Why Cheap Firewood Ends Up Costing More

At face value, cheap firewood looks like a smart saving. Lower price per net. Lower upfront spend. Immediate availability.

But when you analyse it properly, in terms of moisture content, calorific value, appliance wear, and seasonal consumption — low-grade logs often become the most expensive way to heat your home.

Here’s the breakdown:

1. You’re Often Paying for Water

The biggest difference between premium and cheap firewood is moisture content.

• Cheap logs: frequently 25–40% moisture

• Proper kiln-dried logs: below 20% (Ready to Burn compliant)

When wood contains excess moisture, the fire must first evaporate the water before it can produce usable heat.

That means:

• Lower room temperature

• Slower ignition

• More smoke

• Increased fuel consumption

You’re effectively buying water weight instead of heat energy.

2. Lower Heat Output = Higher Usage

Firewood performance is measured by calorific value — the amount of energy released during combustion.

Wet or low-density logs:

• Smoulder rather than burn cleanly

• Produce weak flames

• Fail to build a strong ember bed

• Require frequent refuelling

Over the course of a winter, households using substandard logs often burn significantly more volume to achieve the same comfort level.

Lower price per net/bag rarely equals lower cost per season.

3. Poor Combustion Increases Maintenance Costs

Burning wet or poorly processed wood increases:

• Creosote deposits

• Tar accumulation

• Soot build-up

• Chimney blockage risk

This leads to:

• More frequent chimney sweeping

• Reduced stove efficiency

• Glass blackening

• Potential chimney fire hazards

One additional chimney sweep can easily exceed the savings from buying cheaper logs.

4. Inconsistent Log Size & Quality

Budget firewood often suffers from:

• Oversized logs that don’t fit properly

• Irregular splitting

• Mixed species with unpredictable performance

• Poor stacking density (less wood per bag than advertised)

This inconsistency reduces burn efficiency and increases frustration.

Premium suppliers process logs to:

• Consistent lengths

• Uniform splitting

• Controlled moisture content

• Reliable volume measurement

Consistency equals efficiency.

5. The False Economy of “Bulk Bargains”

Cheap bulk loads can appear impressive in volume but often contain:

• Unseasoned cores

• Mixed offcuts

• Lower-density softwoods sold as mixed hardwood

• Inflated loose stacked measurements

When measured by burn time per cubic metre, the value gap narrows — and often reverses.

The true metric is not price per load. It’s cost per hour of usable heat.

6. Legal & Environmental Considerations

In England, small quantities of firewood must comply with Ready to Burn regulations (below 20% moisture).

Non-compliant wood:

• Produces higher particulate emissions

• Contributes to air pollution

• May affect appliance warranties

Cheap firewood frequently fails moisture standards.

Properly dried logs burn:

• Cleaner

• Hotter

• More efficiently

• With fewer emissions

7. A Practical Comparison

Upfront price is only part of the equation.

The Real Cost Over Winter

If you rely on a log burner regularly, consider:

• Extra logs required per evening

• Increased chimney servicing

• Higher stove wear

• Reduced efficiency

• Time spent relighting weak fires

When you calculate these factors over 5/6 months, premium fuel almost always works out cheaper in real terms.

Final Thoughts

Cheap firewood can look like a saving at checkout.

But when you evaluate:

• Energy efficiency

• Appliance longevity

• Maintenance frequency

• Seasonal consumption

It becomes clear that quality fuel is an investment, not an expense.

If you depend on your stove for warmth and comfort, the cheapest option is rarely the most economical one.