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 How To Draught Proof Your Home With New Windows

Replacement sash windows by Gowercroft Joinery

Unseen and blessedly unfelt – a revolutionary draft proofing system for sash windows

I will be honest I was not really interested in ‘just another replacement window company’ when I went to Grand Designs Live at Excel in London. I was looking for something new and innovative that would wow our blog readers. Like our Tree Tent article or the write up on LoftZone products in previous posts

However then I met David Brown on the Gowercroft Joinery stand. He was so earnestly enthusiastic about his products, that he prompted me to spend more time talking to him, and by the end of our conversation he had officially proved himself to be The Window Specialist.

Accoya Timber Treatment

We initially started the conversation discussing the merits of Accoya timber. This is a non-toxic method of treating timber to resist weather damage, by treating the wood with ascetic acid to create a durable and stable surface.

Ascetic acid (also known as vinegar) makes the timber harder and more resistant to water. The process is similar to hardening conkers in vinegar. David joked that the treatment process means that his workshop smells of fish and chips. If you ever want to visit them in North Derbyshire he will be pleased to give you the tour, but I am guessing you will feel hungry as you wander around.

How To fit Sash Windows without the drafts

Not only does David’s company sell traditional wooden windows and sliding sash replacement windows, he also has a solution for completely draft proofing your home by fitting a window with his new Sash Sealer system. So if you are thinking of fitting a window but you believe that you can only avoid drafts by getting rid of your existing sash windows for the dreaded UPVc, then think again.

Although David was enthusiastic about his Accoya Timber, what he really wanted to show me was the SashSealer, this is Gowercroft’s answer to draughty sash windows. It is a truth universally acknowledged that if you want the aesthetic features of sash windows then you have to put up with a draught. However if the display model on the stand was anything to go by, Gowercraft may have found the solution. They certainly have the test results to back up their assertions.

Proving the system works

Gowercoft have been granted a patent for the SashSealer and they chose Grand Designs Live to launch it to market, visit their website to find out more about it. David is understandably proud of the product. He explains tests by the British Standards Institute showed performances equivalent to casement windows. He says “our sliding sash windows now exceeds Class 4 Air Permeability standards”.

It is an entirely invisible system and it does not alter the way the mechanism works so it can be used in conservation and heritage areas. It can be installed on all types of sash windows including spiral balanced or weighted sash windows whether double hung, single hung or fixed configurations.

So I left the stand reminding myself that sometimes the most effective building systems are unseen once they have been installed.

Quick Fix Remedies

If your renovation doesn’t run to a replacement sash window and you need to know how to referb a sash, you can learn how to replace a sash cord or how to paint a sash window in the DIY Doctor Projects section or visit our forum for help and advice on all sorts of Do It Yourself and Home Improvement problems such as repairing rotten sash windows


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