Photo by Vruyr Martirosy

Inadequate insulation and noise reduction can make homes cold, uncomfortable, and permeated by external noise pollution.

In these cases, replacing old single-glazed windows with modern double-glazing systems helps transform living spaces into peaceful sanctuaries immune to outside intrusions and irritants.

In the next three minutes, you’ll walk you through replacing sash windows with double glazing and why double-glazing your wooden sash windows could prove one of the smartest investments for your property.

Enhancing Thermal Performance With Double Glazing

While aesthetically pleasing, most original sash windows only incorporate a single sheet of glass, hampering temperature regulation significantly.


Without a buffer between indoor and outdoor air, warmth rapidly escapes in winter while heat permeates into the home during summer.

As well as very poor insulation, deficient sealing also causes unwelcome drafts around aging window frames.

In contrast, the dual panes of hermetically sealed glazed windows deliver exceptional thermal performance. The insulating pocket of trapped air hinders conduction, convection, and air infiltration, ensuring effective thermal efficiency leading to:

  • Greatly reduced heating costs
  • Upgrading home energy efficiency
  • Safeguarding interiors from elements
  • Keeping internal environments stable

Alongside energy-saving capabilities, multi-layered glass also offers acoustic attractions.

Far outperforming single glazed predecessors, double glazed windows block disruptive external noise while preventing interior sounds from escaping.

Hence, it liberates homeowners and property owners from noise pollution, especially in dense residential areas.

Upgrading Your Replacement Sash Windows

Many owners seek to preserve the aesthetic qualities of historic windows, unwilling to compromise charming character for enhanced functionality.

Thankfully, intermediate solutions like secondary glazing allow for boosting efficiency levels significantly without sacrificing stylistic aspects.

However, for those open to a full upgrade, replacing sash windows with double glazing combines supreme energy saving and noise blocking with enduring traditional allure.

Opting to install double glazed sash windows necessitates substituting existing glass panes with slim double glazed units while retaining the original surrounds.

Utilizing narrow cavity designs facilitates accommodating sash windows’ signature sliding form without demanding deep window casement alterations.

Completed frames then simply get reintegrated into their positions, maintaining familiar swinging movements and providing a virtually identical external appearance.

Although a process necessitating more intensive building work and greater expense, double glazed sashes offer transformative upgrades:

  • Incomparable noise blocking for peaceful interiors
  • Retaining up to 65% more heat within structures
  • Enormous upsurge in energy efficiency
  • Resistance to rain, frost, and fading for longevity

Does Double Glazing Suit All Homes?

While thermal efficiency and stability augments impress universally, period properties present specific considerations around double glazing.

Care must be taken to assess elevational characteristics before proceeding, ensuring installations integrate stylistically without detracting from the integrity of historic facades.

For structures boasting intricate glazing patterns, bowed or curved form factors, or rare stained glass windows – the significance and delicacy of architectural detailing may outweigh insulation gains.

Also, be mindful that certain buildings are listed or located in conservation areas, thereby limiting permissible adaptations. Respect for heritage must balance with home improvement practicalities in these cases.

Expert guidance is essential to identify appropriate measures to balance insulation upgrades with preservation. For sense-checking viability, explore our double glazing inspection surveys.

What Is The Average Cost For Double Glazing My Home?

Well, you’ll be prepared to spend £400-£800 for an average-sized window, but smaller budgets can accommodate secondary glazing for £150-£300 per unit.

For listed buildings with atypical designs or oversized sash window repair needs, bespoke glazing costs quickly multiply.

Reassuringly, energy-saving dividends and added value from installing standard double glazing eventually offset initial outlay, though, especially for entire property schemes.

Our premium quality double glazed wooden windows are accessible from £650 per frame, with discounts available for bulk commissions.

For community-scale projects like improving the energy performance of public buildings, we offer highly competitive commercial rebates, making thermal upgrades affordable for limited budgets.

Enlisting Expert Help For Double Glazing Projects

With long-term performance hinging on the quality of installation and caliber of materials, entrust glazing upgrades like sash window double glazing to accredited experts only.

Our time-served sash window specialists have decades of experience maintaining original windows and traditional sash windows in ways that balance heat loss reduction and heritage sensitivity.

Many clients come to us seeking to upgrade from single glazing to triple glazing to improve energy bills and comfort while preserving the traditional look and feel of their homes’ existing window sashes.

Having partnered with architects and building services engineers across thousands of heritage sites over 35 years, clients know their windows are in the safest possible hands when selecting James Scott for draughtproofing and double glazing their original, traditional sash windows.