Knowing Your Shed’s Foundations: 3 Parts of a Shed Floor

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Building a shed is an excellent way to add more space to your home without spending on a costly extension. Since it’s an outdoor installation on your lawn, you generally have more freedom on its scope and design. However, building something from the ground up can be a lot more complex than simply dividing your home’s interiors. A major aspect you need to consider is the need for a durable and stable surface to protect the integrity of your outdoor structure.

Understanding the three key elements of a shed floor

Before you can worry about soundproofing, ventilation, or even its wall paint, you need to figure out the foundation of building a shed. A shed floor has three key elements that ensure a durable and stable surface: the floor support, floor deck, and floor covering. Understanding these three parts will allow you to make better decisions on building a strong, rigid outdoor structure.

In this article, we’ll do a rundown of the three elements that make up a shed floor.

1. Floor support

There are generally two kinds of floor supports: bearers and floor joists. Bearers have limited spanning capacity since it utilizes small section timbers supported on a level surface made from purpose-built concrete or timber sub-floor. On the other hand, floor joists are much larger section timbers, forming 4×2 or 6×2 planks between supports on strip or pier foundations.

Although both support types are valid for any shed, you need to choose which one matches your personal preferences. Most homeowners usually go for a cheaper cost for their overall project. Bearers are more efficient for outdoor surfaces that already have a flat foundation. Regardless, both types of support must receive pressure treatment to increase their resistance to external variables like decay from weathering and deterioration from insect damage.

2. Floor deck

The deck comprises the flat surface you’ll walk on, which should be durable enough to hold the weight of the equipment or furnishing you’ll install in your shed. You can stick with the wooden theme of your shed and utilize pressure-treated plywood for your shed floor. This allows you to have durable and stable flooring, especially if you’ll install heavy machinery or gardening tools in your shed.

On the other hand, tongue and grooved planks can give some texture and durability to your shed, especially against potential water damage. Since they’re pressure treated to exposure class 3, they can resist occasional dampness during harsh weather conditions.

3. Floor covering

Unlike the previous two components, the floor covering is the most straightforward and does little to affect the structural integrity of your shed. However, it’s still crucial to purchase quality flooring material to match your shed’s purpose. If you’ll be working with liquids like paint and water for an outdoor hobby room, it might be better to choose anti-slip flooring. This ensures your safety from slips and falls when handling liquid substances.


Before undertaking a new home project, it’s important to know all the ins and outs of what you’re about to do. Without the right information, all the time you spend and the material you use can be wasted. This is why it’s vital to get as much data as possible, especially when doing a DIY project like building a shed.

Going in a home project blind can cause accidents, construction mistakes, and a considerable waste of your time. At Shed Mechanics, we host an extensive catalog of resources where you can get shed foundation plans to guide you on your DIY project. Browse our site for shed reviews and get access to shed plans today!