The 5 Most Common Mistakes in Firestopping—and How to Avoid Them

Fire safety is a critical concern for everyone in the construction industry, from architects and builders to property owners and tenants. At Firestoppers ., Ireland’s leading passive fire prevention specialists based in Dublin, we’ve seen firsthand how even minor oversights in firestopping can lead to significant risks.

In this article, we’ll delve into the five most common mistakes made in firestopping across Ireland and provide expert advice on how to avoid them. By addressing these issues early, you can ensure your building is not only compliant with Irish fire safety regulations but also truly safe for all occupants.


1. Using Non-Certified Firestopping Products

The Mistake

One of the most critical errors we encounter is the use of firestopping products that lack proper certification or third-party accreditation. This often happens when contractors opt for cheaper, uncertified materials to cut costs.

Why It’s a Problem

  • Non-Compliance: Irish Building Regulations require that all firestopping materials meet specific standards. Using uncertified products can lead to non-compliance issues.
  • Safety Risks: Uncertified products haven’t undergone rigorous testing, making their performance in a fire unpredictable.
  • Legal Consequences: In the event of a fire, liability can fall on the parties responsible for using non-compliant materials.

How to Avoid It

  • Always Use Certified Products: Ensure that all firestopping materials are certified by reputable third-party organizations like NSAI (National Standards Authority of Ireland) or carry the CE marking.
  • Verify Documentation: Request and keep records of all certification documents for the products used.
  • Stay Updated: Regulations change; make sure you’re using products that meet the latest standards.

2. Incorrect Selection of Firestopping Materials

The Mistake

Using the wrong type of firestopping material for a specific application is a common oversight. For example, employing standard polyurethane (PU) foam fillers—often misleadingly marketed as ‘fire foam’—in inappropriate situations.

Why It’s a Problem

  • Ineffective Barrier: The wrong material won’t provide the necessary fire resistance, allowing flames and smoke to spread.
  • False Sense of Security: Thinking a building is safe when it’s not can have disastrous consequences.
  • Regulatory Issues: Misapplication can result in non-compliance with Technical Guidance Document B (Fire Safety) of the Irish Building Regulations.

How to Avoid It

  • Consult Experts: Work with fire safety specialists to select the right materials for each application.
  • Follow Manufacturer Guidelines: Use materials strictly as intended and tested.
  • Avoid Shortcuts: Don’t substitute specified materials with cheaper alternatives without proper evaluation.

3. Neglecting Firestopping Altogether

The Mistake

Amazingly, we still encounter buildings where firestopping measures have been completely omitted, especially around service penetrations like pipes, ducts, and cables.

Why It’s a Problem

  • Uncontrolled Fire Spread: Openings allow fire and smoke to move freely between compartments, negating any passive fire protection.
  • Increased Risk to Life and Property: Occupants have less time to evacuate, and the building sustains more damage.
  • Legal Repercussions: Failing to implement required firestopping measures violates building regulations and can lead to severe penalties.

How to Avoid It

  • Thorough Planning: Incorporate firestopping requirements from the earliest design stages.
  • Regular Inspections: Schedule inspections at key construction phases to ensure firestopping is installed where needed.
  • Education and Training: Ensure all team members understand the importance of firestopping.

4. Delaying Firestopping Considerations Until Late in the Project

The Mistake

Firestopping is often an afterthought, considered only when construction is well underway or nearly complete.

Why It’s a Problem

  • Design Conflicts: Late-stage changes can clash with existing designs, leading to compromises.
  • Increased Costs: Retrofitting firestopping solutions is usually more expensive and time-consuming.
  • Inefficient Solutions: Hasty fixes may not offer the best protection or may be improperly installed.

How to Avoid It

  • Early Integration: Include firestopping in the design phase.
  • Collaborative Approach: Engage all stakeholders—including architects, engineers, and fire safety experts—from the beginning.
  • Use BIM Models: Implement Building Information Modeling to identify and resolve issues early.

5. Poor Installation Practices

The Mistake

Even when the right products are specified and procured, improper installation can render them ineffective.

Why It’s a Problem

  • Compromised Safety: Incorrect installation can lead to gaps or weaknesses in fire barriers.
  • Wasted Resources: The cost of materials and labour is squandered if the installation doesn’t meet standards.
  • Inspection Failures: Poor workmanship can lead to failed inspections and project delays.

How to Avoid It

  • Hire Certified Professionals: Use installers who are certified
  • Training and Supervision: Ensure all installers are adequately trained and supervised.
  • Quality Assurance: Implement strict quality control measures and document all installations.

At Firestoppers., we’re committed to helping you achieve the highest standards of fire safety. With decades of experience and a team of certified professionals, we provide comprehensive firestopping solutions tailored to your specific needs.


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