Double glazing can crack. While this is uncommon as double glazing is durable and strong, certain factors can cause it to crack. A double glazed window is a sealed unit. Thus, the pressure within it is constant, in contrast with the air pressure on the other side of the glass. Hence, the glass remains under constant, albeit very mild pressure. Most times, the glass is strong enough to withstand this pressure. However, in some cases it isn’t and stress cracks can occur.
The most common time for a double glazed window to crack is during the colder months. The outdoor temperature is low, and as a result, the indoor temperature is much higher. Both indoor and outdoor heat plays a role in the cracking of double glazing. While the strength of the heat directed at the window does not cause the cracking to occur, it is here on the window that it is targeted. When the sun rises and its rays begin to land on the window, the chilled glass meets the more temperate sunlight. The centre of the pane of glass can warm quicker than the corners. This in turn places strain on the glass. If the strain proves to be too much, the glass can crack.
Internal heat also plays a role in cracks in double glazing. In winter, the inside temperatures are significantly higher than the outside temperatures. This can cause thermal shock which is when the glass experiences a drastic change in temperature and causes it to crack.
If your double glazing has cracked, it is best to have it repaired as soon as possible. A cracked window is not a thermally efficient window. On top of that, it can pose a security risk to the property.
We offer expert cracked double glazing repair at excellent prices. Our many years of experience ensures an excellent level of workmanship resulting in perfect cracked double glazing repair.