Commercial Flat Roof Leaking? Here’s What To Do…
A leak in a commercial flat roof can bring business to a halt. Water spreads quickly through insulation and ceiling
For facilities managers, estates teams and property directors across London, the Midlands, the South East and South West.
When your commercial flat roof develops a problem, the consequences can be immediate and serious. Disrupted operations. Damage to stock, equipment or interiors. Compliance questions that need urgent answers.
You need a specialist who can assess the situation accurately, give you straight-talking advice, and get the right solution in place without delay. That is exactly what we do.
At Proactive Flat Roofing, we specialise in commercial flat roof repair and replacement across all property types. Schools, NHS facilities, apartment blocks, industrial buildings, hotels, and public-sector estates. With over 23 years of combined experience, a Best Customer Service Finalist 2023 award and a dedicated commercial team, we deliver reliable, fully compliant systems built to last.
Whether your roof needs an urgent repair, a full replacement or a planned refurbishment programme, we start with an honest assessment rather than a sales pitch. You get a clear picture of what is happening, what your options are and what each one will cost. Then the decision is yours.
We will tell you whether repair, overlay or full replacement is genuinely the right option for your building. If a repair can extend the life of your roof by several years and save you significant cost, we will say so. Our free survey process is designed to give you the information you need to make the right decision, not to generate the largest possible job. You can also get a rough cost indication online before committing to anything.
All our systems meet current building regulations covering insulation performance, drainage, fire safety and U-value standards. We hold CHAS accreditation, are NFRC and CORC members, and are authorised contractors for both Sika Sarnafil and Triflex. For public sector buildings and commercial landlords, this means your roofing work comes with the independent verification your procurement team needs. If the source of a problem is unclear, we also offer electronic leak testing to pinpoint faults accurately before any work begins.
Upgrading to a modern warm roof system significantly reduces heat loss, improves internal comfort for occupants and lowers energy bills. For public buildings, schools and healthcare facilities, this can make a meaningful difference to operating costs.
A well-specified roof replacement protects the entire building fabric beneath it. Left unaddressed, water ingress causes progressive damage to insulation, structural decks, ceilings and services, all of which cost significantly more to remediate than a timely roof replacement. Getting the right solution in place now removes that risk from your maintenance schedule for good.
All repairs and replacements are backed by project-specific warranties and delivered by our own specialist commercial team. You get a named project manager, quality control at every stage and full handover documentation on completion. Not sure why a specialist matters? Read why a specialist flat roofer makes a difference.
Before we quote for any work, we carry out a full site inspection and provide a written condition report with photos, findings and clear, costed recommendations, completely free of charge.
For commercial clients, this report does more than describe the problem. It gives you the documentation you need to brief stakeholders, support a budget request or begin a procurement process. Everything is written in plain English, itemised clearly and presented in a format you can share internally without further work.
Included in your report:
Guest-facing buildings require a contractor who understands the importance of programme certainty, low disruption and a professional finish. Our work for Novotel Hotels demonstrates our ability to deliver to the standards expected in the hospitality sector.
Healthcare sites require careful planning around infection control, patient access and clinical operations. We are experienced working within NHS and private healthcare environments and understand the documentation and compliance requirements that come with them.
We plan all works around term dates and access requirements. Our accreditations, including CHAS and TrustMark, meet the vetting requirements of most local authority and multi-academy trust procurement processes. We are also fully across Gateway 2 compliance requirements for higher risk buildings, which is increasingly relevant for educational estates teams.
We work with managing agents, freeholders and property directors on flat roof repairs and replacements across apartment blocks and residential developments. We can advise on leaseholder communication, phased works and the fire safety and compliance requirements that apply to higher risk buildings under current building safety regulations.
We have worked directly with local authorities and public sector organisations including West Midlands Combined Authority and Cotswold District Council. We understand procurement requirements, reporting expectations and the importance of value for money decisions in a public sector context.
Large span commercial roofs require materials and systems with proven long-term performance. We specify and install single-ply systems across industrial and warehousing buildings, with a focus on minimising operational disruption. For buildings that do not yet require full replacement, our commercial roof coating systems can extend serviceable life significantly.
Project: New build, multiple roofs and terrace area
Size: 325m² over 5 roof areas
Location: Worcester, Worcestershire
After their original contractor became unresponsive, the client faced design issues, budget overruns and safety concerns. With heavy rainfall forecast and the risk of further roof damage looming, they contacted Proactive Flat Roofing in crisis.
Proactive mobilised within a week, offering redesigned solutions that met the required U-values, ensured compliant drainage and significantly reduced costs. The project was completed on time, within budget and exceeded all expectations.
“Insert client quote from the Mill House project. One to two sentences on the outcome, the quality of work or the experience of working with Proactive.”
[Client name and role, Mill House Care Home Extension]
Read the full case study: Mill House Care Home Extension
Whether your roof needs urgent attention or you are planning ahead for next year, our survey gives you the information you need to move forward with confidence. There is no obligation and no sales pressure. Just a clear, written assessment from a specialist who understands commercial buildings.
You will receive a full condition report, photographs of all findings, your options set out clearly and a fully costed action plan. If you are not quite ready for a survey yet, you can get a rough cost indication online or download our free flat roofing guide to read up before you call.
Monday to Sunday
09:00 to 17:00
A leak in a commercial flat roof can bring business to a halt. Water spreads quickly through insulation and ceiling
Looking for someone to be there for your commercial flat roof repairs? A company you can trust to do an
If only they’d known… Every week, we meet property owners, facilities managers, and school estates teams who thought a flat