Commercial Glass Replacement: Improve Comfort, Appearance & Energy Performance
Improve appearance
Replace tired, failed, misted or inconsistent glazing with a cleaner façade.
Improve comfort
Help reduce cold spots, overheating and glare through better glass selection.
Reduce demand
Support lower heating and cooling demand with upgraded commercial glazing.
Why old glazing can hold a building back
Older glazing can cause more problems than many building owners realise. A failed glass unit can affect safety, security and weather protection, but even glass that looks intact may no longer be performing well by modern standards.
In winter, poor-performing glazing allows heat to escape more quickly. This can make rooms feel colder and place more demand on heating systems. In summer, glass with weak solar-control performance can allow too much heat from the sun into the building, contributing to overheating, glare and higher cooling demand.
For commercial buildings with large areas of glass, this can have a real impact on comfort, appearance and operating costs.
Introducing Dortech Maintenance’s new Glass Energy Saving Calculator
To help customers make better-informed decisions, Dortech Maintenance has launched a new Commercial Glazing Energy-Saving Calculator.
The calculator has been created for building owners, landlords, facilities managers, consultants and project teams who want to understand the potential impact of upgrading their glazing.
It is designed as an early-stage modelling tool. It allows users to input project information and explore how different glazing specifications could influence potential energy savings.
Review existing glass
Consider how your current glazing is performing.
Compare upgrades
Model a higher-performing glass specification.
Explore potential savings
Review indicative energy-saving potential.
How the calculator works in plain English
The calculator looks at the relationship between old glass and new glass. It considers the approximate area of glazing, how the existing glass performs and how a proposed upgraded glass specification could perform.
U-value
Measures how quickly heat passes through the glass. The lower the number, the better the insulation.
G-value
Measures how much solar heat enters the building. Lower values can help reduce overheating.
Light transmission
Helps balance daylight, solar control, thermal performance and user comfort.
The calculator is not intended to replace a formal building energy assessment, and it does not guarantee savings. Every building is different. Results will depend on building orientation, glass area, heating and cooling systems, occupancy, shading, weather, maintenance and energy tariffs.
However, it gives customers a valuable starting point before committing to a glass replacement or reglazing project.
What benefits could customers see from upgrading their glazing?
A well-considered glass replacement project can deliver several benefits at once. It can restore safety, improve the look of a façade, remove cloudy or failed sealed units, reduce heat loss, manage solar gain and create a better environment for the people using the building.
Replace failed, misted, cracked or inconsistent glazing with a cleaner, smarter façade.
Help reduce cold spots, overheating and glare by selecting the right replacement glass.
Support reduced heating and cooling demand by upgrading the glass specification.
For landlords, this can help improve the quality and marketability of a building. For facilities managers, it can help reduce complaints linked to internal comfort. For occupiers, it can help create a more pleasant working environment. For project teams, it can support a smarter refurbishment strategy without automatically replacing the entire curtain walling or window system.
What if the existing frames are still usable?
One of the biggest advantages of specialist commercial reglazing is that the existing aluminium frames or curtain walling may still be suitable for retention.
Where the framing system is still serviceable, Dortech Maintenance can assess whether the glass units themselves can be replaced with a modern upgraded specification. This can often reduce disruption compared with full façade replacement while still delivering a significant visual and performance improvement.
This approach is particularly relevant for offices, schools, colleges, universities, healthcare buildings, leisure centres, retail units and public buildings with ageing glazed façades.
Project finance through HEXA Finance
Dortech Maintenance understands that a commercial glass replacement or glazing upgrade project can represent a significant investment.
That is why Dortech Maintenance has developed a relationship with HEXA Finance, giving customers a simple way to explore whether project finance could help make their glazing upgrade more manageable.
On the Dortech Maintenance Commercial Glazing Energy-Saving Model page, customers can use the embedded HEXA Finance calculator to get an indication of how much their glass upgrade project could cost if financed over time.
This can be useful for building owners and occupiers who recognise the benefit of upgrading their glazing but want to understand the potential monthly cost rather than treating the project purely as an upfront capital expense.
Before you replace like-for-like, test the upgrade option
If your building has failed glass units, old double glazing, overheating issues, high energy costs, cold internal areas or a tired-looking façade, it may be worth asking one simple question:
Could the replacement glass do more for the building?
The Dortech Maintenance Glass Energy Saving Calculator has been created to help customers explore that question. It gives you a clearer understanding of the potential benefits before you commit to a specification.
Instead of replacing old glass with another basic unit, you can look at how upgraded glazing could improve comfort, appearance and building performance.
Try the Glass Energy Saving Calculator
See how upgraded commercial glazing could improve your building’s appearance, comfort and energy performance. Then use the embedded HEXA Finance calculator to explore what your project could cost if financed.