Flat Roof Refurbishment

Flat Roof Refurbishment for Factories

Factory buildings across the UK rely on flat roof structures that take a battering from the elements year after year. Storm Coatings specialise in flat roof refurbishment for factories of all sizes, from small manufacturing units to large-scale production facilities. Our liquid overlay systems can be applied to existing felt, asphalt, concrete, or metal flat roofs without the need for costly strip-and-replace work. This means your factory can continue operating during the refurbishment with minimal disruption to production.

Flat Roof Refurbishment for Warehouses

Warehouses are particularly vulnerable to flat roof failures due to their large roof spans and the critical need to keep stored goods dry. A leaking warehouse roof can lead to stock damage, health and safety risks, and business interruption. Our flat roof refurbishment service for warehouses uses seamless liquid waterproofing that eliminates the joints and laps where most leaks originate. We have refurbished warehouse flat roofs across East Anglia, the Midlands, and nationwide, with systems guaranteed for up to 25 years.

Flat Roof Waterproofing Coating Systems

Our flat roof coating systems are suitable for all common flat roof substrates including felt, single-ply membrane, asphalt, concrete decks, and metal. The liquid waterproofing is applied cold, cures to form a seamless rubber-like membrane, and can accommodate building movement and thermal expansion without cracking. All our flat roof refurbishment work includes a detailed survey, specification, and written guarantee.

Frequently Asked Questions

Can a flat roof be repaired without replacing it?

Yes — liquid waterproofing can be applied directly over the existing flat roof surface, creating a new seamless membrane without the need to strip the old covering. This is faster, cleaner, and significantly cheaper than full replacement.

What causes flat roofs to fail?

Common causes include UV degradation of the waterproof membrane, ponding water, thermal movement causing splits at joints, poor original installation, and lack of maintenance. All of these can be addressed through refurbishment.

How long does flat roof refurbishment last?

Our liquid waterproofing systems for flat roofs are guaranteed for up to 25 years. The seamless application eliminates the joints and seams that are the most common failure points on flat roofs.

Is a flat roof refurbishment as good as a new roof?

A properly applied liquid waterproofing refurbishment provides equivalent or better waterproof performance compared to a new built-up or single-ply roof system, at a fraction of the cost.

Can you fix ponding water on a flat roof?

Yes — we can improve drainage by installing additional outlets, creating falls using tapered insulation or screed, and ensuring all outlets and gutters are clear and functional.

A flat roof on a commercial building rarely fails all at once. More often it’s a slow deterioration — blistering felt, standing water, failing laps, corroded outlets — until one wet winter makes the problem impossible to ignore. If you’re a facilities manager, building owner or main contractor trying to decide whether to repair, coat or replace, the answer depends on what’s actually happening at substrate level. This page explains how we assess commercial flat roofs, what systems we use, and how we work with clients across sectors where downtime and budget control both matter.

Commercial Flat Roof Challenges and Why They Fail

Most flat roof failures follow familiar patterns. Felt systems degrade at the laps and around upstands. Single-ply membranes develop pinhole splits or lifting at seams. Built-up roofing loses its surface dressing and starts to absorb UV damage. Ponding water — often caused by blocked or undersized outlets — accelerates every one of these problems.

On commercial and industrial buildings, the consequences compound. A leak that would be a nuisance in a small property can shut down a production line, damage stock, or compromise electrical installations. In public buildings like schools or leisure centres, it creates health and safety obligations and can trigger emergency closures.

Early assessment is the key. In many cases where an owner assumes they need a full roof replacement, a properly specified flat roof coating or liquid waterproofing system is the right answer — and a fraction of the cost.

Flat Roof Coating vs Membrane Replacement

Replacing a flat roof membrane is disruptive, expensive and often unnecessary. If the existing substrate is structurally sound and the insulation is dry, a liquid-applied waterproofing system applied over the existing surface can extend the roof’s life significantly without the mess and cost of a strip-out.

Commercial flat roof waterproofing in the UK increasingly uses cold-applied liquid systems for refurbishment work precisely because they’re seamless, can detail around complex upstands and penetrations, and don’t require the plant and hot-works permitting that torch-on systems do. For a facilities manager managing a live site, that matters.

Where a substrate is compromised — waterlogged insulation, structural deck damage, or a failed warm roof buildup — a more involved refurbishment or partial replacement may be unavoidable. We’ll tell you that upfront, and we won’t coat over a substrate that’s going to fail behind the system.

Systems We Use: Liquid Applied, Single-Ply and More

We work with several proven systems depending on the roof type, condition and specification requirements. For liquid-applied waterproofing, we use systems suited to the substrate — whether that’s concrete, timber deck, metal, or an existing membrane. Where a single-ply membrane is in place, coating or refurbishment rather than replacement is often viable, depending on the membrane type and condition.

For flat roof refurbishment on commercial property, we’ve worked with TOR and similar specification-grade systems where architects or surveyors require a named product and associated documentation. If you’re working from a specification written by a consultant, we can confirm compatibility and price accordingly.

Where a warm roof installation is part of the scope — whether as part of a new section or a full-spec refurbishment — we can quote that alongside the waterproofing layer, treating it as a single package rather than splitting the work between trades.

Rooflights, Skylights and Penetrations: How We Handle Them

Rooflights, skylights, soil pipe penetrations and mechanical service upstands are where a significant proportion of flat roof leaks originate. The membrane around them degrades faster, detailing is harder, and bodged repairs tend to fail quickly.

We treat these as part of any flat roof refurbishment scope, not as extras to avoid. Rooflight kerb flashings can be properly detailed into a liquid system. Where a rooflight unit itself is degraded — yellowed, cracked or no longer thermally adequate — we can advise on replacement or surface treatment options depending on the material.

Enquiries we receive sometimes ask specifically about single-ply membrane coating where rooflights are involved. The answer depends on what system is in place and how the existing detailing sits. A site visit is almost always necessary to give a reliable answer — a desktop quote on this kind of work isn’t worth much to either party.

Temporary Fixes vs Permanent Waterproofing Solutions

We occasionally receive enquiries asking whether a temporary fix can be applied, typically to manage an active leak while a longer-term decision is made. The short answer is yes, in some cases — a targeted application of a compatible sealant or patch system can stabilise a specific leak point.

But temporary work has limits. It doesn’t address underlying membrane degradation, it may complicate later permanent work if the wrong materials are used, and it can create a false sense of security that delays proper treatment until the roof is in worse condition.

For a commercial flat roof where the decision on permanent waterproofing hasn’t been made yet, the more useful first step is usually a proper survey rather than an emergency patch. It gives you a clear picture of the actual condition, identifies which areas are critical, and lets you make a budget decision based on real information rather than guesswork. A flat roof refurbishment quote based on a proper survey is a document you can put to a board or a budget committee — a patch job isn’t.

Schools, Leisure Centres and Public Buildings: Our Experience

A meaningful proportion of the flat roof enquiries we receive come from public sector buildings — schools, sports centres, local authority properties and similar. The procurement process is often different: specifications written by architects or surveyors, tender returns required in a particular format, CDM considerations to address, and a strong preference for systems with documented performance histories.

We’re used to working in this environment. If you’re a school business manager or a local authority property team dealing with a leaking flat roof, we can work from an existing specification or survey, or we can carry out our own assessment and produce documentation suitable for your internal approval process.

We can visit schools and similar occupied buildings with appropriate site management, work around term times where scheduling allows, and provide the kind of paper trail that public sector clients typically need. If you’re managing a tender or need to get three quotes, we’re set up for that process.

Get a Flat Roof Assessment

If you’re trying to work out what’s actually wrong with a flat roof, or whether coating it is viable against replacing it, the starting point is a survey. We visit the site, assess the substrate condition, check the detailing around upstands and penetrations, and give you a clear written picture of what’s there.

From that we can produce a specification and quote — whether that’s for a targeted liquid waterproofing repair, a full flat roof refurbishment, or a warm roof installation as part of a broader scope. If you’re working with an architect or surveyor already, we can liaise directly with them.

To arrange a site visit or discuss a specification, contact us through the website or call directly. [confirm with James: typical lead time for survey booking and quote turnaround.]