 0.0 of every 100 active companies there Distrito Federal: 63 companies, 0.0 of every 100 active companies there Espírito Santo: 97 companies, 0.0 of every 100 active companies there Goiás: 173 companies, 0.0 of every 100 active companies there Maranhão: 22 companies, 0.0 of every 100 active companies there Mato Grosso: 66 companies, 0.0 of every 100 active companies there Mato Grosso do Sul: 56 companies, 0.0 of every 100 active companies there Minas Gerais: 327 companies, 0.0 of every 100 active companies there Pará: 52 companies, 0.0 of every 100 active companies there Paraíba: 25 companies, 0.0 of every 100 active companies there Paraná: 193 companies, 0.0 of every 100 active companies there Pernambuco: 98 companies, 0.0 of every 100 active companies there Piauí: 15 companies, 0.0 of every 100 active companies there Rio de Janeiro: 306 companies, 0.0 of every 100 active companies there Rio Grande do Norte: 19 companies, 0.0 of every 100 active companies there Rio Grande do Sul: 190 companies, 0.0 of every 100 active companies there Rondônia: 14 companies, 0.0 of every 100 active companies there Roraima: 0 companies, 0.0 of every 100 active companies there Santa Catarina: 252 companies, 0.0 of every 100 active companies there São Paulo: 1,298 companies, 0.0 of every 100 active companies there Sergipe: 15 companies, 0.0 of every 100 active companies there Tocantins: 17 companies, 0.0 of every 100 active companies there

Weight in each federative unit: of every 100 active companies, how many have this main activity

  1. 0.0
  2. 0.0
  3. 0.0
  4. 0.0
  5. 0.0

Federative units with the most companies

  1. 1 São Paulo 1,298
  2. 2 Minas Gerais 327
  3. 3 Rio de Janeiro 306
  4. 4 Santa Catarina 252
  5. 5 Paraná 193
  6. 6 Rio Grande do Sul 190
  7. 7 Goiás 173
  8. 8 Bahia 133
  9. 9 Pernambuco 98
  10. 10 Espírito Santo 97
See the 25 federative units
  1. 11 Ceará 72
  2. 12 Mato Grosso 66
  3. 13 Distrito Federal 63
  4. 14 Mato Grosso do Sul 56
  5. 15 Pará 52
  6. 16 Alagoas 40
  7. 17 Amazonas 33
  8. 18 Paraíba 25
  9. 19 Maranhão 22
  10. 20 Rio Grande do Norte 19
  11. 21 Tocantins 17
  12. 22 Piauí 15
  13. 23 Sergipe 15
  14. 24 Rondônia 14
  15. 25 Acre 3

Cities with the most companies

active companies by head office

  1. 1 São Paulo (SP) 346
  2. 2 Barrinha (SP) 183
  3. 3 Rio de Janeiro (RJ) 112
  4. 4 Belo Horizonte (MG) 77
  5. 5 Brasília (DF) 63
  6. 6 Curitiba (PR) 47
  7. 7 Salvador (BA) 45
  8. 8 Anápolis (GO) 45
  9. 9 Fortaleza (CE) 41
  10. 10 Campinas (SP) 40
See the 30 cities
  1. 11 Goiânia (GO) 40
  2. 12 Duque de Caxias (RJ) 31
  3. 13 Manaus (AM) 30
  4. 14 Recife (PE) 30
  5. 15 Guarulhos (SP) 30
  6. 16 Porto Alegre (RS) 30
  7. 17 Campo Grande (MS) 30
  8. 18 São Bernardo do Campo (SP) 29
  9. 19 Uberlândia (MG) 27
  10. 20 Joinville (SC) 25
  11. 21 Contagem (MG) 24
  12. 22 São José dos Campos (SP) 23
  13. 23 Blumenau (SC) 23
  14. 24 Maceió (AL) 22
  15. 25 São Gonçalo (RJ) 22
  16. 26 Santo André (SP) 22
  17. 27 Canoas (RS) 22
  18. 28 Belém (PA) 21
  19. 29 Ribeirão Preto (SP) 20
  20. 30 Florianópolis (SC) 20

What activity 4329-1/05 is

  1. Section F — Construção
  2. Division — Serviços especializados para construção
  3. Group — Instalações elétricas, hidráulicas e outras instalações em construções
  4. Class — Obras de instalações em construções não especificadas anteriormente

What it covers

  • Os serviços de tratamento térmico, acústico ou de vibração

Typical activities

  • Instalação de almofadas térmicas e acústicas para construção civil
  • Instalação de forros e placas acústicas
  • Instalação de painéis acústicos
  • Instalação de sistema de isolamento acústico e térmico
  • Instalação de sistemas de amortecimento (atenuação) e controle de vibrações e ruídos em edificações
  • Instalação de sistemas de amortecimento de vibrações em edificações
  • Instalação de sistemas de monitoramento dinâmico de vibrações em estruturas diversas
  • Isolamento térmico (construção)
  • Isolamentos térmicos ou acústicos em lajes, telhados, telhas, paredes, reservatórios, tanques, etc., aplicação de
  • Mantas de polietileno expandido em paredes e forros para tratamento térmico ou acústico, colocação de
  • Mantas ou placas de lã de rocha ou lã de vidro em paredes e forros para tratamento térmico ou acústico, colocação de
  • Serviços de aplicação de materiais refratários na construção
See the other 2 typical activities
  • Tratamento acústico e térmico, reparação ou manutenção de
  • Tratamentos acústicos e térmicos (construção)

Source: IBGE, CNAE 2.3 and its explanatory notes

The activities of class 4329-1

obras de instalações em construções não especificadas anteriormente, by subclass

Frequently asked questions about CNAE 4329-1/05

How many CNAE 4329-1/05 companies are there in Brazil?

3,582 active companies have CNAE 4329-1/05 as their main activity, according to the Receita Federal's October 2026 publication. It is 493rd among the country's activities by companies.

Which activities make up class 4329-1?

Class 4329-1 has 6 subclasses: 4329-1/01; 4329-1/02; 4329-1/03; 4329-1/04; 4329-1/05; 4329-1/99. The official names are in the subclass table. A company declares one main activity and may declare others as secondary activities.

Which federative unit has the most companies in this activity?

São Paulo, with 1,298. There, 0.0 of every 100 active companies have this main activity, against 0.0 in the national registry.

Does this total include branches and secondary activities?

No. Each active company is counted once, by its head office and registered main activity. A company may carry out this activity as a secondary activity and be excluded from the count. Geographic distribution uses the registered location; records without a recognized federative unit may be counted nationally without appearing in local groups.

Does active status mean a company is qualified for a contract?

No. Active status describes the Receita Federal registration. It does not establish tax compliance, creditworthiness, licences, ability to fulfil a contract or quality. Check the relevant official documents and the contract's requirements.

How we count

Active companies in the Brazilian CNPJ registry with this as their main activity, counted once by head office. Location is taken from the registry. Where available, openings are for the last 12 months, compared with the previous 12 months.