What are seasoned logs?
Seasoned logs are pieces of firewood that have been allowed to dry naturally over time. Freshly cut wood contains a considerable amount of water, so it must be split, stacked and exposed to sufficient airflow before it can burn efficiently.
The word “seasoned” describes the drying process rather than guaranteeing a particular moisture content. Correctly seasoned firewood may be dry enough to burn, but poorly stored logs can remain damp or absorb moisture again. The most reliable way to check is with a moisture meter.
If you want firewood that has already been dried, quality checked and prepared for immediate use, explore our kiln-dried logs.
What does seasoned wood mean?
Seasoned wood is wood that has been dried gradually through exposure to moving air. For firewood, the logs are normally split and stored off the ground beneath a cover that protects them from rain while leaving the sides open.
This process allows moisture inside the wood to escape. Depending on the species, log size, time of year and storage conditions, seasoning can take anywhere from several months to two years or more.
Seasoned wood should not be confused with wood that merely looks old. A weathered or grey exterior does not prove that the centre of a log is dry enough to burn.
Why does firewood need to be seasoned?
Burning wet or inadequately seasoned wood wastes energy because part of the fire’s heat is used to evaporate water from the logs.
Properly dried firewood offers several advantages:
- It is easier to light.
- More of its energy is converted into useful heat.
- It produces less smoke than wet wood.
- It is less likely to leave excessive deposits in the stove, flue or chimney.
- It provides a more predictable and enjoyable fire.
Wood species also influence heat output and burn time. Our guide to the best wood for burning explains how popular firewood species compare.
What moisture content should seasoned logs have?
The term “seasoned” does not guarantee that firewood has reached a particular moisture level. Moisture must be measured rather than assumed.
| Type of firewood | Typical condition | Suitability for immediate burning |
|---|---|---|
| Fresh or green wood | High and variable moisture content | Requires further drying |
| Part-seasoned wood | Some moisture has escaped, but the centre may remain wet | Test before burning |
| Properly dried firewood | Moisture content of 20% or less | Suitable for burning when stored correctly |
| Ready to Burn certified wood | Independently certified at 20% moisture or less | Prepared for immediate domestic use |
For the most useful reading, split a representative log and test the freshly exposed inner face with a moisture meter. Check several logs from different parts of the stack rather than relying on one reading.
How can you tell if logs are seasoned?
Drying logs often develop recognisable characteristics, including:
- Cracks or splits across the ends
- Lower weight than freshly cut wood
- Loose or peeling bark
- A clearer sound when two logs are struck together
- A faded or greyish exterior
These are useful clues, but none provides a guaranteed moisture reading. Logs can appear dry outside while retaining considerably more moisture internally.
For a reliable test, follow our guide explaining how to tell if firewood is ready to burn.
How do you season logs?
Logs season most effectively when they are split to expose more surface area, raised above damp ground and stacked where air can circulate freely. The top of the stack should be protected from rain, but enclosing every side can restrict ventilation and trap moisture.
The required drying time varies considerably. Dense hardwoods, large logs and firewood stored in a shaded or poorly ventilated location will generally take longer to dry.
For step-by-step instructions covering splitting, stacking, ventilation and drying times, read our complete guide to seasoning firewood.
Seasoned logs vs kiln-dried logs
Seasoned and kiln-dried logs are both dried to remove moisture, but the process and final consistency can differ.
| Feature | Seasoned logs | Kiln-dried logs |
|---|---|---|
| Drying method | Dried naturally using time and airflow | Dried under controlled kiln conditions |
| Drying time | Usually several months or longer | Considerably faster and controlled |
| Moisture consistency | Varies with storage, climate and seasoning time | Generally more consistent |
| Testing required | Moisture should be checked before burning | Check the individual product specification |
| Convenience | May require further drying | Usually supplied ready for immediate use |
Properly seasoned wood can burn very well if its moisture content has reached 20% or less. However, kiln-dried logs provide greater consistency and remove the need to season a supply at home.
See our detailed comparison of seasoned and kiln-dried logs if you are deciding which option is right for you.
Are seasoned logs Ready to Burn?
Not necessarily. “Seasoned” describes how wood has been dried, whereas Ready to Burn is a certification confirming that the fuel meets a defined moisture standard.
In England, firewood sold in volumes of less than two cubic metres must be Ready to Burn certified, confirming a moisture content of 20% or less. Seasoned wood can qualify if it meets the requirements and is properly certified; certification is not restricted to kiln-dried wood. You can read the official GOV.UK guidance on selling wood for domestic use.
FirewoodFund’s Ready to Burn logs are kiln dried, quality checked and suitable for customers who want a convenient supply without waiting for logs to season at home.
How should seasoned logs be stored?
Even well-seasoned logs can absorb moisture again when stored incorrectly.
Keep your firewood:
- Raised above the ground
- Protected from direct rainfall
- Open at the sides for ventilation
- Away from damp walls
- Loosely and securely stacked
- Separate from freshly cut wood
A purpose-built log store is ideal. A shed may also work if it is dry and sufficiently ventilated. Avoid completely wrapping a log stack in impermeable plastic, as this can trap condensation.
Choosing firewood that is ready to use
Seasoning your own logs can work well when you have sufficient time, space and suitable storage. If you want reliable firewood without waiting months for it to dry, kiln-dried logs offer a more convenient alternative.
FirewoodFund supplies British and European-sourced kiln-dried logs, depending on the individual product. Our range includes small bags, boxes, bulk bags, pallets and log crates, allowing you to choose a quantity that suits your available storage and how frequently you light your fire.
Browse our kiln-dried logs for home delivery and check each product page for its exact species, quantity, provenance and delivery information.
For every FirewoodFund order, money is donated towards tree planting in the UK.
Frequently asked questions about seasoned logs
How long does it take to season logs?
Seasoning can take anywhere from several months to two years or longer. The time required depends on the wood species, log size, local weather, airflow and storage arrangement. Moisture testing is more reliable than relying on time alone.
What moisture content should seasoned firewood have?
Firewood should have a moisture content of 20% or less before it is burned. Test the inside of a freshly split log with a moisture meter for the most representative reading.
Can seasoned logs still be wet?
Yes. Logs may have been left to season without sufficient airflow or protection from rain. Previously dry firewood can also reabsorb moisture when stored in damp conditions.
Are seasoned logs better than kiln-dried logs?
Properly seasoned logs can burn effectively when they contain 20% moisture or less. Kiln-dried logs are generally more consistent and convenient because the drying process takes place under controlled conditions.
Does FirewoodFund sell seasoned logs?
FirewoodFund specialises in kiln-dried firewood rather than logs that require further seasoning. Our logs are supplied at less than 20% moisture and are intended to be ready for use when stored correctly.
Learn More: Log Quality, Certification & Readiness Guide