Commercial roof replacement contractors — London & the South East
Maguire Brothers is a specialist commercial roof replacement company and Principal Contractor, managing every project from initial survey through to completion across London and the South East of England.
WHY CHOOSE US
Why choose Maguire Brothers for your roof replacement
45+ years of experience
A family-run business established in 1979, we’ve delivered commercial roof replacements across every sector and building type in London and the South East – with the same values and commitment throughout.
Principal Contractor - end to end
We manage every project from survey through to handover. One contract, one point of accountability throughout.
Manufacturer-neutral advice
We’re not tied to any system or supplier. Our specification is led entirely by what’s right for your building.
Occupied buildings - kept operational
All our work is on existing occupied buildings. We have the experience and methodologies to keep your organisation running throughout – minimising disruption at every stage.













HOW WE WORK
Our approach to roof replacements
Every commercial roof replacement starts with a comprehensive survey and written condition report. We then develop a specification and programme around your building and your occupants, with clear communication throughout. As Principal Contractor we manage everything – from mobilisation to final sign-off.
Not sure whether repair or replacement is the right decision?
Our in-depth guide covers the key indicators, lifespan data across all roof types, and the whole-life cost argument for replacement versus ongoing repair.
CASE STUDIES
Recent commercial roof replacement projects
A selection of recent commercial roof replacement and refurbishment projects across London and the South East — from NHS hospitals and industrial facilities to heritage buildings and residential blocks. Projects range from £50,000 to £2 million+.
Whitehawk Bus Depot, Brighton
Derwent Way, Kent
Croydon University Hospital, Croydon
Barnes Methodist Church, Barnes
St Dunstan's College, Catford​
WHAT OUR CLIENTS SAY
"Maguire Brothers have always provided a very high standard of work and have been helpful and easy to work with. This is a very busy trust, operating 24 hours a day 7 days a week and Maguire Brothers worked right through the Covid-19 pandemic managing health and safety to a high standard. They have offered good value, always completing projects within budget."
Head of Estates, NHS Trust


























IS REPLACEMENT RIGHT FOR YOU?​
When is commercial roof replacement the right decision?
The right answer depends on your roof type, its age and the nature of the problems. These are the key indicators we look for:
- Recurring leaks despite previous repairs
- The roof is approaching or past its expected lifespan for its system type
- Repair costs are escalating and becoming uneconomical
- Widespread deterioration across the roof surface – not just isolated areas
- Structural issues – sagging, damaged decking or rotten timbers
- Declining energy performance, indicating insulation degradation
If you’re unsure which of these applies to your building, the right first step is an independent roof survey. We can help with that.
Frequently Asked Questions
Can you provide pre-tender advice and specification support?
Yes. We are regularly involved at pre-tender stage, working alongside building surveyors and consultants to advise on specification, system selection and budget cost before a project goes to tender. Our advice at this stage is always manufacturer-neutral – we recommend what is right for the building, not what suits a particular product range.
What is your roof replacement process?
Our process begins with a comprehensive roof survey and condition report to assess the current state of your roof. We then provide detailed specifications and a buildability assessment, ensuring that the project is feasible and tailored to your building’s needs.
We outline a full project timeline that minimises any operational disruption, and our certified technicians handle the installation with precision. Throughout the process, we conduct quality assurance inspections and provide final sign-off once the job is complete.
Speak to a member of the team to discuss your project.Â
What sectors do you specialise in for commercial roof replacement?
Successfully delivering roof replacement projects across diverse sectors has been central to our ongoing growth, with specialist experience in healthcare, education, industrial, and heritage buildings.
To cope with the considerable demands of different working environments, we have refined our methodologies to handle the unique challenges of each sector, whether that’s coordinating works around academic terms, maintaining clean room conditions, or preserving historic features in listed buildings.
What certifications and memberships does your company hold?
At Maguire Brothers, we are committed to maintaining the highest standards in commercial roofing. Our dedication to excellence and safety is reflected in our industry-leading certifications and memberships, including:
- National Federation of Roofing Contractors (NFRC)
- Constructionline Gold
- Institute of Roofing
- Contractor Health and Safety Scheme (Accredited Contractor)
- SafeContractor Approved
- Liquid Roofing and Waterproofing Association
- Safe2Torch
- SSIP (Certified)
- LHC Member
- NFRC Competent Person Scheme
- Trustmark Endorsed
These credentials demonstrate our adherence to the best practices in roofing, safety, and quality, ensuring that we consistently deliver reliable and safe roofing solutions for our clients.
How long does a roof replacement typically take?
The timeline for a project depends on the size and complexity of the roof. As a trusted commercial roof replacement company, we offer a detailed breakdown of the schedule during consultations, ensure transparent communication throughout the process, and employ strategies to minimise disruption to your business operations. This comprehensive approach guarantees client satisfaction at every stage.
Do you have experience working on heritage or listed buildings?
Yes, Maguire Brothers has extensive experience working on heritage and listed building roofing contracts, ensuring that every project is carried out with the utmost care to preserve the architectural integrity of these historic structures. For example, our restoration of the roof at St. Andrew’s Church in Ham demonstrated our ability to manage intricate details and specialised requirements, earning recognition and an award nomination. We collaborate with conservation experts to ensure compliance with regulations and deliver long-lasting, sympathetic solutions.
Do you offer sustainable or eco-friendly roofing solutions?
Absolutely. At Maguire Brothers, we are committed to providing eco-friendly and sustainable roofing solutions. We have extensive experience integrating solar slates and tiles, helping clients sensitively achieve their sustainability goals. We are able to source environmentally friendly materials, add high-performance insulation systems to improve energy efficiency and incorporate recyclable products wherever possible. Additionally, we adopt eco conscious best practices in waste management and offer solutions like green roofs to enhance sustainability.
Can you provide references or case studies from similar projects?
Yes, we have a range of case studies and references showcasing our expertise across various sectors. These include projects for a wide rannge of listed and heritage buidlings, churches, schools and more. You can view all our case studies here. If you have a large-scale roofing project, contact us to talk through your requirements.
How much does a roof replacement cost?
The cost of an entire roof replacement can vary depending on factors such as the size of the roof, the materials selected, and the complexity of the project. Maguire Brothers provides bespoke quotations tailored to the specific needs of each client. We recommend scheduling a consultation with our team to conduct a thorough roof survey and provide an accurate, transparent estimate for your project.
Talk to our team about your roof replacement project
Monday to Friday, 8am–5:30pm
info@maguirebrothers.co.uk
Whether you’re at early assessment stage or ready to go to tender, we’re happy to discuss your project with no obligation. We can carry out a roof survey, help with specification, or simply answer technical questions before you commit to anything.
FURTHER READING
Helpful guides for building owners and surveyors

Flat Roof Replacement: Systems, Costs and What to Expect
Planning a commercial flat roof replacement? This guide covers the systems available, what the process involves, building regulations requirements and how to choose the right contractor.

