Specialist in passive fire prevention and structural fire protection
Application of fire-resistant solutions for all penetrations.
Call 06 - 3815 2369 Mon-Fri 07:00 - 17:30
Trusted by, among others
View projectsComplete fire protection, from advice to maintenance
Eight core services that together ensure a demonstrably fire-safe building, carried out by one certified team.
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Fire-Resistant Seseals
Certified sealing of cable, pipe, and duct penetrations so that fire and smoke compartments remain intact.
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Fire-Resistant Steelcladding
Protect the load-bearing capacity of your steel structure for up to 120 minutes in a fire, without compromising the design.
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Fire-Resistant Glass
Compartmentalize with glass: preserve natural light and sightlines without compromising on fire safety.
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Fire-Resistant Doors
Custom-made fire-resistant doors and frames that protect escape routes against fire and smoke for up to 60 minutes.
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Fire dampers
Automatic fire dampers in your ventilation system prevent fire and smoke from spreading through the ducts.
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Fire-Resistant Separstructures
Walls, ceilings, and flame barriers that divide your building into safe, manageable fire compartments.
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Consultancy & Assessment
From quickscan to full inventory: we clearly map out the fire safety of your building.
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Maintenance & Inspection
Periodic inspection and maintenance keep your fire protection provisions demonstrably in order.
View serviceEvery industry has its own fire safety requirements
From 24/7 care environments to high-tech production halls: we know the risks and the regulations per sector.
All sectorsFrom advice to logbook, all under one roof
Instead of separate firms for advice, execution, and management, you arrange everything with one certified party. No gaps between disciplines, one file that is always accurate.
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01
Advice & inspection
Quickscan, inventory, and assessment of the WBDBO. We map out the risks and legal requirements of your building.
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02
Certified realization
Six execution disciplines, from seals and doors to steel cladding and compartmentalization, installed by one team.
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03
Management & logbook
Periodic inspection, registration per provision, and a logbook that we maintain for you, so you can demonstrate the duty of care.
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Certified craftsmanship you can verify
We combine technical depth with clear communication. From the first consultation to delivery and the maintenance afterward, you always know where you stand.
- Kiwa K21050, VCA, and ISO 9001: execution, safety, and quality externally assessed
- One fixed point of contact from survey to delivery and aftercare
- Logbook per building: demonstrable duty of care toward insurer and competent authority
- Transparent, itemized quotes with no surprises afterward
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Kiwa K21050
Structural fire safetyIndependently assessed on the execution of structural fire safety: seals, doors, and structures as intended.
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VCA
Safe and healthy workingOur team demonstrably works safely on the construction site and in buildings that remain in use.
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ISO 9001
Quality managementA fixed working method and quality assurance on every project, from intake and quote to delivery.
During an inspection, you can prove it in a single click
Every seal, door, damper, and construction receives a unique number. In the logbook that we maintain for you, you can see on the floor plan what is in order and what needs attention, with photos and certificates per point.
- Demonstrable duty of care toward insurer and competent authority
- New penetrations recorded immediately after a renovation
- Execution and documentation in one hand, so always up to date
- Seal AF-11Cable penetration · 60 mininspected 03-2026
- Fire damper BK-04Ventilation duct · 60 mintested 01-2026
- Door DR-21Escape route · 30 minadjustment scheduled
- Seal AF-38Pipe penetration · 90 minrepair required
Trusted at leading buildings
From office renovation in occupied use to high-tech production: fire protection without halting operations.
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De Nederlandsche Bank
Complete upgrade of the fire compartmentalization during a large-scale office renovation.

Cooltower
Fire-safe compartmentalization in a mixed residential and office high-rise project.

WTC Amsterdam
Fire-safe compartmentalization and doors in a continuously leased multi-tenant office complex.

ASML Veldhoven
Fire-resistant protection of steel structures and technical penetrations in a high-tech production environment.
Your fire protection specialist, active throughout the Netherlands
Grazy Brandwering is based at Oude Middenweg in Den Haag (Forepark, Den Haag-Ypenburg). From here, we work daily throughout the Netherlands.
We are also available for projects abroad, including Switzerland, Russia, and the Gulf states.
- Fire protection Den HaagSeals, fire doors, and compartmentalization
- Fire protection RotterdamCompartmentalization, fire-resistant glass, and fire dampers
- Fire protection Zuid-HollandFire protection for businesses throughout the province
- Fire protection UtrechtFire compartmentalization for offices and institutions
- Fire protection AmsterdamCompartmentalization for multi-tenant offices
- Fire protection EindhovenSteel cladding for high-tech production and logistics
- Fire protection Noord-BrabantSteel cladding and compartmentalization for industry
Grazy Brandwering
Oude Middenweg 231-W2491 AG Den Haag 06 - 3815 2369 info@grazybrandwering.nl Monday to Friday: 07:00 - 17:30
Grazy Brandwering B.V. · KVK 94462186
What clients say
“From the first consultation to delivery, they thought proactively along with us. Clearly communicated, and the schedule was followed flawlessly.”
“Craftsmanship that stands out: tidy finishing, clear reporting, and a team that knows exactly what it's talking about.”
“Pleasant cooperation, even amid the dynamics of a building full of tenants. They really think along with you instead of just executing.”
“Clear quote, tidy execution, and a logbook that makes our insurer happy. Exactly what we needed.”
Answers to the questions we get asked most often
Don't see your question listed? Call or email us, or view all frequently asked questions about fire protection, costs, and regulations.
A fire protection company takes care of a building's passive fire safety: the structural provisions that keep fire and smoke within a compartment. Think of fire-resistant seals for cable and pipe penetrations, fire doors, fire-resistant glass, fire dampers, separating walls and the protection of steel structures. Grazy Brandwering advises on, installs and maintains these provisions, and records everything in a logbook.
Kiwa is an independent certification body; the Kiwa certificate K21050 for structural fire safety means the execution is periodically assessed externally. This results in work carried out to fixed standards, verifiably documented, with a stronger record toward insurers and the competent authority.
The owner is responsible for the building meeting the requirements of the Besluit bouwwerken leefomgeving (Bbl); the user must use the building in a fire-safe manner. Provisions that no longer work due to renovations or wear also fall under this. Periodic inspection and an updated logbook make that responsibility demonstrable.
From our location at the Forepark business park in Den Haag: usually within 30 minutes in Den Haag and the direct surroundings, and about 25 minutes in Rotterdam. In the rest of Zuid-Holland usually within a few working days; for Utrecht, Amsterdam and the rest of the Netherlands by appointment.
Via the quote request form, by email or by phone at 06 - 3815 2369. After a brief conversation about the building and your question, an on-site survey follows if needed, and then an itemized quote with scope, planning and choice of materials. No clear picture yet? The free online quickscan gives a first indication.
Latest insights
Practical explanation of WBDBO, the duty of care under the Bbl, and what fire protection costs.
All articles
WBDBO explained: what the requirement means and how you comply with it
WBDBO is the core of compartmentalization. We explain what the requirement means, how it is determined, and what is expected of you.
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Fire safety duty of care under the Bbl: what you as an owner must demonstrate
The duty of care under the Bbl places responsibility for a 'sufficient level of fire safety' with the owner. What does that mean in practice?
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Fire-resistant penetrations: types, requirements (NEN-EN 1366-3), and what it costs
Every cable or pipe through a fire separation is a potential weak point. The sealing systems available, the requirements, and what it costs.
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