A balloon ridge is a rounded or inflated ridge construction on top of a roof. It refers to a finishing element of the roof ridge that is wider or thicker than a standard ridge, often used as a decorative feature.
Function and application
The balloon ridge is placed at the ridge of the roof, the highest point where two roof surfaces meet. Unlike a standard ridge tile, which is relatively flat and functional, the balloon ridge has a distinctive bulging or swollen shape. This construction primarily serves as a decorative element while simultaneously providing protection against water ingress at the roof ridge.
Balloon ridges are most commonly found on historic buildings, churches, manor houses, and listed properties. They give the roof a richer and more stately appearance. In modern construction they are less common, but they are still used in restoration projects and new builds designed in a traditional style.
Materials
Balloon ridges are typically made from fired clay, just like regular roof tiles and ridge tiles. On monumental buildings, they may also be crafted from natural stone or lead. The choice of material depends on the architectural style, the period in which the building was constructed, and the rest of the roofing.
Installation and fixing
The balloon ridge is secured to the roof ridge using mortar or modern mechanical fixing systems. Correct installation is essential to prevent leaks. On older roofs, it is advisable to periodically inspect the ridge construction for cracks and deteriorating mortar.
Related terms
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