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Home and Garden

How to Build a Garden Chimney

If you have a small garden or patio with no space for an outdoor chimney, it doesn’t mean that you can’t have the smell and appearance of one. To create a chimney, you need to first build a structure that will house the smaller one. This is what we call a ‘garden chimney’. The word ‘chimney’ refers to a hollow structure that has been used for many centuries to extract smoke from fireplaces and furnaces. There are two types of garden chimneys – smearer and stack. A smearer is essentially an underground version of the same thing; the main difference is that it’s buried underground instead of on top of it. A stack is designed to stand above ground level and vent excess gases and smoke from burning fuels such as wood or coal. Let us explore more about how you can build your own garden chimney.



What You Will Need

Before you build a garden chimney, you need to start collecting the necessary materials. Firstly, you need to decide whether you want to go with a smearer or a stack. There are a few differences between the two, but they both essentially do the same thing. You will also need bricks, mortar and a plumber’s pipe long enough to run from your garden to the roof of your house. The chimney itself needs to be of a certain size in order to vent out toxins and smoke from the house. There are several standard chimney sizes, including 8, 10 and 12 inches. You will also need to decide what type of chimney you want – freestanding or tiled.


The Foundation

The garden chimney is essentially a large brick box built on concrete blocks. This forms the base of your structure. The sides of this box need to be thick enough to hold the weight of the bricks and mortar needed to build the chimney. If you are building a smearer, this brick box will be underground. If you are building a stack, you will want the brick box to sit at ground level with the bricks protruding above the ground. At the bottom of the box, you need to create a hole that is slightly larger than a plumber’s pipe. This will allow the gases to flow from the house to the garden.


The Bricks

The chimney is, obviously, made from bricks. The number of bricks you need depends on the size of your chimney and the length of the bricks. The width and length of the bricks will be determined by the type of chimney you want to build. If you’re building a smearer, you will need to purchase a type of brick designed for this purpose. If you are building a stack, you will want to purchase a type of brick that suits your architectural style and blends in with your home. If you want a classic look, you should go with traditional red bricks. Alternatively, you can use dark grey bricks to achieve a contemporary look. Garden chimneas


The Mortar

The mortar is the material that holds the bricks together. It is a mixture of cement, sand and water. The mortar needs to be able to withstand the weight of the bricks and the pressure of gases. The best mortar for the job is a type of cement called “reinforced”. This is a special type of cement that has a mesh inside it to add strength to the mortar.


Step 2: Building the Chimney

To build your garden chimney, start by placing a ring of bricks at the bottom of the box. This ring of bricks will be the base for the rest of the bricks in your chimney. Then, start building your chimney with bricks on top of the ring. Ensure that the bricks are aligned properly and that each layer is aligned with the one below it. For the mortar, you need to fill the gaps between the bricks with the cement. Ensure that the mortar is thick enough to hold the bricks together.


Step 3: Installing the Smoker and Firebox

The chimney doesn’t do any good unless you put a smoker and firebox on the top. The smoker and the firebox are what make the fumes and smoke from burning fuels go up the chimney. To install the smoker, start by drilling several holes in the top of the brick box. This will allow the gases to flow into the box. The smoker is simply a metal box that has holes in the front and back. To install the smoker, simply place it on top of the brick box and make sure that the holes line up with the holes you have drilled in the box. If you want to install a firebox, make sure that you have enough room inside the box for it.



A garden chimney is an excellent way to create the illusion of an outdoor fireplace without the added expense of a large brick structure. However, building a garden chimney is no small task. It’s a job that requires time, patience and the right materials. That being said, it’s a project that’s well worth doing. You can enjoy all the benefits of an outdoor fireplace without any of the drawbacks of indoor smoking. Now that you know how to build a garden chimney, you can enjoy the benefits of an outdoor fireplace all year round.

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