Call 01977 649641 (Mon-Thurs 7:30am-4:30pm Fri 7am-3pm)

Latest News

How Timber Windows Are Affected By Weather Conditions

11 May 2023



At Dempsey Dyer, we install plenty of timber windows for your customer. One of the main benefits of our timber windows is that they are extremely thermally efficient, meaning they will keep warm air inside your property.

With the summer upon us, it is important to understand how timber windows are affected in hot climates. This article will explain everything you need to know. In addition to this, the article will help you understand how your customers’ timber windows can be protected from excessive damage.

How Does Timber Contract Heat?

Once timber reacts to heat, it expands and gets bigger, which is called thermal expansion. Whereas timber from the past would have discoloured and warped easier, our modern variations are built to resist any heat or weatherproof effect. Our wood, made from Accoya, is built to resist this easily as wood is a stronger material than it’s given credit for. In comparison, steel and aluminium aren’t as good at withstanding heat. This helps the windows take the temperature in their stride.

If your customer has some wooden windows, the windows will retain moisture, especially in unpredictable weather conditions. In some cases, this affects how the wood performs because if it is exposed to too much water, this causes it to shrink and get damaged easily. This means that wood expands because of changes in humidity.

If the weather is hot, the pores of the wood will expand, causing them to release water.  This shows that wood will be able to contract heat easier.

How Does Sunlight Affect Wooden Windows?

It is important to understand how wooden windows are affected by the sunlight. If you are looking to prevent sunlight from coming into the window, use blinds or colourful curtains. This will give your customers home privacy and stop the glare from the sunlight, which can discolour and damage furniture.

What’s more, humidity and moisture are some of the main culprits that damage wooden windows, so it is ideal to store them in a cool and dry place to stop it from warping. One of the main things you should do is to check If the area around the wood is dry and ensure that the window is sealed and maintained. That way, the window won’t crack, warp, or fade, lasting a long time.

Cold Weather Has An Impact on Timber Windows

At Dempsey Dyer, we understand that timber windows are prone to moisture from cold weather. This is because timber is sensitive to moisture as the wood warps in wet conditions. Inform your customer that it is essential for wood to be kept out of wet weather. However, over drying should be avoided because this will result in cracks and splits.

Insulate the Window With Double Glazing

Double glazing is beneficial to your home as it will make sure it is thermally efficient, so heat can be retained. As a result of this, the cold air won’t be able to enter your building easily, which cuts out energy bills significantly. Inform your customer that upgrading their windows to double glazing will result in an immediate impact on how they save money.

Seal Around the Windows With Caulk

Inform your customer that caulking their wooden windows this will act as a moisturiser to seal the windows from warping. It is important to choose a caulk that is flexible and doesn’t harden in winter.

Sealing the gaps will do two things. First of all, it stops water from entering your property, saving money on repairs. Secondly, the window will stay warmer, so your customer will save money on their energy bills. It is important to inspect the windows regularly in case more caulk needs to be applied.

Regularly Inspect Moisture From the Windows

Inform your customer that mould is a common problem, especially with wood. As a result, inspecting moisture frequently is vital so it doesn’t become an issue. All it needs is a combination of soapy water and a damp cloth, then the mould will be removed. Then, the windows will look as good as new.


We hope that this article has helped you understand how timber windows get affected in tough conditions, and how to look after and maintain them. It is important because that way, they will last for many years to come.

If you want to find out more about our timber windows, get in touch with our friendly team and we will be on hand to help you. Fill out our online contact form or call us on 01977649641 and we will give you tailored advice bespoke to you.






Installers and other businesses can only work effectively if they have a reliable trade supply service – offering the highest performing products. Luckily, here at Dempsey Dyer we only supply the latest options from market leaders. This guarantees quality, performance and durability – regardless of the product choice.


Get a Trade Quote

Colour matcher

Use our online
Quoting Tool

Copyright © 2024 Dempsey Dyer Ltd | Company No. 01309583 - Registered in England and Wales | website terms and conditions | modern slavery policy