Traditional sash window replacement for a Mansion Apartment in London

Case study: Like-for-like new sash windows for a mansion apartment in Northwest London

I purchased an apartment within a mansion block in Northwest London. Chosen for space, location and beautiful views it was in desperate need of complete refurbishment. This included building work, heating, plumbing and electrics. The windows also required urgent attention.

Having researched various timber window specialist companies I decided to contact The Sash Window Workshop. Within a couple of days of my enquiry I was contacted by the salesman. An appointment was arranged for the salesman to meet with me at the property. He listened to my requirements then conducted a thorough survey of all the windows.

My brief was exacting, I had to maintain the aesthetic appearance of twenty existing 100 year old single glazed sliding sash windows, in order to remain in keeping with the other apartments in the block.

However, it was important to me to have new double glazed windows for energy efficiency. He quickly established that the sashes (sliding parts) in most of the windows, although still serviceable, were past their best and that the original frames although needing thorough redecoration were in good condition and could be re-used.

“I am delighted with the final result and the service I received from start to finish.”

His recommendation was to manufacture new sliding sashes for each existing box frame. The new sashes would be fully draught sealed and double glazed using a low emissivity glass for the internal pane and 4mm float glass for the external pane which would provide excellent thermal benefits.

The narrow 8mm gap between the panes would be filled with Argon gas for extra insulation, this would have a low visual impact and help maintain the traditional look of the building. He also proposed to replace all the window ironmongery to finish off the new look.

I was very impressed with the salesman. He listened to my requirements, answered all the queries I had and I therefore decided to place my order.

The Sash Window Workshop manufactured the sashes and fitted them over a 12 week period, which exceeded my expectations and I am delighted with the final result and the service I received from start to finish.