Ageing curtain walling can create more than a visual problem. Older glazed units, failed seals, inconsistent reflective film and poor thermal performance can all affect how a building looks, feels and performs.

For landlords, asset managers and commercial property teams, the challenge is often to improve the building without defaulting to a full curtain wall replacement. In the right circumstances, specialist reglazing can provide a lower-disruption and commercially sensible alternative.

The problem with ageing commercial glazing

Older glazed façades can contribute to overheating in summer, heat loss in winter, poor internal comfort and inconsistent external appearance.

Where reflective film has been applied over time, the façade can begin to look patchy and dated. Internally, old or filmed units can also make working areas feel darker and less pleasant.

Why reflective film is not always a long-term answer

Reflective solar-control film may offer some short-term solar-control benefit, but it does not resolve every issue. It can create an inconsistent appearance, may not improve winter heat loss and does not fix ageing or failed insulated glass units.

For a commercial office building, façade appearance and tenant experience both matter. A tired or inconsistent glazed façade can affect first impressions and the perceived standard of the asset.

Why existing curtain walling needs a specialist approach

Commercial reglazing is not simply a matter of swapping glass. Existing curtain walling systems can create technical constraints around cavity size, retaining caps, gaskets, access and compatibility.

At the ABC Building, White Rose Park, the existing MAG Presslock curtain walling system required the replacement specification to work within a restricted 12mm cavity. Dortech developed a solution that allowed the existing façade system to be retained.

Real project example: ABC Building, White Rose Park

Dortech Maintenance is helping Munroe K upgrade the ABC Building at White Rose Park through specialist replacement glazing, retaining the existing curtain walling system while improving aesthetics, internal comfort and energy performance.

The project was not simply about replacing broken glass. It was about improving the long-term performance and appearance of the building while retaining the existing system wherever possible.

How replacement glazing improved performance

The new glass units have a light transmission of 34.6%, a g-value of 26.6% and a centre-pane U-value of 1.3 W/m²K.

The reduction in g-value represents approximately 58% less solar energy transmission through the glass compared with the original clear units. This supports reduced solar gain in warmer months, while the improved U-value supports better winter insulation.

Why the internal experience matters

One of the strongest benefits of reglazing is the improvement experienced from inside the building. Replacing old, inconsistent and filmed units can improve daylight quality, views out, comfort and the perceived standard of the workplace.

For office environments, this matters because excessive heat, glare, cold perimeter zones and poor visual clarity can all affect occupant comfort, productivity and tenant satisfaction.

When should building owners consider specialist reglazing?

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