Housing Defects

The form of pitched roofs

Lean Roof Maximum Span

The simplest form of pitched roof is the lean-to or monopitch roof that is commonly found above many rear extensions of Victorian houses. It can also be found as the roof form on a great number of housing estates built since 1960. Originally such roofs were constructed on site from individual timbers but the modern version is normally formed with trusses and often has an extremely low pitch 17.5 degrees or less . A lean-to roof can only span a short distance but a simple double pitch or couple...