Integrating commercial window cleaning into your cleaning contract can contribute to lower energy consumption. In modern building, window cleaning can maximise natural light and improve thermal performance.
In this blog, we explore the ways in which window cleaning services can reduce energy costs and consumption.
The Link Between Windows and Energy
Windows can cause significant heat loss. Research by Myglazing found that dated underperforming windows can cause 98% of buildings to lose energy. Highlighting the importance of modern style windows which are high performing.
Heat Gain and Thermal Regulation
Well-maintained windows are essential for heat regulation. On their own, windows can help insulate spaces, such as:
- Minimises Drafts and Air Leakage: Modern windows are well insulated by their sealant, however if the sealant is worn, heat can be lost due to air leaking through.
- Glass Heat Gain: When in direct sunlight, windows will absorb large amounts of heat, especially when dirty. This heat gain can be beneficial in winter months when warmth in spaces is key. On the other hand, during winter when the external heat temperatures are lower, internal heating appliances will need to be turned on. Therefore, increasing energy costs.
When windows are un-kept, dust and dirt can create blockages for airflow and deteriorate the window sealant. By cleaning the windows, dust and dirt will be removed, optimising airflow and improving insulation removal.
Light Transmission
Dirty windows are shown to detract up to 40% of sunlight from buildings, a statistic found by Window Hero. As mentioned above, sunlight can provide beneficial heat absorption for windows.
Dust, dirt, and pollution create a thin film that can block sunlight from entering building areas. This reduces natural daylight penetration, increasing the reliance on artificial lighting.
During warmer months when natural lighting is at its peak, buildings can become very hot internally. Meaning their HVAC systems must work overtime to cool the areas down, contributing to significant negative environmental impact and energy costs.
The Role of Modern Window Designs and Window Maintenance
Although modern windows are deigned to improve building efficiency, they can not perform optimally without regular maintenance and cleaning.
Regulation Standards
In the UK, Part L of the Building Regulations sets minimum energy-efficiency requirements for buildings. Window services can contribute to this through compliance as it influences both heat retention and light transmission.
Regular professional cleaning will help maintain window integrity and transparency, supporting better Energy Performance Certificate (EPC) ratings. EPC ratings are required when selling, renting or constructing a building. Lower EPC ratings can cause potential risk of cost due to the need for improvements.
Design Elements
Tinted, reflective or coated windows can accumulate dirt just as much as regular windows can. Although the dirt can sometimes be less visible, meaning extra attention must be paid to ensure they’re clean. The windows can still benefit from cleanliness for optimal performance.
Due to the reflective elements in tinted glazing, this can cause the windows to heat at a higher rate. The dirt accumulated on these windows can affect the solar control, reducing the ability to manage heat and light. It is crucial that temperatures are regulated and controlled to ensure employee health is not affected and there isn’t a need to use other systems such as air conditioning units.
How Window Cleaning Supports Sustainability Goals
Regular window cleaning services need to align to the property managers broader sustainability objectives. As a service provider we strive to meet the net-zero target of 2050. With this goal we encourage and support our clients and suppliers to do the same.
Window services can optimise the use of natural lighting and help reduce the following costs:
- Energy Costs – artificial lighting.
- Carbon Footprint – sustainable equipment.
- Maintenance – reducing the need of repairs.
Outside of costings, cleaner windows can also contribute to improved employee wellbeing, productivity and satisfaction.
Practical Service Implementations
Modern windows require a structured plan and maintenance. The ideal frequency of cleaning services can depend on building location, season and exposure to the elements. Before agreeing to a service plan, the following topics should be considered:
| Performance and Outcomes | Compliance | Building Assessment |
| How does your contractor measure the cleaning service impact? | Can they provide evidence of health and safety compliance? | Is your window glazing tinted, reflective or double-glazed? |
| What is your contractor’s communication framework? Will they supply reports and feedback? | How are the cleaning operatives trained and are they fully compliant with industry standards? | What access to the windows does your building have? |
| Can your provider help you align cleaning schedules with energy audits or maintenance reviews? | Is the cleaning provider fully accredited (e.g., SafeContractor or ISO-certified)? | Are there particular façades or elevations that accumulate dirt quicker than others? |
Using this guide will help you to choose the right contractor for your building to ensure the service is delivered to its maximum potential.
Whilst window cleaning has previously been viewed as purely cosmetic, it is now recognised as an essential part of energy-efficient and environmentally responsible building management. Speaking to your cleaning provider on how they can implement more efficient solutions can improve building energy costs and meet compliance standards.
Get In Touch
With 50 years of industry experience, we specialise in commercial window cleaning services that support your sustainability goals and energy-efficiency targets.
Contact our friendly team today and discuss how we can provide a tailored cleaning schedule.