Commercial Roofing Contractors
NWIR is one of the UK’s only specialist commercial and industrial contractors in the UK. With more than 100 years of combined experience, award-winning accreditation and manufacturer guarantees of up to 25 years.
Industrial & Commercial Roofing Contractors For The Whole Of The UK
NWIR carries out commercial and industrial roofing projects across the UK. Our team is based in Warrington but operates nationwide, with no additional charge for travel to most major UK locations.
- Commercial Roofing Contractors Liverpool
- Commercial Roofing Contractors Manchester
- Commercial Roofing Contractors Leeds
- Commercial Roofing Contractors Birmingham
Plus, guarantees between 10 and 25 years are available depending on the project requirements. Speak to our team to find out whether your project would be eligible.
Why Choose NWIR As Your Commercial Roofing Contractor?
Choosing NWIR as your commercial roofing contractor is an easy decision to make once you have a look at our list of accreditations and awards. You can trust us to complete your commercial roofing project to the highest standard.
We provide a dedicated, bespoke service for industrial and commercial buildings, carrying out a wide range of projects, including everything from large-scale commercial roof replacement to fixing leaking roofs and blocked gutters. We provide our services to customers throughout the UK, so wherever you’re based, we’ll be on hand to offer our expertise.
Commercial and Industrial Roofing Services
Whatever your roof needs, NWIR covers every stage of a commercial and industrial roofing project, from the initial surveys through to installation, maintenance and long-term protection.
Roofing Systems
- Flat Roofing Repairs
Cost effective repairs for flat roofs on commercial properties of all sizes.
- Felt Roofing Systems
Durable, multi-layer felt roofing for long-term protection on commercial and industrial buildings.
- Single Ply Membranes
Lightweight, high-performance single ply membranes suited to large commercial roof areas.
- Liquid Applied Roofing
Seamless, fully bonded liquid roofing solutions for complex or irregular roof shapes.
- Metal Roofing
Profiled metal roofing systems for warehouses, factories and industrial buildings. Our warehouse roofing is designed to cope with the large roof spans and heavier plant loads typical of these buildings.
Cladding Solutions
- Roof Cladding
New and replacement roof cladding for commercial and industrial properties.
- Wall Cladding
External wall cladding solutions that protect and improve your building envelope.
- Metal Cladding
Strong, weatherproof metal cladding systems for industrial and commercial buildings.
- Asbestos Overcladding
Asbestos overcladding is a cost-effective alternative to asbestos removal. We install a new layer over your existing roof, removing the risk without the disruption of a full removal.
- Cladding Coatings
Extend the life of existing cladding with specialist coatings that restore weatherproofing and appearance.
Maintenance & Specialist Services
- Nationwide Roof Maintenance
Planned roof maintenance programmes and urgent repairs for commercial and industrial clients across the UK.
- Cut Edge Corrosion Treatment
Specialist treatment for profiled metal roofs affected by cut edge corrosion, extending your roof’s life without replacement.
Relined and refurbished gutter systems to prevent leaks and water ingress.
- Safety Lines
Permanent fall protection systems installed by our specialist team on large commercial and industrial roofs.
- Green Roof Installation
Environmentally friendly roofing solutions, including green roofs and solar panel installation.
Sectors We Work In
Every building type presents different access challenges, structural requirements and planning considerations. NWIR’s industrial and commercial roofing contractors have worked across a wide range of sectors and understand what each demands.
As experienced retail roofing contractors, we understand the tight access and trading-hours constraints that come with shop and shopping centre roofs.
Roof Surveys Before Every Project
How Our Projects Work
From your first call through to the final handover, you always know where your project is up to.
- Enquire: Contact us by phone, email or use our online enquiry form. Tell us your building type, location and the problem you need help with.
- Site Survey: We’ll carry out a roof survey using the most appropriate method for your building and access. You’ll receive a written condition report.
- Itemised Quote: You’ll get a fully itemised quote so you know exactly what labour, access and materials you’re paying for.
- Project Planning: We agree a schedule with you that minimises disruption to your daily work and fits with your building regulation requirements.
- Installation: Our team completes the work using manufacturer-approved materials. You get full reports regularly. All our team is directly employed.
- Handover and Guarantee: On completion, you get your guarantee documentation, warranty paperwork and the relevant compliance certification.
When to book a roof moisture scan
Most clients come to us at one of four points, when the cost of guessing what is wrong with the roof starts to outweigh the cost of finding out.
- A leak keeps coming back after repair. The scan shows how far the water has travelled, so the next repair deals with all of the wet area rather than just the visible one.
- Your roof is due for refurbishment. Knowing which areas are wet tells you whether parts of the existing roof can stay in place or need to be stripped.
- You are setting maintenance budgets. Evidence of the roof’s condition lets you plan spending instead of reacting to the next leak.
- You are buying, selling or leasing a building. A scan gives you the roof’s real condition before you agree on a price or sign a lease.
From scan to targeted repair
Because we are both a roof surveying company and a roofing contractor, the quote that follows your survey is a full project costing, including the access and health and safety requirements of the job. When only part of your roof is wet, the work can be limited to those areas through flat roofing repairs rather than a full replacement.
Materials are installed by manufacturer-approved operatives, and new roofing can carry a single point guarantee of between 10 and 25 years, depending on the project.
Accredited roof surveyors and contractors
We are members of the National Federation of Roofing Contractors (NFRC) and accredited under CHAS and Constructionline. You can see the full list on our awards and accreditations page.
Other roof surveys and diagnostics
A moisture scan tells you where your roof is wet, but it is not always the best tool for finding where water gets in. Electronic leak detection locates leaks in most types of waterproofing membrane, while a commercial roof survey assesses the overall condition of your roof. You can see every method we offer on our roof surveys and diagnostics page.
Book a free roof survey
If you suspect water is trapped in your roof, finding out how far it has spread is the first step towards fixing only what needs fixing. Book your free site survey, and we will recommend the right scan for your building.
Call us on 0800 046 1500, Monday to Friday, 9am to 5pm.







Roof moisture scan FAQs
Get a Commercial Roof Survey
Getting a site survey doesn’t commit you to anything. With a single visit we’ll give you a written condition report, a clear picture of what your roof needs and an itemised quote for the work we recommend.
Our trusted roofing contractors cover the whole of the UK, so wherever you’re located, we can help.