Portfolio

 

A Selection of Our Work & Case Experience

At DUNN, our work spans a wide range of complex façade, cladding and building envelope projects across the UK.

We are frequently instructed on sensitive, high-value matters where discretion is essential. For that reason, the examples below focus on how we work, the challenges we are trusted to resolve, and the value we deliver — rather than confidential project detail.

Each project demonstrates our technical expertise, collaborative approach, and commitment to clear, defensible outcomes for our clients.

Building: Greengate
Scope: Fire Door Remediation

DUNN were appointed to assess the condition and compliance of fire doors throughout the building, ensuring alignment with current fire safety standards and best practice.

Our works included a comprehensive inspection of all existing fire doors, identifying areas of non-compliance and advising on appropriate remedial action. Where feasible, doors were upgraded through targeted remediation works, including the replacement of seals, ironmongery and door closures. In instances where repair was not viable, new certified fire doors were installed.

All works were completed with full certification, providing assurance that the fire door installations met current regulatory requirements and delivered the necessary level of fire protection.

Building: Milliners Wharf
Scope: Car Park Insulation Installation & Protection Steel Encasement

DUNN were engaged to deliver insulation and protective works within the car park area, with a focus on thermal performance, fire safety and long-term durability.

The scope of works included the installation of thermal insulation to the car park ceiling, improving performance while ensuring compatibility with the existing structure. In addition, protective steel encasements were installed to critical load-bearing columns and beams, providing enhanced fire protection and resilience.

All works were carried out in accordance with relevant building regulations and fire safety requirements, ensuring the completed installation met current standards and delivered a robust, compliant solution.

Building: Shoe Factory
Scope: Cavity Barrier Replacement

DUNN were appointed to undertake cavity barrier replacement works to address fire safety and compliance within the building envelope.

The project involved the careful removal of existing non-compliant cavity barriers, followed by the installation of new fire-rated barriers within external wall cavities. These were installed above compartment walls and around openings such as doors and windows, ensuring continuity of fire separation throughout the structure.

All affected areas were fully made good on completion, maintaining the building’s appearance, weather resistance and overall integrity, while delivering a compliant and effective fire-stopping solution.

Building: Burlington House
Scope: Fire Door Remediation

DUNN were commissioned to carry out a full assessment of fire doors throughout the building, with the objective of confirming compliance and improving overall fire safety performance.

A detailed survey was undertaken to evaluate the condition and functionality of each fire door. Where deficiencies were identified, targeted remediation works were completed, including adjustments and replacement of seals, ironmongery and door closures. Doors that could not be economically or safely repaired were replaced with new, certified fire door sets.

Upon completion, all fire doors were certified in line with current standards, providing the client with clear assurance of compliance and a documented record of works carried out.

Building: The Bank
Scope: Cavity Barrier Replacement

DUNN were instructed to undertake cavity barrier replacement works as part of a wider fire safety compliance programme within the building.

The project involved the removal of existing cavity barriers that no longer met current requirements, followed by the installation of new fire-rated barriers within external wall cavities. Particular attention was given to maintaining effective fire separation above compartment walls and around structural openings, including doors and windows.

All works were completed with full making good to affected areas, ensuring the building’s appearance, weatherproofing and fabric were preserved while delivering a compliant and robust fire-stopping solution.

Testimonials
  • Working with Dunn has been an absolute pleasure. Their team's professionalism, attention to detail, and commitment to delivering results with no fuss has consistently stood out to me. From the initial conversation to the on-site implementation, Dunn has always been on point, ensuring that our needs were met hassle free. Their expertise and dedication has truly made an impact.
    Stuart Tarr
    Taylor Wimpey
  • Hydrock have worked with Dunn on multiple projects across the UK where they have provided access to allow façade inspections in support of PAS 9980 Fire risk appraisal of external wall construction and cladding (FRAEW). Dunn are a very professional and conscientious organisation which ensures all stakeholder expectations are met.
    Steve Walker
    Hydrock
  • We have worked with Dunn across of projects ranging from external investigations to support FRAEW, through to internal structural reviews. Their work has always been exemplary, with an efficient, safe, knowledgeable and reliable team to support our access requirements. The team have high standards in all aspects of work and present a professional image to support our works.
    Louis Kirchell
    Stantec
  • I started using Dunn in 2025 at Crest to assist our fire engineers for intrusive surveys and can confidently say they have been fantastic to work with from the offset. Professional, courteous, and efficient at all times. The team communicate extremely well and are always on the end of the phone should you need them. The work I have asked them to undertake can be sensitive with multiple outside parties involved and can only praise them for their professionalism throughout each stage.
    The services I have used with Dunn include:
    • Site attendance for external intrusive investigations and opening up.
    • Site attendance for internal intrusive investigations and opening up.
    • Traffic Management (where required)
    • Re-instating and decorating inspected areas.

    The team has assisted me on multiple occasions last minute and have in cases from initially being asked to attend site, to being on site has taken as little as 5 days. It is a testament to their professionalism as it is very difficult to find a company so flexible for these types of works.
    I shall continue to use Dunn moving forward without doubt.
    Nathan Mundy
    Crest Nicholson