About Ventrolla

As heritage specialists, Ventrolla is obsessed with restoring heritage timber windows and doors, and has been for over 40 years.

Our Team

We share a deep passion for preserving heritage, combining exceptional craftsmanship, attention to detail, and decades of experience.

Projects

Working with some of the most discerning heritage property homeowners and retrofit architects, contractors, and surveyors on their restoration projects.

Timber Windows

With nationwide coverage, you always benefit from local British craftsmanship.

Timber Doors

Manufactured in our bespoke joinery houses.

Enquire

Give your heritage building the craftsmanship it deserves.

Consultancy & project management

Ensuring seamless and efficient execution for commercial projects.

Projects

Working with some of the most discerning heritage property homeowners and retrofit architects, contractors, and surveyors on their restoration projects.

St Leonard’s Hospital

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Location

Hackney, London

Restoring an iconic hospital façade.

On Nuttall Street in Hackney stands the venerable St Leonard’s Hospital, a Grade II listed building steeped in rich heritage. Our project was to breathe new life into 160 of its distinguished sash windows, each a silent witness to the hospital’s heroic past.

Built in 1866 and expanded by 1872 to accommodate 503 patients, St Leonard’s has long been a beacon of care, notably tending to air raid casualties during the Second World War. The hospital now provides physiotherapy, chiropody, and other vital services administered by the Homerton University Hospital Foundation Trust. Preserving the unique character of this heritage building while enhancing the performance of its windows required Ventrolla’s specialised expertise and our deep understanding of heritage regulations.

Ventrolla’s window restoration formed part of a 6-month refurbishment project at St Leonard’s, overseen by Castons of Ipswich. Each timber window underwent a meticulous inspection to assess its condition, allowing us to develop a tailored restoration plan that adhered to the complex requirements of Listed Building Consent.

Technology

Our frictionless, premium renovation service involved installing the Ventrolla Perimeter Sealing System (VPSS) on all existing windows, creating an invisible barrier against draughts.

Our master craftsmen, renowned for their precision and heritage pedantry, meticulously replicated each window’s original features and fitted new, hand-forged ironmongery.

 

SRS

Sash Removal System (SRS) is discreetly mounted in the side of the sash, allowing safe and easy removal of both the upper and lower sashes to
give free access to the window box frame, and is not visible either internally or externally during the normal operation of the sash window.

 

VPSS

Our innovative draught-proofing technology creates an effective barrier against cold air entering the property. Expertly installed brush piles discreetly seal gaps without hindering window operation, maintaining both aesthetics and functionality.

30%

IMPROVEMENT IN ENERGY EFFICIENCY

6-10db(A)

NOISE REDUCTION LEVELS OF UP TO 6-10db(A)

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Commercial project managerSt Leonard’s Hospital

“The condition of the windows varied enormously. Some just needed reglazing or minor repairs to the window frame, while others needed a complete overhaul.

We had to be flexible in the way we worked because the hospital remained operational throughout the project. In some cases, for example when repairing windows in a consultation room, we opted to stay late or come in over a weekend in order to reduce disruption.”

Precision Heritage

To keep the hospital operational and minimise disruption, our highly skilled installers worked flexibly, including evenings and weekends, ensuring the building remained weathertight and secure at the end of each day. A final, rigorous quality and performance inspection confirmed that every window was integrated to the highest standards, achieving the benchmark of perfection that this iconic, Grade II listed façade truly deserves.

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Master craftsman Ventrolla

“The condition of the windows varied enormously. Some required re-glazing or minor frame repairs, while others needed a complete overhaul. We meticulously restored each window to its original beauty, enhancing functionality and comfort for both patients and hospital staff.”

Projects

Ventrolla’s obsession with bespoke timber restoration means you don’t have to settle for anything less than perfection. So perfect, in fact, we don’t expect you to see the difference. Just feel it.

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Get in touch

Enhance your building’s character, value, and efficiency.

For an expert consultation, condition report, and estimate – or for bespoke advice or brochure requests – please get in touch: