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Storing wood pellets properly: What you should consider when storing pellets outdoors or indoors

Wood pellets are made from biomass materials such as sawdust, grass, alfalfa, rice husks, cereal straw, waste paper, and so on. During the production process, the biomass materials are formed into solid pellets with high density and the lignin is melted so that it binds the biomass materials together. Wood pellets are characterized by small size, high density, high purity, high heating value, cleanliness, low cost, easy storage and transportation. Nowadays, they are used as fuel in heating stoves, furnaces and power generation. How you should store wood pellets properly, you will learn below.

How long can you store pellets?

How long can you store pellets?

Normally, wood pellets are packed in plastic bags or paper bags. These cannot completely separate the pellets from the air. The moisture in the air moistens the wood pellets and makes them loose. Therefore, the storage time of wood pellets is determined by the humidity of the environment. The moisture content of pellets can be divided into 2 levels. If it is higher than 10%, the storage time is less than 3 months. If the moisture content is lower than 10%, the storage time is more than 6 months.

Improper storage may cause the pellets to become damp and crack, which will reduce their quality and burning efficiency and lead to economic losses. So we need to learn how to store wood pellets properly.

Note the following: Since wood pellets are easily damaged by moisture, fire and other environmental factors, it is recommended not to store too many pellets than you need. It is enough to store wood pellets for 1 month.

Proper storage of wood pellets

How to store wood pellets properly

Storing wood pellets does not have to be difficult. You just need to know what conditions are best to protect the material and make it last as long as possible. You’ll get the best protection if you use a pellet storage container that excludes environmental factors like pests and water. If you need to store your pellets in their original packaging, stack the bags in alternating directions. This trick ensures that the pressure on each bag is equal, and prevents moisture from accumulating between bags by allowing air to flow through.

Indoor storage of wood pellets

Indoor storage of pellets

Indoor pellet storage is the best way to safely store your pellets if the conditions are right. A shed, garage, or basement is a great place for storage because the wood pellets are out of the way there, but still accessible. However, make sure these indoor spaces are suitable for wood pellet storage.

Some basements are prone to flooding or moisture, and if that’s the case for you, you should find another place to store your pellets. However, don’t give up hope if the basement is your only option. You can use a dehumidifier and store the wood pellet bags on shelves or in another location off the floor.

Use other storage locations to your advantage if you have them. If you have space in your garage or a shed, that might be the perfect place to store your wood pellets. You should keep your containers or bags sealed, even if you cover them – this will help keep pests out.

Caution: It has been reported that stored bags of pellets can release both carbon monoxide (CO) and carbon dioxide (CO2), especially when stored in a warm environment. Make sure your storage area is well ventilated, install a CO detector and watch for the symptoms of CO poisoning – headaches, dizziness and nausea.

Store wood pellets properly: outdoor pellet storage.

How to store wood pellets properly - outdoor pellet storage


Storing wood pellets outdoors is more problematic due to environmental factors, but it’s a convenient way to store pellets if you don’t have space indoors. When storing wood pellets outdoors, make sure you store them:

  • In an airtight container: plastic or metal tank, silo;
  • in concrete or plastic tanks (underground storage in the garden);
  • covered from rain;
  • not on the ground.

Even though your tanks should be sealed, you don’t want to risk water getting in and ruining your pellets.

Useful wood pellet storage tips.

Useful tips for pellets storage

Keep the following in mind when storing your wood pellets indoors or outdoors:

  • Don’t store near heat sources: it’s no surprise that wood pellets are flammable – after all, you light them to use them. Therefore, it’s only logical that you shouldn’t store wood pellets indoors or outdoors near heat sources to avoid a dangerous situation. Do not store them near your grill, fireplace or any other heat source in your home.

Proper storage of wood pellets - Tips


  • Store new pellets separately from old ones: Separate old pellets so you know to use them first instead of mixing them with the new material.
  • Handle them carefully: Wood pellets are durable, but they can break or chip if handled too roughly. This will cause excessive dust and render some of your material unusable. Use caution when retrieving pellets from storage.
  • Make sure all ventilation guidelines and fire safety requirements are met.