Exclusively made by The Original Box Sash Window Company in natural or colour-coded timber, SASHSEAL™ blocks draughts and damp air from outside, and stops noise and dust penetration.

The combination of specific control strips is fitted by our experts quickly and effectively. SASHSEAL™ has the added benefit of assisting the sashes to slide more easily than before. We always also fit new cords and adjust the weights.

The illustrations below show typical character windows and doors where our SASHSEAL™ has been used, maintaining the original appearance.

Note: "SASHSEAL™ is the Registered Trade Mark of The Original Box Sash Window Co. For clarity, the SASHSEAL's™ have been highlighted in red on the illustration.

To view the product technical specifications, CLICK HERE

Is it effective ? Dependent on the tightness of the perimeter air-seal, draughts can be 95% eliminated. Is the air-seal un-obtrusive ? You can’t really see it without close up inspection.

Will the window/door be hard to open ? It should make sliding windows easy to move and hinged windows firmer to shut. What other benefits are there ? Noise and dust will be eliminated to a great point. How long does it take to fit ? The surveyor can give you an approximation, but we need to start the installation on site before we know for certain. Every house, every window/door is different. CLICK HERE.

What’s the cost ?

It depends on many factors, for example:

The size and type of the windows/doors that you would like to replace.

The level of service you choose.

The age of your house, and if there are obstacles to overcome by our installers, e.g. structural.

Our surveyor can provide you with a no obligation Best Advice Report and Quotation. To do that he will need to visit the property and go through things with you. This will take an hour or two, depending on the complexity. CLICK HERE.

Will it help to maintain the value of my house ?

Period and character houses hold their prices better than modern ones. In today’s market, keeping up maintenance in a profession way, and re-placing modern features with ones authentic to the original design, is the way to maximise value.