Curtain Walling Gaskets, Mullions & Sealant Maintenance
Over time, gaskets shrink, mullions become loose, glazing cracks, units blow, spandrel panels weaken, and sealants fail. With a targeted approach and an integrated planned preventative maintenance (PPM) plan, risks of gasket failure and curtain walling defects can be minimised.
We support commercial building owners and asset managers with a range of maintenance services for curtain walling systems and bespoke façade assemblies.
Our aim is to keep building safe, watertight, functional and secure on all areas of the building fabric, accessed by ropes, cradles, mast climbers or MEWPS.
Our works cover curtain walling maintenance on all sections, gasket removal, design and reinstatement of new glazing units, mastic removal and sealant replacement to help protect and mitigate corrosion build-up and water ingress.
Proactive Façade Curtain Walling Maintenance
To ensure your façade, curtain walling or cladding system is performing, watertight and stable, a proactive façade maintenance plan is a sound strategic investment. Often delivered with a rotating 33% per year delivery programme, this ensures the entire building envelope is surveyed every three years.
Crucial façade safety, defects and locations of risks can be built, helping building managers and owners to effectively manage the curtain walling, cladding and glazing system.
We specialise in façade curtain walling maintenance:
- Curtain wall inspections: PPM surveys, defect mapping by abseiling and cradles, we work with building managers and surveyors to capture, monitor and maintain.
- Gasket, mullion, sealant repairs and specification support: Our aim is to support at each stage of the project, creating bespoke solutions to fit each building façade maintenance plan.
- Curtain wall replacement and installation of localised systems: Where risks and defect remain present, we can replace curtain walling, gaskets or mullions throughout the façade.
Curtain Walling Defects & Remedials Repairs
Commercial curtain walling systems on tall, modern, and high-rise buildings are fully exposed to extreme weather conditions, including wind, rain, UV exposure, and fluctuating temperatures. Over time, constant exposure to the elements, combined with natural building movement and thermal expansion, places sustained pressure on fixings, sealants, and façade components.
As a result, a range of issues can develop. These vary depending on the building’s height, age, and level of exposure, but commonly include:
- water ingress and leaks (which are often difficult to trace),
- defective or loose gaskets that may require bespoke manufacturing to retrofit replacement systems,
- cracked glazing caused by excessive movement,
- damaged or corroded fixings,
- poorly performing spandrel panels.
As buildings age, aluminium curtain walling systems can gradually deteriorate, making regular inspection and planned maintenance essential to ensure continued safety, performance, and compliance.
Our detailed gasket, mullion and sealant condition surveys deliver far more than a superficial inspection. They provide:
A complete overview and health check of your building façade and curtain walling
We’ll examine your façade, glazing units, exposed joints, specialist fixings stability. With notice, we can remove panels and expose the internal structure, helping to identify hidden defects, early-stage weathering, thermal movement issues and corrosion.
Digital defect mapping and real-time reporting for curtain walling surveys
Using advanced defect mapping software, we can translate inspection findings into precise digital maps. This visual data not only pinpoints the location and severity of each defect but also becomes a powerful tool for planning, budgeting, and communicating repair needs with stakeholders.
Red, Amber & Green, we help you understand and prioritise action with budgets
Not all curtain walling and cladding defects demand immediate intervention, whilst some pose a significant risk. Our surveys categorise issues into Red-Amber-Green (RAG) ratings to help you allocate maintenance resources where they’ll have the greatest impact. Red risks are reported instantly with a repair and budget solution to support with corrective and fast next stage action.
Curtain walling, gasket, mullion, sealant and glazing unit maintenance roadmaps
Our curtain walling inspections aren’t just data-gathering exercises. They transform raw findings into practical, evidence-backed strategies. We help you move from reactive maintenance to proactive protection, extending your building’s lifespan and avoiding costly surprises.
Whether you manage a modern building with glazed curtain walling, a historic stone façade, or complex mixed-material elevations, our façade condition surveys are adaptable to all building façade types, specialist access and performance requirements.
Integrated Façade Access Solutions: Industrial Rope Access, Cradles & MEWPS
Maintaining façades on tall or architecturally complex buildings requires specialist access and technical expertise. Critical components—such as curtain wall junctions, glazing interfaces and high-level gasket systems—are often difficult to reach using conventional methods, making safe inspection and repair challenging without the right approach.
At Building Transformation, we utilise a range of specialist access solutions to support façade inspection, maintenance and repair, selecting the most appropriate method based on the structure, scope of works and operational constraints. These include rope access for precise high-level interventions, mechanical access platforms for larger work areas, and temporary access structures where longer-duration activities require stable working platforms.
This flexible access capability allows us to maintain façades safely and efficiently, helping clients protect the performance, compliance and visual integrity of their buildings regardless of height or architectural complexity.
Book a Facade Condition Survey