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One of the benefits of a sash window is how easy it is to work with. So, if you are looking to save money, you should consider a DIY sash window restoration. This means that you will be able to do most of the restoration and installation processes yourself. To make sure that this all goes smoothly, there are several processes that you should follow.

Know Your Limitations

Before you start the project, you should be aware of your own limitations. This will ensure that everything is done safely. For example, you might not have the skills to replace cracked or broken glass yourself. In this case, you should contact a professional. You should also be aware of the type of machines that you can operate safely.

Suggested further reading: Beyond reviews: finding the right company to restore your sash windows

Do Your Research

You should also make sure to perform your research. Thankfully, this has become easier due to the internet. There are multiple resources that you will be able to go to for accurate information. This will make it easier for you to perform a renovation. If possible, you might want to use videos. By seeing the correct procedures, you will find it easier to make sure that you are doing the right thing.

Know the Problems

If you are sourcing a sash window frame, you should make sure that you understand the issues it has before you buy it. For this reason, whenever possible, you should have an in-person inspection. Some online sites make it easy for sellers to obscure the problems with the product. When you view it in person, it will be easier for you to spot major problems like rot or cracked glass. Once you are comfortable understanding the problems and know that you will be able to fix them, you can purchase the frame. The good news about buying a second-hand sash window is that they tend to be much less expensive.

Preparing the Sash Window

Before you can mount it, you should make sure that you’ve prepared it properly. When doing this, there are several aspects that you must consider. First, you will have to think about the type of glass that is currently installed. There are multiple types of glass available on the market. It’s important to do your research so that you find the one that is right for you. Once you know which type of glass you want, you will need to have it installed in the window. In some cases, this might mean removing the existing glass and having it replaced.

You might also want to consider things like the condition of the frame. In some cases, you will need to have the rotten sections removed. In most cases, you will have the paintwork updated. You might also need to check that everything is working properly. This means checking the sash is attached properly. You might also want to check if the lock works properly. Once you are happy with the window sash, you may then have it installed.

Installing the Windows

In some cases, you might have an existing frame where you want to install the window. In this case, you will need to prepare and insert the new window. However, this might not always be the case. Deciding to install the window yourself gives you a lot more creative freedom. However, it will be more expensive than replacing an existing window.

If you want to install it in a new location, you should think about where you will put it. When doing this, you should find out which area would get the most benefit from having more natural light. You should also think about how the window would work stylistically. This can be a very difficult decision. However, you might be able to get some help from online sources. For example, you find some inspirational images that you like. This will often present multiple ideas that you can use to find what will work for you. You should also keep in mind the dimensions of the window. Once you know where you want to install the window, you might want to mark out the space on the wall.

Before you install anything, you should get a professional. Installing a new window will take a lot of skill. Getting a professional will also ensure that you don’t do any damage to the structure, like cutting through a supporting beam. They will also have access to specialized equipment, to make sure that the installation process is carried out successfully. Finally, you might also be under a legal obligation to have a professional carry out this kind of building work.

Sealing the Window

Once you’ve installed the window, you will need to check the seal. If you used a professional service, they have probably done this for you. However, it can’t hurt to double-check that everything has been sealed properly. If you are doing the installation yourself, you will need to re-seal the window. Thankfully, this is a fairly simple process.

First, remove the window trim. Then, replace it using a sealing putty. Leave the putty to dry, then return and trim off any excesses. Once done, you can put the trimming back on. In some cases, you might need to apply a new coat of paint to the window. A key part of maintaining your windows is checking the sealant. If needed, repeat this process. This will ensure that your house is as energy-efficient as possible. This will save you money, as you don’t need to spend as much to heat or cool the property.


DIY renovations remain one of the best options to save money. However, there are some things that you need to do to make sure that everything is done properly. Hopefully, you will be able to use these tips in your next DIY sash window restoration. This will ensure that everything will be done properly, so you end up with a beautiful new feature in your home.

Pieter Boyce - Wooden Window and door specialist

Pieter Boyce
Wooden Window and Door Specialist

This article was written on behalf of Fortis & Hooke by Pieter Boyce. Pieter has an intense passion for English Architectural history and has been specialising in the conservation of original wooden windows and doors for decades. His exceptional knowledge of timber windows and doors, both listed or non-listed, is attributed to his hands-on approach to learning all aspects of the complete restoration of original features as well as having personally surveyed thousands of items throughout his long tenure as a head surveyor for one of the largest window and door restoration companies in the UK. He now runs a boutique wooden window and door consultancy and fervently champions the retention of original windows and doors. To learn more of Pieter’s services, visit his website at www.boultonboyce.co.uk.

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