Thermawood Otago specialises in upgrading existing timber windows and doors with retrofit double glazing, including any timber joinery repairs, rot restoration and draught sealing required as part of the job. We also work with heritage windows and doors, preserving original features while improving their glazing performance.
Our team brings together retrofit double glazing and timber joinery restoration specialists, giving us the skills to work with the windows you already have rather than simply replacing them. We can also retrofit double glazing into suitable existing aluminium windows.
The value of retaining existing timber windows
There are a lot of good timber windows in homes and buildings throughout Otago and Southland. Some have lasted for more than 100 years, while others are simply from an era before double glazing became commonplace. Being single glazed doesn't make them bad windows.
Timber is a natural insulator, can be repaired and adjusted, and solid existing joinery can have plenty of life ahead of it. Rather than replacing the entire window frame and potentially affecting surrounding cladding, internal linings and the character of the property, retrofit double glazing allows us to keep the timber frames and improve the glazing within them.
Where repairs are needed, we can restore the timber as part of preparing the windows for their new double glazing.
Why Thermawood?
Thermawood is a purpose-designed retrofit system for existing timber joinery. Its patented drainage system allows moisture entering the glazing rebate to escape rather than remain trapped around the timber and sealed glass unit, while Warm Edge technology improves thermal performance around the edge of the glass.
In other words, Thermawood isn't simply about fitting two panes of glass into an old window. Every component works together to support and protect your double glazing. Find out more about the Thermawood system here.
The workmanship matters too
Existing windows aren't uniform products coming off a factory line. Buildings move, timber ages, gaps vary and individual windows can need different repairs or adjustments before they're ready for double glazing.
That's where Thermawood Otago's combination of glazing and timber joinery experience really matters. We can assess the complete window, carry out any work needed to the timber and make sure it's properly prepared before the new double glazing is installed.
It's something Thermawood Otago customers regularly comment on, with reviews mentioning the team's workmanship, attention to detail, reliability and care. One customer described the team simply as “absolute craftsman.”
The staff were top class professional, friendly, and highly skilled
"We recently had Thermawood double glaze our windows, and the results are truly amazing! From start to finish, they were great to deal with. The staff were top class professional, friendly, and highly skilled. The quality of the work is exceptional. It’s rare to find a company that delivers such a high standard of both service and execution. We are so impressed that we will definitely be using them to upgrade the rest of our windows. Highly recommended!"
R Yeo