Passive fire protection generates a consistent stream of questions from architects, structural engineers, developers, main contractors, and building owners across Ireland and Northern Ireland. Some questions arise from genuine uncertainty about the regulations. Others reflect a need to understand how the specification translates into practical construction activity on site. Many come from people who are encountering passive fire protection requirements for the first time on a new project type or in a new building category.
This article answers the most common questions about passive fire protection in Ireland clearly and directly. It is not a substitute for specific technical advice on a particular project, but it provides the foundational understanding that helps every member of a commercial construction team engage with fire protection requirements more effectively.
FireShield Ireland carries out passive fire protection and structural steel fireproofing on commercial buildings across all 32 counties of Ireland and throughout Northern Ireland. For project-specific advice contact us directly. Our full range of services is at https://fireshieldireland.com/services/passive-fire-protection/.
General Questions About Passive Fire Protection
What is the difference between passive and active fire protection?
Active fire protection systems require activation to perform their function. Sprinkler systems, smoke detectors, fire alarms, and emergency lighting all need a trigger or power supply to operate. Passive fire protection requires nothing to activate it. It performs its function simply by being present in the construction of the building. A steel column protected with Monokote does not need a signal or power supply to resist the transfer of heat to the steel during a fire. The protection is built in.
Both are mandatory on most commercial buildings in Ireland. Both contribute to the overall fire safety strategy in different but complementary ways. Neither is a substitute for the other.
Is passive fire protection required on all commercial buildings in Ireland?
Yes, on virtually all commercial buildings of any significance. The specific requirements depend on the purpose group of the building and its height, as set out in Technical Guidance Document B in the Republic of Ireland and Technical Booklet E in Northern Ireland. For steel-frame commercial buildings, which includes the majority of medium and large commercial buildings in Ireland, structural steel fireproofing is a mandatory element of building control compliance.
Can passive fire protection requirements be reduced if a sprinkler system is installed?
In some cases yes, but not eliminated. Technical Guidance Document B allows certain relaxations of compartment size limits where a sprinkler system is installed in a warehouse or industrial building. For structural fire resistance, the presence of a sprinkler system may allow a reduction in the required fire resistance period for elements of structure in some building types. These relaxations are specific to particular configurations and must be assessed by a fire engineer for each project. They do not remove the structural fire resistance requirement entirely.
Who is responsible for specifying passive fire protection on a commercial project?
Passive fire protection is specified by the architect, structural engineer, or fire engineer depending on the element in question. Structural fire resistance, meaning the fireproofing of structural steel, is typically specified by the structural engineer who determines the required fire resistance period and the structural section sizes. Fire compartmentation and fire stopping are typically specified by the architect. Where the fire safety design is complex, a specialist fire engineer may be appointed to develop the overall fire safety strategy and co-ordinate the passive fire protection specification.
Questions About Monokote
What is Monokote and how does it work?
Monokote is a spray-applied cementitious fireproofing product manufactured by GCP Applied Technologies. It is mixed with water on site and applied directly to the surface of structural steel using specialist spray equipment. The applied coating has very low thermal conductivity, which means it slows the rate at which heat is conducted from a fire to the steel surface. By slowing the temperature rise in the steel, Monokote extends the time it takes for the steel to reach its critical temperature, the point at which it can no longer carry its design load. This extension of time is the fire resistance period achieved by the product.
Who can apply Monokote in Ireland?
FireShield Ireland is the only licensed Monokote applicator in Ireland, covering both the Republic of Ireland and Northern Ireland. Any project in Ireland specifying Monokote for structural steel fireproofing is carried out by our team. There is no alternative licensed Monokote applicator operating anywhere in Ireland. Full details of our Monokote service are at https://fireshieldireland.com/services/monokote-spray/.
How is the required Monokote thickness determined?
The required thickness for any structural member is calculated from the certified fire resistance test data for the specific Monokote grade using the section factor of the structural member and the required fire resistance period. The section factor is the ratio of the heated perimeter of the section to its cross-sectional area. Different section sizes have different section factors, which means a single project will typically have several different required thicknesses for different member types. We produce a project-specific thickness schedule from the structural drawings for every project.
Can Monokote be applied in wet or cold conditions?
Monokote must be applied within the temperature and humidity limits specified by the manufacturer. It cannot be applied to wet or frozen surfaces, and the ambient temperature during application must be above a specified minimum. In Irish winter conditions the temperature and humidity on an open construction site may require heating of the work area before application can proceed. We assess site conditions before mobilising to any project and advise on any environmental conditioning requirements.
How long does Monokote take to dry?
In typical Irish construction site conditions, Monokote applied at standard thicknesses is sufficiently dried and hardened to allow careful follow-on trade activity within 24 to 48 hours of application. Full cure takes longer and the steel should not be subjected to significant impact loading until the curing process is complete. In cold or humid conditions drying may take longer and we advise on expected drying times at the programme planning stage for each project.
Can Monokote be painted or decorated?
Monokote in its standard form has a rough, textured finish that is appropriate for concealed steelwork but is not suitable for architectural applications where a smooth decorative finish is required. Where Monokote is used in areas that will be visible, it can be painted with a compatible coating to improve its appearance, though the result will still not match the quality of a thin film intumescent coating applied to exposed steel.
Is Monokote damaged by water?
Monokote in its dry, cured state has reasonable resistance to intermittent wetting but is not designed for permanent wet or immersed applications. On a construction site where the steel is exposed to weather before the roof is complete, temporary protection of applied Monokote from direct rainfall may be required. For applications in permanently wet or high-humidity environments, a different product or a protective coating over the Monokote may be necessary.
Questions About Intumescent Coatings
What is an intumescent coating and how does it differ from conventional paint?
An intumescent coating looks similar to a conventional paint at ambient temperatures. The difference appears when the coating is exposed to fire temperatures, typically above 200 degrees Celsius. At this point the chemical components of the coating react and expand to many times the original thickness, forming a carbonaceous char layer that insulates the steel beneath from the heat of the fire. Conventional paint does not do this. Its only fire-related effect is to burn, which contributes to the fire rather than protecting against it.
Can intumescent coatings be specified in any colour?
Yes. Thin film intumescent coatings can be finished with a topcoat in any specified colour. The topcoat must be compatible with the intumescent system, but within that constraint the colour can be specified to match any project colour scheme. Intumescent coatings are regularly specified in RAL colours to co-ordinate with architectural colour schemes on high-specification commercial projects.
How thick is a thin film intumescent coating?
The dry film thickness of a thin film intumescent coating ranges from approximately 0.5 millimetres to 5 millimetres depending on the structural section being protected and the required fire resistance period. At these thicknesses the coating is not visible as a significant build-up on the steel surface and the finish quality is comparable to a conventional paint.
How long does intumescent coating last?
A properly specified and installed thin film intumescent coating in a normal commercial building interior has a design life of 25 years or more. The actual durability depends on the exposure conditions, the quality of the surface preparation, and whether the coating is subject to regular impact or abrasion. In harsh environments, such as high-humidity spaces or areas with frequent physical contact, shorter inspection intervals and periodic recoating may be required.
Can intumescent coatings be applied in the fabrication shop?
Yes. Many intumescent coating projects in Ireland are carried out in the steel fabrication shop before the steel is delivered to site. Shop application allows better control of surface preparation and application conditions and can result in a higher quality finish. The applied coating must be protected during transportation and erection, and any damage to the coating on site must be repaired and re-verified before the installation can be signed off.
What happens if intumescent coating is damaged on site?
Damage to intumescent coating during transportation, erection, or subsequent construction activity must be repaired. The repair process involves removing the damaged material back to a sound edge, cleaning and preparing the substrate, and applying fresh coating to achieve the required dry film thickness. The repaired area must be re-measured to confirm it meets the specification. All repairs must be documented and included in the completion documentation. Full details of our intumescent coating service are at https://fireshieldireland.com/services/intumescent-coatings/.
Questions About Building Control and Compliance
Do I need a Fire Safety Certificate for my commercial building in Ireland?
In the Republic of Ireland, a Fire Safety Certificate is required for new buildings used for certain purposes, extensions to such buildings, and material changes of use of existing buildings. The relevant purposes include most commercial, industrial, and institutional building types open to the public or used by employees. The certificate must be obtained from the local authority fire service before construction begins.
In Northern Ireland, building control is administered by district councils under the Building Regulations (Northern Ireland) 2012. The process differs from the Fire Safety Certificate system in the Republic but requires equivalent demonstration of compliance with Part E of the Building Regulations.
What documentation does the fire protection contractor need to provide for building control?
The fire protection contractor should provide product data sheets and technical certificates for the fireproofing system applied, fire resistance calculations confirming the required fire resistance period for each structural section type, the project-specific thickness schedule, quality control records from the installation, a record of any remedial work carried out, and a completion certificate. FireShield Ireland provides all of this documentation as standard on every project, without needing to be asked.
Can I get a completion certificate for my building if the fire protection documentation is missing?
In the Republic of Ireland, the completion certificate submitted to the local authority confirms that the building as built complies with the Building Regulations, including Part B. Without documentation from the fire protection contractor confirming that the structural steel fireproofing has been installed to the required specification, the person submitting the completion certificate cannot make this confirmation with confidence. In practice, missing fire protection documentation is a common cause of delays in the completion certificate process on Irish commercial projects.
Who enforces fire protection requirements in Ireland?
In the Republic of Ireland, building control is enforced by local authority building control departments. Fire safety certification is processed by local authority fire services. The Health and Safety Authority has enforcement powers in relation to construction site safety. In Northern Ireland, building control is enforced by district councils. The Fire and Rescue Service Northern Ireland has enforcement powers in relation to the fire safety of occupied premises under the Fire and Rescue Services (Northern Ireland) Order 2006.
Questions About Programme and Cost
How much does structural steel fireproofing cost?
The cost of structural steel fireproofing depends on the volume of steel to be treated, the thickness required, the system used, and the access conditions on site. Monokote spray applied fireproofing is generally more cost-effective than intumescent coating for large volumes of concealed structural steel. Intumescent coating costs more per square metre but is necessary for exposed architectural steel. We provide a free quotation for any project based on the structural drawings and the specification. Contact us for a preliminary cost estimate.
How long does structural steel fireproofing take on a commercial project?
The time required depends on the volume of steel, the required thickness, the access conditions, and the configuration of the building. For a typical multi-storey commercial office building the fireproofing of each floor takes between two and five days depending on the floor plate size and the complexity of the steel layout. For a large single-storey warehouse the entire building fireproofing may take one to two weeks. We provide a programme estimate for every project based on the structural drawings.
When in the construction programme should the fire protection contractor be engaged?
At the pre-construction stage, before the structural steel erection begins. Engaging the fire protection contractor early allows the primer compatibility to be confirmed before the steel is fabricated and primed, the fireproofing programme to be integrated into the overall construction programme before it is finalised, and any technical questions about the specification to be resolved before the contract is awarded. Late engagement of the fire protection contractor is one of the most common causes of programme problems and cost increases on Irish commercial projects involving structural steel fireproofing.
Getting Answers to Your Specific Questions
The questions and answers above cover the most common queries that arise on commercial construction projects in Ireland and Northern Ireland. For project-specific questions that are not covered here, contact FireShield Ireland directly.
We provide technical advice on passive fire protection, Monokote specification, intumescent coating selection, and building control compliance for commercial projects at any stage of the design or construction process. There is no charge for preliminary technical advice and we are available to attend design team meetings or site visits to discuss specific project requirements.
https://fireshieldireland.com/services/passive-fire-protection/
https://fireshieldireland.com/services/structural-steel-fireproofing/
North: +447340781054 South: +353871128539