The two most common causes of cracked glass are impact & use.

Impact
Impact damage often comes as a result of force, such as:

• If you’ve overloaded the firebox with logs for fuel, you may have knocked the stove glass into a log protruding from the box, resulting in the glass cracking.
• Glass hit from the outside by a heavy object can also result in cracks.

Usage
Although woodburners are extremely sturdy due to the materials they are manufactured with, over-use can still end up damaging your stove.

• Burning household coal in the enclosed space of a woodburning stove can result in volatile mini-explosions, the force of which can crack the glass on your stove’s door.
• Overfiring can happen when the stove gets too hot, which in turn can crack the glass on the door of the stove.

Is it safe?
If you do not replace the glass of your woodburner, you run the risk of it completely shattering the next time you fire it – higher temperatures will almost always worsen a crack in glass.  This could have dangerous consequences for your home, so our team at DN Glass Co would recommend you have the glass replaced as soon as you notice a crack.