Frustrated with the lack of inexpensive options, yet with a pressing need to have a vacuum chamber, the author pursued his own design and construction – with impressive results. In this article, he shares his experience on how to build a vacuum chamber with readily available materials and components, and easy-to-follow instructions. What is a vacuum chamber? A vacuum chamber is a unit that removes the air within an airtight space. It’s essentially a form of pressure treatment, whereby wood can be saturated liquid-state treatments. If, in our example, a porous material is submerged in a liquid, the low pressure forces the liquid into the porous material top replace the removed air. Then the liquid sets within to add strength and density to the material. Why do you need a vacuum chamber? For those unfamiliar with the concept of stabilising wood, or perhaps why we might want to do so,