Service
Retrofit double glazing for original wooden windows
Double glazing fitted into the timber joinery you already have. Warmer, drier and quieter, without replacing the windows that give the house its character.

What retrofitting means
Your existing timber sashes and frames stay exactly where they are. We take out the single pane, machine the rebate to take a sealed double glazed unit, and fit it into the original joinery. From the street the window looks the same. From inside, the house is warmer, drier and noticeably quieter.
In Dave's words, our double glazing makes homes built in the 19th and 20th centuries more liveable, while retaining their authenticity.
Why not just replace them?
Because on a villa, a bungalow or a character home, the joinery is a large part of what the house is. Aluminium replacements change the proportions, the glazing bars, the sight lines and the reveal depth. They are also permanent. Once original kauri or rimu joinery is out of a house, it does not come back.
Retrofitting keeps the fabric of the building and solves the problem that actually bothers you, which is usually condensation, cold and noise.
What it fixes
- Condensation running down the inside of the glass every winter morning
- Rooms that will not hold heat no matter what you spend on heating
- Traffic and street noise, particularly on main roads
- Curtains doing all the insulating work by themselves
Suitable for
Villas, bungalows, character homes, cottages, heritage listed buildings and anything with original wooden framed windows. We work throughout Christchurch and Canterbury. Because we are joiners first, any repair the frames need can be done at the same time, which is often the case with older sashes where the bottom rails have weathered.
The process
- We come and look at the windows and measure up
- You get a written quote covering the units, the machining and any joinery repair needed
- The work is done, sash by sash, with as little disruption as we can manage
- Frames are made good and refinished
What it costs
It depends on the number of windows, the size and condition of the frames, and whether any joinery repair is needed along the way. There is no useful per window figure we could publish that would not mislead you. Get in touch and we will quote the actual job.
Cold house, original windows?
Tell us roughly how many windows and what sort of house it is, and we will arrange a time to look.