About Chimney Sheep™
When I moved into my Victorian terraced house, I did two things. I opened up a couple of chimneys, and went about the place blocking draughts. I soon realised that I had created a massive hole through which all my warm air was being sucked out. While stuffing old clothes in to stop the heat escaping, I couldn't help but think that there had to be an easier way.
In the meantime, I knew farmers who had barns full of wool they couldn't give away, and an idea was born....I had heard about the insulation properties of wool, and that it was naturally fire retardant. I tried stuffing handfuls of the stuff up my chimney, but it just fell out. After a bit more pondering, I realised I had to learn how to make felt. Don't you just love the internet? And the amount of time people are prepared to put into making free instructional videos. Pretty soon I had worked out how to make thick felt discs of wool, and to my great satisfaction, they wedged into the chimney flue just as I had envisaged.
The next thing was to think about a handle. This evolved from a piece of bamboo with a threaded bar wedged in the end to kitchen utensil handles with a threaded bar welded on. I finally had a prototype to show the world! I showed it to some helpful people at Lancaster University, who set me on the path of plastic handle with clamp mechanism. This went through several stages of evolution to the design that has finally been tried and tested and found to work.
Friends and family with open fireplaces all received Chimney Sheeps for Christmas and birthday presents, and a patent application was lodged.
Although it is low-tech, the wool had to be the right degree of squashiness, the handle had to be easy to use, extendable and fire retardant, and the wool head had to be the right size to fit as many chimneys as possible without being too complicated. Going from some hand made prototypes to a product that could be made commercially took a while. But, at last, here it is: the Chimney Sheep™ ready willing and able to insulate chimneys across the nation!