Ventrolla offer many glazing options

Whether you just want to repair your existing glazing or upgrade the performance of your windows, Ventrolla can help. they offer:

  1. Existing Single Glazing repair
  2. Upgraded Double Glazing
  3. Vacuum Glass Upgrade
  4. Secondary Glazing


Vacuum Glazing

In the pursuit of sustainable and energy-efficient solutions, vacuum glazing stands out as a revolutionary advancement in window design. This innovative technology presents a multitude of advantages that not only elevate the comfort of our living environments but also play a crucial role in minimising our environmental impact by reducing carbon emissions.

Vacuum Glazing Benefits:

  • More comfort.
  • Thin and light.
  • Low carbon emissions.
  • Sustainable development.
  • Advanced fenestration technique (highly insulated window by enclosing two glass panes with a micro-thin gap)
  • Vacuum glazing (Vacuum) / Double glazing (Air and Gas)
  • Elimination of air and gas reduces conduction convection and heat loss.
  • Vacuum glazing offers tempered glass as standard (U Value <0.4W/m2k) with up to 80% light transmittance.
  • The minimum thickness is 6.3mm with a weight of 15 kg/m2.
  • Vacuum glazing has a 15-year warranty but a life expectancy greater than 25 years
  • High thermal insulation.
  • U Value <0.4W/m²K
  • No condensation under -60℃
  • There is no expansion or contraction.
  • Toughened as standard.
  • Lead free.
  • Fully recyclable.

Unrivalled Thermal Performance

  • With U-values as low as <0.4W/m²K, vacuum glazing outperforms other insulated glazing methods, including triple glazing.
  • It helps maintain stable indoor temperatures, reducing the need for artificial heating/cooling and resulting in substantial energy savings.
  • Perfect for buildings with a high percentage of glass, such as schools and offices.


What is vacuum glazing, and what are the benefits to Heritage Property?

Vacuum glazing is an advanced window technology that involves creating a thin, airtight space between two panes of glass, which is then evacuated to create a vacuum. This vacuum greatly reduces heat transfer between the interior and exterior of a building, resulting in improved thermal insulation compared to traditional double- or triple-glazed windows. Here are some benefits of vacuum glazing for heritage properties:

  1. Preservation of architectural integrity: Vacuum glazing allows heritage properties to maintain their original aesthetics by providing a slim profile that closely resembles traditional single-pane windows. This helps preserve the historic charm and character of the building.
  2. Enhanced energy efficiency: By minimising heat transfer, vacuum glazing helps regulate indoor temperatures more effectively, reducing the need for heating and cooling systems. This leads to lower energy consumption and decreased utility costs, which is particularly beneficial for older buildings with inefficient heating and cooling systems.
  3. Protection of historical features: Vacuum glazing can help protect delicate interior furnishings, finishes, and artefacts from damage caused by UV radiation and fluctuations in temperature and humidity. This is essential for preserving the historical integrity of heritage properties and ensuring their longevity.
  4. Compliance with conservation regulations: Many heritage properties are subject to strict conservation regulations that govern any alterations or improvements to the building envelope. Vacuum glazing offers a modern solution for improving energy efficiency without compromising the architectural significance or heritage value of the property, making it easier to obtain regulatory approval for renovation projects.
  5. Improved comfort and occupant satisfaction: Vacuum glazing reduces drafts and cold spots near windows, creating a more comfortable indoor environment for occupants. This can enhance the usability and livability of heritage properties, making them more attractive to residents, tenants, and visitors alike.

Overall, vacuum glazing offers heritage property owners a sustainable and energy-efficient solution for improving the performance of their windows while preserving the unique historical character of their buildings.


A new Venetian sash window, by Ventrolla

A new Venetian sash window, by Ventrolla


Slim Double Glazing

Slim double glazing, also known as slimline double glazing, is a type of double glazing system designed to fit into narrower window frames, particularly in older or historic properties where the original windows have slim profiles. Traditional double-glazing units are typically too thick to fit into these narrow frames without significant alteration, which can compromise the aesthetic and architectural integrity of the building.

Ventrolla, a company specialising in the repair, restoration, and improvement of traditional sash windows, utilises slim double glazing as a solution to enhance the energy efficiency and comfort of historic properties without compromising their original appearance. Here’s how and why Ventrolla uses slim double glazing:

  1. Slim Profile: Ventrolla’s slim double-glazing units are specifically designed to have a reduced thickness compared to standard double-glazing units. This allows them to fit seamlessly into the existing window frames of older properties without the need for extensive modifications or replacements.
  2. Preservation of Aesthetics: Historic properties often have distinctive window designs and profiles that contribute to their architectural character. Ventrolla understands the importance of preserving these aesthetics and ensures that their slim double-glazing units maintain the original look and feel of the windows.
  3. Improved Energy Efficiency: By incorporating slim double glazing, Ventrolla helps improve the thermal insulation of windows in historic properties. This reduces heat loss during colder months and minimises heat gain during warmer months, leading to enhanced energy efficiency and reduced heating and cooling costs.
  4. Sound Insulation: In addition to improving thermal performance, slim double glazing can also help reduce external noise transmission, creating a quieter and more comfortable indoor environment for occupants of historic properties located in busy urban areas or near noisy streets.
  5. Compliance with Conservation Guidelines: Many historic properties are subject to strict conservation guidelines and regulations that govern any alterations or upgrades. Ventrolla’s use of slim double glazing allows property owners to enhance the energy efficiency and comfort of their windows while remaining compliant with conservation requirements.

Overall, Ventrolla’s use of slim double glazing offers a practical and sympathetic solution for improving the performance of windows in historic properties, allowing them to benefit from modern energy-saving technologies without sacrificing their architectural heritage.


Avoid renovationAvoid renovation mistakes with a Ventrolla window's professional mistakes with a Ventrolla window's professionals


If your sash or casement windows need repairing or renovation, or you are looking for replacement windows to mirror existing ones, upgrading the glazing will save energy, money, and the environment.


heritage secondary glazed window

Ventrolla Secondary Glazing

Ventrolla secondary glazing is a window enhancement system designed to improve the thermal and acoustic performance of existing windows, particularly in older or historic properties where the original windows cannot be replaced or significantly altered. It involves installing an additional layer of glazing on the interior side of the existing window, creating a sealed air gap between the primary window and the secondary glazing unit.

Here’s an overview of Ventrolla’s secondary glazing:

  1. Installation: Ventrolla secondary glazing is custom-designed and installed by Ventrolla professionals to fit precisely within the existing window reveal. The secondary glazing unit is typically mounted on a discreet subframe, which allows for easy installation without affecting the integrity of the original window frame.
  2. Materials: Ventrolla secondary glazing units are constructed from high-quality materials, including aluminium and timber depending on the specific requirements and aesthetic preferences of the property owner. The glazing panels are typically made from toughened or laminated glass for durability and security.
  3. Benefits:
    • Improved Thermal Efficiency: The sealed air gap between the primary window and the secondary glazing unit acts as an additional barrier against heat loss, helping to reduce energy consumption and lower heating costs.
    • Enhanced Sound Insulation: Ventrolla secondary glazing effectively reduces external noise transmission, creating a quieter and more comfortable indoor environment for occupants, particularly in urban or noisy areas.
    • Protection: The secondary glazing unit provides an extra layer of protection for the original window, helping to prolong its lifespan by shielding it from the elements and reducing the risk of damage or deterioration.
    • Security: Depending on the design and specifications, Ventrolla secondary glazing can also enhance the security of the property by adding an additional barrier against forced entry or intrusion.
  4. Versatility: Ventrolla secondary glazing can be tailored to suit a variety of window types and styles, including sash windows, casement windows, and bay windows. It is available in a range of configurations, such as fixed panels, hinged units, or sliding panels, allowing for easy access to the primary window for cleaning and maintenance.

Overall, Ventrolla secondary glazing offers a practical and non-intrusive solution for improving the performance of existing windows in historic properties, helping to enhance comfort, energy efficiency, and preservation while retaining the original architectural character and charm.

How It Works

  1. Comprehensive Assessment: Our experts conduct a thorough assessment of your windows and doors to identify potential gaps and areas of improvement.
  2. Bespoke Solutions: Based on the assessment, we provide tailored solutions to address specific sealing needs, ensuring maximum effectiveness.
  3. Professional Installation: Our skilled technicians upgrade your glazing, ensuring a seamless integration that complements the existing architecture.
  4. Quality Assurance: Ventrolla is committed to delivering excellence. Our glass undergoes rigorous quality checks to guarantee optimal performance and durability.

Transform Your Space Today!

Take the first step towards a more comfortable, energy-efficient, and elegant living or working environment. Contact Ventrolla today to schedule a consultation and discover how our Ventrolla Perimeter Sealing System can transform your space.

Ventrolla – Redefining Comfort, One Seal at a Time.

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