The best foundation for a plastic shed depends on several factors, including the size and weight of the shed, the climate, and the type of ground on which it will be placed.
When installing a plastic shed, it’s important to make sure that the foundation is strong enough to support the weight of the shed.
This may require a reinforced concrete slab, a heavy-duty gravel base, or a combination of both in the case of large and heavy plastic sheds, depending on the weight of the shed and the conditions of the site.
For small to average-sized plastic sheds, a gravel foundation works great and is a much cheaper and simpler option.
Gravel provides a hard, stable surface for a plastic shed, and also filters out possible water accumulation.
The weight of a plastic shed can vary greatly depending on its size, design, and features. Plastic sheds can range from a few hundred pounds for smaller, simpler designs to several thousand pounds for larger, more elaborate sheds.
Can you put a plastic shed directly on the ground?
It is possible to place a plastic shed directly on the ground, but this may not be the best option in all cases. The soil under the shed can shift and settle over time, which can unlevel the shed and cause some structural damage.
A flat, firm foundation is required because plastic sheds are usually built in pieces, also known as panels or sections. The panels are usually made of molded plastic and are designed to fit together like a jigsaw puzzle to form the walls, roof, and floor of the shed. The panels are held together by interlocking systems.
If there are differential settlements in the ground or foundation where you place your plastic shed, this will cause some pieces to come loose and consequently damage the structure.
It is important to install the shed on a solid, level foundation that provides good drainage, such as a concrete slab or gravel base.
If you are placing the shed directly on the ground, it is important to make sure the ground is level and free of standing water, and to consider installing a moisture barrier, such as plastic sheeting, to prevent moisture damage.
And while plastic may be moisture resistant, you should also think about the massive amount of moisture that will accumulate inside the shed if you don’t have a foundation that offers some type of filtration or protection against moisture seepage.
What problems can be caused by placing a plastic shed directly on the ground without a foundation?
Apart from the problem with uneven terrain and settlements mentioned above, placing a plastic shed directly on the ground without a foundation can cause several problems, including:
Moisture problems: plastic sheds are not designed to be in direct contact with the ground, which can lead to moisture problems. Moisture can seep into the plastic and cause it to warp or crack over time, causing structural damage and compromising the integrity of the shed.
Pest infestations: Placing a plastic shed directly on the ground can also make it more susceptible to pest infestations such as ants, termites, and rodents. These pests can damage the plastic and weaken the overall structure of the shed.
Wear and tear: Direct contact with the ground can also increase wear and tear on the shed. This can cause it to deteriorate more quickly, reducing its service life.
How to make a gravel foundation for a plastic shed?
For a foundation for a plastic shed, it is recommended to use 3/4 inch crushed gravel. This type of gravel is ideal for foundations because it is durable, compactable, and free-draining, which helps to prevent moisture from seeping into the shed and causing damage.
Crushed gravel is made from rocks that have been crushed into small pieces. The 3/4 inch size is a good choice for a foundation because it provides a stable base that is not too large, which can create pockets for water to collect, or too small, which can shift or settle over time.
In addition to 3/4 inch crushed gravel, other types of gravel, such as pea gravel or larger river rock, can also be used for foundations.
However, these types of gravel are not as compactable as crushed gravel and may not provide as stable a base, so it is important to consider the specific requirements and conditions of your shed when choosing a type of gravel for your foundation.
Determine the size and location of the shed: Measure the area where you want to place the shed and mark its perimeter with stakes or spray paint.
- Clear the area: Remove any grass, rocks, or debris from the area within the marked perimeter.
- Level the ground: Use a shovel or a grading rake to level the ground as much as possible. If the ground is not level, you may need to remove or add soil to create a level surface.
- Install a moisture barrier: If you want to prevent moisture from seeping into the shed, place a sheet of heavy-duty plastic or landscape fabric over the entire area within the marked perimeter.
- Add a layer of gravel: Spread a layer of 3/4 inch crushed gravel over the moisture barrier. The gravel should be spread evenly and leveled to a depth of 4 to 6 inches.
- Compact the gravel: Use a hand tamper, a rented plate compactor, or a heavy object, such as a concrete block, to compact the gravel. This will help to prevent settling and ensure a stable base for the shed.
- Check for level: Use a level to make sure the gravel foundation is level in all directions. Adjust the gravel as needed to make sure it is level.
- Place the shed: Once the gravel foundation is level, you can place the plastic shed on top of the foundation. Make sure the shed is level and stable, and adjust the gravel as needed to make sure it remains level.
Can you put a plastic shed on the grass?
This is a similar case to put the shed directly on the ground.
Yes, you can place a plastic shed on the lawn, but it may not be the most stable or durable option for all of the reasons previously mentioned.
If you decide to place a plastic shed directly on the lawn, it is important to make sure the ground is level, free of rocks and roots, and has good drainage.
You may also consider installing a moisture barrier, such as plastic sheeting, to prevent moisture damage.
What damage can a plastic shed suffer when exposed to constant humidity?
A plastic shed that is exposed to constant humidity can suffer a variety of forms of damage. High humidity can lead to a buildup of moisture inside the shed, which can cause:
Warping: High humidity can cause the plastic to warp, which can result in structural damage and make it difficult to open and close the doors and windows.
Mold and mildew: Moisture inside the shed can lead to the growth of mold and mildew, which can cause unpleasant odors, discoloration, and potential health problems.
Corrosion: If the shed is made of metal components, such as hinges, screws, or brackets, high humidity can cause these components to corrode and become weakened or even fail.
Deformation: If the plastic panels are not designed to withstand high humidity, they can deform and lose their shape, making the shed look unsightly and potentially compromising its structural integrity.
Do plastic Sheds rot?
No, plastic sheds do not rot. Unlike wooden sheds, which are susceptible to rot, plastic sheds are made from durable, weather-resistant materials that do not rot or deteriorate over time.
This is one of the main advantages of plastic sheds, as they can provide a long-lasting, low-maintenance storage solution for outdoor equipment, tools, and other items.
However, it’s important to note that plastic sheds can be susceptible to other forms of damage, such as fading, warping, or cracking, if they are not properly cared for or if they are exposed to extreme weather conditions.
Remember also that although a plastic shed is not susceptible to rotting, it can usually contain metal parts such as bolts, metal reinforcements, and anchors.
Some plastic sheds may have metal vents to allow air circulation and reduce moisture buildup inside the shed and may have metal flashing or flashing on the roof to seal the joints between the walls and roof and prevent water from entering the shed.
All of these parts are very susceptible to rust and moisture damage.