Metal cladding is one of the most common exterior finishes on industrial and commercial buildings across the UK. Over time, exposure to weather, pollution and general wear takes its toll, leaving panels faded, chalked or corroded. Cladding painting and refurbishment offers a cost-effective way to restore and protect your building without the expense and disruption of full panel replacement. We cover how cladding deteriorates, the refurbishment process from inspection through to finishing, and why professional spraying and preparation are essential to achieving long-lasting results.
How Does Industrial Cladding Deteriorate?
Most profiled metal cladding (typically steel or aluminium) is coated during manufacture, giving it an expected lifespan of around 10 to 20 years before the finish begins to break down. Deterioration tends to follow a predictable pattern. It usually starts with gradual chalking or colour fading before progressing to coating failure. Once the decorative coating has broken down, corrosion begins to attack the protective zinc or aluminium alloy layer beneath. Left unchecked, this eventually leads to failure of the steel substrate itself, often through perforation or excessive thinning.
Environmental conditions play a significant role in how quickly this process occurs. Buildings in industrial areas face higher levels of airborne sulphur dioxide and pollution, while properties in coastal or marine environments are exposed to salt spray that can travel up to three kilometres inland. Both conditions accelerate corrosion and shorten the effective life of cladding coatings.
The key point for facility managers and property owners is that cladding can be successfully over-coated and restored at any stage up until the steel substrate itself has failed. Acting early extends the life of your cladding by many years and avoids the far greater cost of full replacement.
What Does the Cladding Refurbishment Process Involve?
A professional cladding refurbishment follows a structured process to ensure the new coating bonds properly and delivers lasting protection. Cutting corners at any stage risks premature failure, making experienced application essential.
Inspection and Assessment
Every cladding refurbishment begins with a thorough site inspection. This identifies the extent of damage across all elevations, since different faces of a building can deteriorate at different rates depending on their exposure to weather and sunlight.
A cross-hatch adhesion test should be carried out on each elevation to confirm that the existing coating still has adequate adhesion for over-coating. Where adhesion has failed, those areas will need to be stripped back to bare metal before new coatings are applied.
Surface Preparation
Proper preparation is the foundation of any successful cladding refurbishment. High-pressure water cleaning removes loose and flaking paint, salts, dirt, algae and other contaminants from the panel surfaces. Where oil contamination is present, specialist detergents combined with scrubbing and further pressure washing are needed to achieve a suitably clean surface. Rusted or damaged areas require mechanical preparation to expose clean, sound metal with minimal residual rust.
Sharp edges, welds, bolt heads and fixings all demand particular attention. These areas are vulnerable to coating breakdown and benefit from additional preparation, including grinding sharp edges to a smooth radius where possible, to help the paint system achieve adequate thickness.
Repairs and Priming
Dented, cracked or heavily corroded panels may need localised repairs using commercial fillers, or in more severe cases, replacement of individual sections. Once repairs are complete, joints and edges should be sealed to prevent future water ingress.
Priming is a critical step, particularly on galvanised steel or aluminium substrates. Modern primer-and-finish systems offer anti-corrosive properties in a single product, simplifying application while still delivering strong adhesion and protection. Care must be taken to achieve the correct dry film thickness across both the flat surfaces and the profiled edges of cladding panels, as thin spots on edges are a common point of early failure.
Spraying and Finishing
Spray application is the preferred method for cladding refurbishment. It delivers faster coverage, a more uniform finish and better film thickness control compared with brush or roller application on profiled metal surfaces. Airless spraying is particularly effective for large-scale industrial buildings, covering expansive areas efficiently while keeping project timescales short.
A full cladding respray not only restores the building’s appearance but also forms a protective barrier against UV degradation, moisture and corrosive atmospheric conditions. Where only partial repairs have been carried out, professional colour matching ensures the finished result looks seamless and consistent across the entire building.
Why Is Colour Matching Important?
Consistency of appearance matters, particularly for businesses where their premises reflect their brand. When cladding refurbishment involves partial repairs or panel replacements alongside over-coating, matching the new finish to the existing weathered surfaces requires expertise. Professional colour matching uses specialist equipment and works with paint suppliers to source or mix precise shades, factoring in the natural weathering of surrounding panels so the final result blends effectively.
Test patches applied before full spraying begins provide an opportunity to confirm visual accuracy and give property owners confidence in the outcome before work proceeds across the building.
When Should You Refurbish Rather Than Replace?
Refurbishment is the right choice for buildings where the steel substrate remains structurally sound. If cladding has only reached the chalking, fading or early corrosion stages, professional over-coating can extend its working life by up to 10 years or more at a fraction of the cost of full replacement. It also completes in significantly less time, reducing disruption to daily operations.
Replacement becomes necessary only when corrosion has perforated the steel or thinned it beyond the point where a protective coating can restore adequate performance.
Partnering with Halls Decorators
At Halls Decorators, we bring over 50 years of experience in industrial painting and protective coatings to cladding refurbishment projects across Yorkshire, Greater Manchester and Lancashire. Our specialist team handles every stage of the process, from initial inspection and surface preparation through to spray application and final finishing, using premium coatings designed for long-lasting performance in demanding environments.
We understand that industrial buildings need to stay operational, which is why we work to tight deadlines with flexible scheduling to keep disruption to an absolute minimum. Our CHAS accreditation and fully certified workforce (holding CSCS, IPAF, PASMA and SSSTS qualifications) means your project is delivered safely and to the highest professional standards.
Whether your cladding needs a complete respray or targeted repairs to damaged sections, our time-served decorators are happy to advise you on the most suitable approach for your building. Contact our team today for a free consultation and quote.