Fire safety is one of those areas where getting it wrong is not an option. It is also one of the most complex and heavily regulated parts of the built environment. Isoler Limited, part of the Northern Bear group, has spent over 30 years becoming one of the UK’s most trusted names in building integrity, fire safety, and compliance. Here is a closer look at who they are and what they do.
Who Are Isoler Limited?
Isoler works across the UK, covering fire safety, remediation, and specialist construction works for clients in the public sector and construction industry. They are not a business that does one thing and refers everything else out. Consultancy, compliance, and physical delivery all sit under one roof, which means clients deal with one team from the initial survey through to final certification.
The work is technical. The stakes are high. And Isoler has been doing it for over 30 years. By bringing consultancy, compliance, and delivery together under one roof, Isoler removes the complexity that comes from managing multiple contractors across a single project.
Over 30 years in, that approach has earned them a reputation that extends across the UK.
What Isoler Does
Isoler’s services span the full building integrity lifecycle, from initial survey and compliance advice through to physical delivery and project sign-off. Their offering covers eight specialist areas.
- Fire Stopping and Compartmentation — Ensuring compartmentation remains intact to limit the spread of fire through a building is one of the most critical elements of fire safety design. Isoler specialises in delivering and installing fire stopping systems that are not only effective but highly effective, addressing fire migration through gaps in structural walls. All work is carried out in line with the Safety Regulations 2023 and is independently assured through third-party warranty.
- Fire Door Installation and Maintenance — Fire doors only work if they are installed correctly and kept in good condition. Isoler does both. Every installation is tailored to the specific environment, whether that is a construction site or a social housing block, and the whole process is backed by BM Trada accreditation. On the maintenance side, no two doors get the same treatment. The team assesses each one individually, repairs where possible, and replaces where it is not.
- Intumescent Paint and Structural Board Protection — When a fire takes hold, intumescent coatings do something remarkable. The heat triggers a chemical reaction that causes the coating to expand into a dense char layer, effectively insulating the steel beneath it. Without that protection, structural steel can fail fast. Isoler applies intumescent paint and board protection to structural columns, beams, and surfaces including masonry and timber, cutting the risk of fire spread and keeping buildings standing when it matters most.
- Fire Dampers — Most people in a building have no idea fire dampers exist. That is fine, until they fail. These components sit inside ventilation systems and are designed to stop fire and smoke travelling through ductwork from one area to another. Isoler installs, tests, and maintains them. Annual testing is a legal requirement, and Isoler makes sure clients do not fall short of it.
- Passive Fire Stopping and Compartmentation Surveys — Before any remediation work begins, you need to know what you are dealing with. Isoler's compliance team carries out specialist surveys and assessments, working through the project lifecycle to identify risks, clarify obligations, and turn findings into practical action plans. No jargon, no vague reports. Just clear advice on what needs to happen next.
- Compliance Professional Services — Isoler's professional services team sits alongside clients and delivery teams throughout a project, providing independent oversight and keeping everything on track from a compliance perspective. Their services cover Project Management, Fire Risk Assessment, Principal Designer under both CDM 2015 and BSA 2022, Certified Clerk of Works, and General Construction Health and Safety Advice.
- External Works and Wall Remediation — Where external wall systems present safety or compliance issues, Isoler provides specialist remediation services across residential, commercial, and public sector buildings. Their services cover facade remediation, cladding replacement, fire safety improvements, and associated building envelope works, managed through the full process from assessment to certification.
- Principal Contractor — Isoler also operates as principal contractor on a range of projects throughout the UK, orchestrating and overseeing all activities across a project, managing subcontractors, and ensuring welfare facilities and compliance obligations are maintained from start to finish.
Training and Development
Beyond delivery, Isoler operates the Isoler Fire Integrity Training Facility, an ASFP-accredited training provider delivering practical, industry-focused training across passive fire protection disciplines. Courses cover passive fire stopping, fire doors, fire dampers, compartmentation, building safety compliance, competency development, and practical installation training. Training can be tailored to specific organisational needs, making it a valuable resource for clients looking to build capability within their own teams.
A Different Kind of Business Within the Group
Isoler brings something genuinely distinct to the Northern Bear group. Where many of our businesses operate in construction, roofing, and materials handling, Isoler’s specialism sits squarely in building safety and compliance. In a post-Grenfell landscape where building safety legislation continues to evolve and scrutiny on fire protection has never been higher, having a business of Isoler’s calibre within the group matters.
Their client base includes housing associations, NHS trusts, hospitality groups, and public sector bodies. Their projects range from fire damper installation at Hampton by Hilton hotels to compartmentation works across NHS hospital sites and fire protection upgrades in high-rise tower blocks for Your Homes Newcastle.
To find out more about Isoler and their full range of services, visit isoler.co.uk.
To learn more about Northern Bear and the wider group, visit our about us page, explore the ten businesses within the Northern Bear group, or get in touch with the team today.
