Thermal Efficiency

Original sash windows are a beautiful feature, particularly in period homes, listed buildings and conservation areas, but they can often allow heat to escape, cold air to enter and external noise to travel through if they have not been properly maintained or upgraded.

Our thermal efficiency upgrade service is designed to improve warmth, comfort, acoustic performance and everyday usability without compromising the look of your existing windows. By carefully assessing the condition of your sash windows, we can advise on the most suitable approach, whether that involves targeted glazing upgrades, full sash window restoration, professional draught proofing or a combination of services.

Depending on the property, we can offer a range of specialist glazing options, including vacuum glass, slimline double glazing, acoustic glass, restoration glass, security glass and fire-rated glass. These options allow traditional sash windows to be upgraded in a way that supports modern performance needs while remaining sympathetic to the age, style and requirements of the building.

Thermal upgrades often work best when carried out alongside restoration. If the timber is damaged, paintwork has failed, cords are worn or the sashes no longer operate smoothly, restoring the window first can create the right foundation for improved performance. Our sash window restoration service includes repairing rot and decay, addressing mechanical faults, replacing sash cords, checking pulleys and ensuring the weights are correctly balanced so the windows move as they should.

Draught proofing also plays an important role in improving thermal efficiency. Our discreet draught-proofing system helps reduce heat loss, cold spots, rattles, dust and noise while maintaining the traditional appearance of the window. By combining draught proofing with suitable glazing upgrades, your sash windows can become warmer, quieter, safer and more practical for modern living while still retaining their original charm.

We understand that every property is different, so our team will always recommend the most appropriate solution for your windows. In some cases, this may involve preserving and upgrading the existing sashes. In others, newly made sashes may be considered where the original timber is too badly damaged, while retaining the existing box frame where suitable.

From careful inspection through to repair, draught proofing, specialist glazing, redecoration and thermal improvement, Nexus of Bath Limited provides a sympathetic and professional service built around quality, performance and respect for traditional properties.