Overview
4proof provides consulting and technical support for waterproofing and thermal insulation of buildings and structures, from project documentation and material selection to supervision of the work. Its services include post-warranty maintenance, leak detection, thermographic surveys and legal support; the company has over 40 years of experience in insulation work and more than 250 completed projects.
Financials
Revenue history
Filing timeliness
2 of 6 financial statements were filed late (the longest delay 143 days for 2023).
- 202522/06/2026
- 202414/04/2025
- 202305/12/2024
- 202203/07/2023
- 202107/10/2022
- 202015/10/2021
Data and insights are generated automatically from financial statements – they may contain errors and are neither a credit assessment nor business advice.
Statistics
How the company ranks by revenue within its industry, region and across Poland in 2025.
Results vs industry
Industry
Offer
- Insulation consultancy
- Waterproofing
- Thermal insulation
- Roof insulation
- Terrace and balcony insulation
- Foundation insulation
- Thermal imaging surveys
- Insulation works supervision
Website technology
- Website
- WordPress
Authorized Representatives
Manner of representation
To represent the company and make declarations of will concerning and not concerning property on behalf of the company, where there is a one-person management board, the President of the Management Board is authorised; where there is a multi-member management board, each member of the management board is authorised to dispose of rights and incur obligations up to the amount of PLN 30,000 (thirty thousand zlotys) and in matters not concerning property, independently, while above the amount of PLN 30,000 (thirty thousand zlotys), joint action by all members of the management board is required.
Ownership
| Owner | Shares | Share value | Stake |
|---|---|---|---|
Piotr Konrad Gronertage 47 | 234 | $3,160.45 | 39% |
Bartosz Kalinowskiage 31 | 132 | $1,782.82 | 22% |
Michał Krasińskiage 42 | 234 | $3,160.45 | 39% |
Beneficial owners
| Person | Rights |
|---|---|
Bank accounts
Registered as a VAT taxpayer on 2019-10-25.
68 1020 3408 0000 4302 0459 9041
Debt
No entries in the National Debtors Register (KRZ).
Public aid
No public aid cases recorded in the last 10 years.
Change history
| Date | Event | |
|---|---|---|
| 2024-04-09 | Business resumed | |
| 2023-07-25 | Business suspended | |
| 2019-09-09 | Entered in the register |
FAQ
Last updated: 2026-06-22