Draught Proofing Sash Windows: What You Need to Know Before Getting Started

Welcome to the world of timber sash windows, where beauty and functionality meet. If you’ve been struggling with cold drafts and high energy bills, then draught-proofing may be the solution you’re looking for.

In this article, we’ll take a look at the process of draught-proofing for timber sash windows, its benefits, and how to maintain it properly. We’ll also talk about the steps involved and the costs associated with this essential process.

The Benefits of Sash Window Draught-Proofing

Cold draughts

Draught-proofing your windows stops cold air from entering your home and improves its ability to retain heat. Plus, with professional installation, you won’t have to sacrifice the charm and beauty of your traditional sash windows.

Window rattling and outside noise

Have you ever experienced the annoyance of window rattling during windy weather? Well, draught-proofing can reduce this rattling and bring some much-needed peace to your home.

It also can dampen the sound from outside noise, such as noisy traffic.

Functionality restore

Let’s not forget about the smoothness of the sash window movement. No more struggling to open or close your windows, no more creaking or sticking – just smooth, effortless operation.

Excellent investment for saving money!

Last but not least, draught-proofing can also save you money on your heating bills. The window’s ability to withhold heat after the draughting process means less energy needs to be used to keep your house warm!

Sash window draught proofing cost

The cost of draught-proofing your sash windows can vary depending on the size of the window and the level of access, from £250-£400.

Additionally, combining draught-proofing with a window frame restoration is often recommended since the original frame may be rotten or require attention.

Assessment And Preparation

1 – Assessment and preparation are the first vital steps before starting any project. That’s why our team of experts carefully inspects each window frame and sash for any signs of damage, decay or wear and tear.

2 – Specialised equipment removes any loose or damaged material, and then wood filler is applied to fill in the gaps. We also examine the window seals for any gaps or signs of wear and tear and replace them with new ones.

3 – To ensure that the weatherstripping and other materials adhere properly, the windows are cleaned thoroughly with a damp cloth or sponge.

4 – We understand that clients often want to maintain the charm and character of their homes, which is why we pick materials that blend seamlessly with your existing windows before our work.

Our attention to detail and commitment to quality ensures that our clients are satisfied with the end result.

Draught Proofing process

1 – First, we’ll eliminate those old, worn-out staff and parting beads – they’ve done their time.

2 – We gently remove the sashes and cords (no need to call in heavy machinery).

3 –We’ll get creative and make some grooves on the sashes for draught excludes.

4 – Once those grooves are ready, it’s time to install some brand-spanking-new draught excluder seals.

5 – But wait, we’re not done yet.  We will also replace those tired old staff and parting beads with shiny, new ones with pre-installed weather strips.

6 – However, I have experience writing sales letter copy and I know After completing the initial stages of draught-proofing your sash windows, the next step is to install draught-proof strips to the top and bottom rail, as well as the meeting rail.

These strips help to create a tight seal and prevent any cold air from entering your home through the gaps in the window frames. They’ll be so discreet, you won’t even know they’re there (but your energy bill will).

 Finishing Touches

Once you’ve completed the draught-proofing process for your timber sash windows, it’s important to add some finishing touches to improve their appearance and maintain their effectiveness.

We do this by applying a coat of paint or sealant specifically designed for timber windows.

This provides an extra insulation layer and protects the windows from moisture damage and decay.

We choose a paint or sealant compatible with the weatherstripping and caulking materials we’ve used for your window.


Draught-proofing your timber sash windows is a smart investment that saves money on energy bills while improving home comfort and efficiency without ruining the historic aesthetic of your beloved home or building.