Balloon framing is a timber frame construction method where the studs run continuously from the foundation to the roofline, spanning multiple storeys. This technique was developed in the 19th century in North America.
Origin and history
Balloon framing originated around 1830 in the United States, when industrialisation made machine-sawn lumber and mass-produced nails widely available. Thanks to these innovations, buildings could be erected faster and more cheaply than with traditional timber joinery. The method played a key role in the rapid urbanisation of the American Midwest.
Construction method
In balloon framing, the vertical studs run uninterrupted from the sill plate to the roof plate. The floor joists of intermediate storeys are attached to the sides of these continuous studs using ledger boards or ribbons. This differs fundamentally from platform framing, where each storey is built separately and the studs are only one storey high.
Advantages and disadvantages
A significant advantage of balloon framing is the minimal vertical shrinkage, since the timber runs continuously over the full height. This makes the method particularly suitable for facades with render or masonry cladding.
The biggest disadvantage concerns fire safety. The continuous cavities between the studs act like a chimney and can spread fire rapidly from the ground floor to the attic. For this reason, balloon framing has largely been replaced by platform framing, which creates fire barriers at each storey level.
Modern use
In contemporary construction, balloon framing is rarely used. It is mainly encountered in the restoration of historic buildings and in specific applications where minimal vertical shrinkage is required.
Related terms
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