Graphical Construction Glossary >> Roofs and roofing. >> scotch valley

scotch valley

A method of constructing a variation to a rectangular plan without the use of valley rafters. Also known as a blind valley or a California valley in the US

A Blind Valley

• The blind valley is far superior to the standard traditional framed valley using valley rafters, creeper and jacks in one critical area. STRENGTH. I can not imagine a structural engineer even contemplating a traditional design.
• It is the only way to go when adding an extension to an existing building. It leaves the existing rafters in place.

• A "California valley" has one main drawback. It requires a wall or a beam across the "neck of the TEE" to support the main rafters, so it can not be used for an open cathedral type (no ceiling) type of roof.

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Adam Smith 1723-1790

"When we build, let us think that we build for ever."John Ruskin 1819-1900