A.Will Beemer, co-executive director of the Timber Framers Guild in Becket, Mass., responds: You are proposing an infill system, as opposed to the usual enclosure system, which wraps the entire structure with insulating panels. Traditional infill systems used materials such as adobe or wattle-and-daub. You are probably planning to build stud walls covered with stucco between the posts of the timber frame. Unfortunately, the finishing details where this infill meets the timbers would prove daunting.

Your proposal could work, but the success of the system would depend on a number of conditions: You must be located in an arid climate; you must use dry timbers; and you must be meticulous about caulking. In a mild, dry climate, such as that of the arid Southwest, you would not have the moisture migration and condensation problems we do in the...

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