Thermawood New South Wales

Thermawood New South Wales Thermawood NSW specialises in retrofitting double glazing to existing timber window frames.

We keep homes and properties throughout New South Wales (from Sydney to Newcastle) and Australian Capital Territory comfortable with our Thermawood Retrofit Double Glazing System for existing or new timber joinery. The benefits of upgrading your windows with us include:

Energy Efficiency: our system can keep your property cooler in the summer or warmer in the winter
Retain Character: we retrofit

double glazing to existing timber joinery
Reduce Noise: our system can reduce external noise substantially
Reduce draughts: by installing draught seals into your existing frames
Low E Glass for Maximum Effect: the IGU units can use any type of glass
Reduce Condensation: our system is designed to drain moisture from the rebate around the double glazing
Good for the Environment: our system can drastically reduce your energy requirements

Learn more about the Thermawood Retrofit Double Glazing System or request a free quote at https://www.thermawood.com.au/

You close the window, but the room still has that little winter chill.That usually means the window is shut, but not per...
26/08/2026

You close the window, but the room still has that little winter chill.

That usually means the window is shut, but not performing as well as it could. Older timber windows can develop small gaps over time, letting cold air creep in and warm indoor air escape.

The glass can also be part of the problem. Single glazing does very little to slow heat transfer, so even if the window is closed, the room can still feel cold near the glass.

Thermawood Retrofit Double Glazing addresses both issues in one retrofit process. We fit an insulated glass unit into your existing timber windows and install high quality continuous draught seals to help keep cold air out and comfortable air inside.

It is not about replacing the timber windows your home already has. It is about helping them perform better for everyday comfort.

Learn more at www.thermawood.com.au

Don’t Replace, Retrofit.

Can you keep the timber windows you love and still reduce condensation?For many homeowners, the timber windows are part ...
24/08/2026

Can you keep the timber windows you love and still reduce condensation?

For many homeowners, the timber windows are part of the story of the home.

The shape, the detail, the proportions and the craftsmanship all belong there.

But cold mornings and wet glass do not need to be part of the deal.

Condensation often forms when warm indoor air meets a cold single glazed surface. Because single glazing can become very cold on the inside, moisture in the air is more likely to turn into water droplets on the glass.

With Thermawood Retrofit Double Glazing, your existing timber windows are upgraded through a patented retrofit system. High performance double glazing is fitted into the existing timber frame, helping the inside glass surface stay warmer and reducing the conditions that lead to condensation.

The result is improved moisture control, a more comfortable home, and the timber character you wanted to keep in the first place.

Learn more at www.thermawood.com.au

Don’t Replace, Retrofit.

Have you ever wondered why a retrofit double glazing system needs more than just an insulated glass unit?Most people foc...
21/08/2026

Have you ever wondered why a retrofit double glazing system needs more than just an insulated glass unit?

Most people focus on the glass, but what happens around the glass is just as important.

If moisture finds its way into the glazing rebate and has nowhere to escape, it can remain against the timber and around the edge of the double glazed unit. Over time, prolonged moisture exposure can affect both the existing timber window and the seals of the double glazed unit.

That is why Thermawood Retrofit Double Glazing uses a patented dry glazing and drainage system as part of its complete retrofit process.

The drainage track is designed to give moisture a controlled path to escape, helping protect the existing timber window and helping protect the double glazed unit from prolonged moisture exposure.

It is important to understand that this is a different benefit from condensation reduction. Condensation is primarily reduced by the performance of the insulated glass unit, while the drainage system is designed to help manage moisture within the glazing system itself.

A complete retrofit is about more than installing better glass. It is about using a system where every component has a purpose.

Learn more at www.thermawood.com.au

Don’t Replace, Retrofit.

Most people notice the glass first.But with retrofit double glazing, what happens around the glass matters just as much....
19/08/2026

Most people notice the glass first.

But with retrofit double glazing, what happens around the glass matters just as much. If moisture gets trapped inside the window system, it can sit against the timber and affect the insulated glass unit over time.

That is why Thermawood Retrofit Double Glazing is designed to do more than upgrade the glass. Our patented drainage system helps moisture drain away instead of becoming trapped, helping protect your existing timber windows while improving comfort.

It is a smarter retrofit approach for homes where the timber windows are worth keeping.

Because great retrofit double glazing is not only about what you see. It is also about what keeps working quietly behind the scenes.

Don’t Replace, Retrofit.

Ever wish your home office was more peaceful?A comfortable workspace is about more than a good desk or an ergonomic chai...
17/08/2026

Ever wish your home office was more peaceful?

A comfortable workspace is about more than a good desk or an ergonomic chair. If outside noise constantly interrupts your focus, your windows may be part of the problem.

Older single glazed timber windows allow everyday sounds like traffic, neighbours and outdoor activity to travel indoors, making it harder to concentrate throughout the day.

With Thermawood Retrofit Double Glazing, we retrofit high performance double glazing into your existing timber windows instead of replacing them. Combined with integrated acoustic seals, our patented retrofit system helps reduce unwanted outside noise while preserving the character of your home.

A quieter workspace could start with the windows you already have.

Don't Replace, Retrofit.

Some homes feel cosy in winter without the heater working overtime.The difference is often not how much heat you add. It...
14/08/2026

Some homes feel cosy in winter without the heater working overtime.

The difference is often not how much heat you add. It is how long your home can keep that warmth inside.

Older single glazed timber windows can let heat escape quickly. So even if the room feels warm for a while, it can cool down again soon after the heater turns off. That is when winter comfort starts feeling expensive and inconsistent.

Thermawood Retrofit Double Glazing helps by retrofitting an insulated glass unit into your existing timber windows. The extra layer of glass and sealed insulating gap help slow heat loss, while draught seals help reduce cold air movement around the window.

The result is a home that feels warmer for longer, using the timber windows you already have.

If your home cools down too quickly in winter, your windows may be part of the reason.

Learn more at www.thermawood.com.au

Don’t Replace, Retrofit.

Ever noticed one room in your home turns into the hot room every summer?It often comes down to the windows. Single glazi...
12/08/2026

Ever noticed one room in your home turns into the hot room every summer?

It often comes down to the windows. Single glazing lets sunlight and heat pass through easily, so rooms with large or exposed windows can warm up much faster than the rest of the house.

That is why window performance matters in summer, not just winter. When heat moves through the glass too easily, your home can feel harder to keep comfortable.

With Thermawood Retrofit Double Glazing, your existing timber windows are retrofitted instead of replaced. The system upgrades them with an insulated glass unit, helping slow heat transfer so your space feels cooler, calmer and more comfortable, while keeping the windows you already have.

Discover more at www.thermawood.com.au

Don’t Replace, Retrofit.

Some homes feel like they are always fighting the weather.Too hot in summer. Too cold in winter. Never quite comfortable...
10/08/2026

Some homes feel like they are always fighting the weather.

Too hot in summer. Too cold in winter. Never quite comfortable for long.

A common reason is single glazed timber windows. In summer, heat can move through the glass and make cooling harder. In winter, warmth can escape through the same glass, while small gaps around ageing windows let cold draughts in.

That is why temporary fixes like heavy curtains or plastic film only go so far. They might help a little, but they do not properly upgrade the glass or seal the air leaks.

Thermawood Retrofit Double Glazing upgrades your existing timber windows through a specialised retrofit process. A sealed insulated glass unit is fitted into the existing timber frame, while continuous draught seals help reduce air leaks when the window is closed.

The result is year round comfort that works with the timber windows you already have.

Learn more at www.thermawood.com.au

Don’t Replace, Retrofit.

The best part of a good retrofit is that it should not look like a big intervention once the work is finished.During a T...
29/07/2026

The best part of a good retrofit is that it should not look like a big intervention once the work is finished.

During a Thermawood Retrofit Double Glazing installation, the existing timber frame is carefully worked on so it can hold the insulated glass unit while still keeping the original window character.

For this set of double hung windows, the final restoration touches are all about making the finish feel natural, tidy and true to the home.

The aim is simple, make it look like we have never been there, except the window now performs better.

Don’t Replace, Retrofit.

That faint musty smell in a clean room can be confusing.You wipe the surfaces, open the window, maybe blame the carpet, ...
27/07/2026

That faint musty smell in a clean room can be confusing.

You wipe the surfaces, open the window, maybe blame the carpet, but the smell keeps coming back. One place people often forget to check is the window itself.

Older single glazed timber windows can become cold on the inside. When warm indoor air touches that cold glass, condensation can form. If that moisture sits around the glass, beading or timber edges for too long, it can create the damp conditions mould needs, sometimes before you can actually see it.

That is why the smell matters. It can be an early sign that moisture is building up quietly.

Thermawood Retrofit Double Glazing helps by retrofitting an insulated glass unit into your existing timber windows. The warmer inner pane helps reduce condensation, while the patented drainage system helps direct water away safely. Vented beading also helps vapour escape instead of becoming trapped in the window rebate.

So if a room smells musty but still looks clean, your windows may be worth checking.

Learn more at www.thermawood.com.au

Don’t Replace, Retrofit.

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3/176 South Creek Road
Cromer, NSW
2099

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