26/09/2026
🔥 The most expensive habit in wood heating isn't the cost of wood—it's the "overnight burn."
When you choke the air supply to stretch a fire through the night, you aren't just slowing the burn; you're turning your stove into a factory that converts firewood into tar and stores it in your chimney.
Here is what every wood stove owner needs to know:
🪵 What is Creosote?
It’s not just soot or dirt. Creosote is unburned wood gas that cools down and condenses inside your cold flue (when temperatures drop below 120°C). Over time, it builds up in three stages:
💡Stage 1: Flaky grey ash (easy to sweep).
💡Stage 2: Crunchy black buildup mixed with tar.
💡Stage 3: A hard, shiny glaze that standard brushes can't move—requiring expensive specialized removal.
⚠️ The Danger Zone
Just 1/8 inch of buildup (about the thickness of a £1 coin) is enough to ignite a chimney fire. These fires can exceed 1,000°C, cracking clay liners and ruining stainless steel. Many run slow, quiet, and starved of air—destroying your liner without you ever realizing it.
💡 How to Stop It:
Keep wood under 20% moisture: Don't guess by the bark—use a cheap moisture meter.
Never let a fire smolder: Build smaller, hotter fires and keep the air control open.
Upgrade if needed: If you must have overnight heat, an insulated stainless steel liner keeps flue gases hot enough to vent safely without condensing.
Remember: Smoldering fires don't save money—they just move fuel above your ceiling. Burn hot, burn dry, and keep your home safe!
