Enjoy sustainable comfort from your timber windows

Residential | Commercial | Heritage

Refurbish your timber windows and achieve huge improvements with draught seals & vacuum-insulated double glazing.

Over 20,000 windows upgraded to date with 150+ verified reviews.

Same timber windows, brand new performance

We can restore your timber windows and make them better than new.

By introducing air-tight draught seals and ultra high-performance glass you’ll achieve incredible levels of comfort, noise reduction and energy efficiency.

Keeping the noise & weather out

Our draught seals were developed through years of upgrades to timber windows in the cold climates of England, Scotland and Ireland.

They stop up to 86% of airflow and up to 10 dB of noise.


Double glaze your timber windows​

For world-class results, we are excited to be the first in Australia to offer Glavenir glazing technology by Panasonic.

Vacuum-Insulated Double-Glazing is proven to perform better than modern triple-glazed units, achieving huge improvements in comfort and energy efficiency.

For excellent results on a mid-range budget, we can also offer low-emissivity single-glazing by Viridian.

All our glass will fit within timber windows without compromising the looks, operation or integrity of the frames. Best of all, your windows will open and close smoothly, with a light touch.

Why should you upgrade your timber windows?

Using traditional craftsmanship and modern materials, we’ll restore your windows and make better than new.

This includes the installation of our weather-tight draught seals and ultra-high performance double glazing.

Whilst this can be a premium option, you will dramatically increase the functionality and energy efficiency of your windows.

By maintaining the character of your property with these modern updates, you can significantly increase your property value whilst keeping ongoing running costs down. 

Frequently Asked Questions

We repair timber windows as a part of the installation of draught seals and new glass, we often call this an overhaul. Typically we do not build new windows or undertake major repairs to timber rot or damage – we can refer you to a specialist service for this if needed.

We only work with timber or wooden windows.

This includes double-hung sash windows, casement windows, awning windows, fanlights, pivot windows, horizontal Yorkshire sliders and fixed windows.

Yes, we can install the high-performance double glazing into your timber windows.  We offer three different types of glass, which have been selected to suit the different climates throughout Australia, which can actually achieve the same performance as a triple-glazed window if necessary in your area.

Over time, many old timber windows are rattly, draughty and stuck.  This can lead to an influx of outside air, noise and dust which makes them terribly energy inefficient.  Our high-performance draught seals protect you from the outside air, noise and dust.  As part of the process of installing draught seals, we’ll also make your windows slide open and closed with a light touch and silky smooth.

Whilst it might be cheaper to rip out your timber windows and replace them with new plastic or aluminium double-glazing units. You will instantly lose the character of your property and it will never look the same.  Keeping original wooden windows maintains and arguably increases the value of your property.

Replacement window frames can cause problems with other parts of the window opening. And they simply won’t look right.

Your old timber windows are made of old-growth timber, that has stood the test of time in most cases.  And with a little TLC and some new upgrades, they can outperform a new window & the frame could last another 100 years.

Over 150+ verified reviews

Hobart, Tasmania
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We had the windows in our 1960s weatherboard house replaced with Glavenir vacuum glass and are stoked. It's so much quieter, and there seems to have been a dramatic improvement with heat loss as well. The team - Scott, Ruud, Bal and Julian - were absolutely delightful, so efficient and pleasant to deal with, and they did a great job of keeping the house clean while doing the job. I would definitely recommend Sealasash.
Tim Issacson
St Kilda, Victoria
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Andrew and the team, were quick, polite and thorough in replacing the glazing of sash windows in my early Victorian cottage in St.Kilda. The windows side better than ever and the Glavenir glazing product has specs equivalent to triple glazing I understand. Can't wait to experience a toasty winter with less energy usage. The house was left mess free.
Davo A
West Hobart, Tasmania
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We got our sash windows on a 1900s weatherboard upgraded to Glavenir vacuum glass- its amazing. Quieter and less heat transfer than some double glazed windows we have also- and we kept the original sashes. The guys put in draught seals on windows and doors which have made a big difference too. Everything ran smoothly, to schedule and budget. Excellent work and excellent product. Thanks Scott, Jack and the crew!
Ryan Harper
Cryodon, Victoria
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I’ve recently used Sealasash to restore my home’s original timber windows (circa 1940s) and install draught seals. Andrew worked on my house solo and did an absolutely tremendous job. All windows are back to being fully functional and I’ve already observed a drastic improvement thanks to the work undertaken. No cold morning air makes its way through the gaps in the windows meaning the house heats up far quicker, and I’m finding it also holds a steady temperature better than it ever has. Highly recommend using Sealasash to restore your windows.
Battery Point, Tasmania
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Absolutely would recommend Sealasash. Professional, friendly and knowledgeable staff. I am very happy and impressed with their work.
Rachel Robinson
St Kilda, Victoria
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The team at Sealasash completed the work as expected. They were so friendly, polite, knowledgable and informative. The work was completed in the time expected, everyone worked hard and the clean up was great. I wouldn't hesitate to use this service again.
David Allen
Richmond, Tasmania
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Scott, Rulid and their team did a great job in rejuvinating our windows. They'd had their day (the windows that is), draughty, broken winding mechanisms the lot. With new glass they've been dragged kicking and screaming into the 21st century! And as a bonus they now open and shut. Thank you also to John and Jack. Everyone showed attention to detail well done all.
Glenn Dixon
Carlton, Victoria
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We were delighted with the quality of the window repairs and the way the team conducted the work. They were efficient, reliable, clean and respectful of the communal property in our apartment complex. We've noticed huge acoustic and weather sealing improvement already—definitely recommended!
John Mills
Battery Point, Tasmania
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I have recently upgraded my previously rejuvenated sash windows upgraded to the Glavenir glass from Panasonic by the Sealasash team. The result is nothing short of amazing. The installation team led by Scott were extremely professional and it all went seamlessly. The thermal and acoustic results are everything and more than what I was hoping for. I can thoroughly recommend this product and the entire Sealasash team.
Andrew Leech
Heidelberg Heights, Victoria
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We're very happy with the job that was done! The windows feel great and I'm sure will look perfect one I finish painting them. While it's hard to measure, the house did seem noticeably quieter that night and the windows feel secure and open/close perfectly.

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