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Repairing and replacing your listed windows

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Historical buildings symbolise British Heritage and the iconic timber sash window plays a key role in the beautiful architectural design of our period homes and landmarks.

The attention to design, traditional skills and the quality of the materials used in the manufacture of original sash windows are rarely emulated today. As such the preservation of the original window is vital to sustain our British heritage.

However, the charm of historical buildings often comes with a listed status. Buildings that pre-date the 1700s, as well as many from before 1840 will be listed, and this can pose a challenge for homeowners looking to restore or replace the original windows.

The challenges of listed window repair

Any listed property homeowner will be familiar with the complexity of adhering to strict guidelines to carry out renovations, and this can often pose a challenge as older buildings will inevitably require more maintenance. Even maintaining the building’s windows can pose a problem. Windows play an integral role in the comfort of a home, eliminating drafts and reducing noise levels. In older buildings the wear and tear associated with age and the outside elements commonly leads to a requirement for renovation or replacement at some stage, but with listed properties this is not straight forward.

It is imperative that the right expertise is available for the renovation of a listed building. Knowledge of regulations alongside the skilled craftsmanship required to maintain the original design is critical.

At IWP Dansk, we have over 50 years’ experience in repairing and replacing timber windows of listed and heritage buildings and have a unique understanding of the specific needs and what can be achieved. We have also gained a vast wealth of experience in knowing what will comply with the conservation requirements of listed buildings and how to use traditional practices, tooling and materials. We work closely with conservation officers, architects, specifiers and local authority planning departments on your behalf to ensure adherence to all regulations.

Ultimately we believe that conservation is all about keeping the original character of the window in harmony with the natural charm of the period building, whilst ensuring your home is kept warm and comfortable.

Case studies

Wharfdale Hall

In 2017 we completed work on this beautiful private home in the north of England and we loved every minute of working on this property! We helped the client make some choices on the ironmongery and also carried out all the window restorations to this listed building. We love working for private clients on amazing homes like these as well as working on larger commercial projects.

Wharfdale Hall - IWP Dansk

St Gregory’s Minster

In 2015 we completed work on one of the England’s oldest church, St Gregory’s Minster, in Kirkdale, North Yorkshire. Built in 1060, the church is steeped in history and is dedicated to St Gregory who was pope in 590–604. This Anglo-Saxon church has a rare sundial above the south door, hidden within the porch. It is well preserved owing to it having been covered by a coating of plaster for several centuries prior to 1771. We restored and repaired the old oak windows for this grade I listed minster.

St Gregory's Minster Grade 1 listed window restoration

Acklam Hall

In 2017 IWP Dansk worked to restore the original oak and dormer windows for grade 1 listed Acklam Hall in Middlesbrough, as part of an extensive renovation project.

Built on land that was mentioned in the Doomsday book, the hall and its 40 acres of grounds continued as a family home until 1928 when it was purchased by Middlesbrough Council. In 1935 the hall became a Grammar school, eventually becoming a sixth form college in 1974. In 2008 the college moved out and the ‘ghost hunters’ moved in as the Hall became a haven for paranormal investigators searching for the ‘Grey Lady’ – assumed to be Charlotte Hustler who died in childbirth and is said to stand motionless at the top of the staircase.

Acklam Hall heritage window restoration

300 years later, the Hall opened its doors as a business and conference centre, restaurant and weddings venue. The developers were emphatic in their desire to create an attractive destination venue whilst ensuring that the whole development fully complemented the surrounding area. In addition, as a Grade I listed building, they were clear that it was essential that all alterations and improvements fully conformed to the rigid English heritage guidelines.

View more listed building restoration projects here.

If you would like more information about how we can help you with your listed property restoration please don’t hesitate to get in touch, email us at

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