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Wall section // wood shingle siding // above vertical board siding // 3/4″ rigid insulation // wood furring

Siding joints are a break in an otherwise continuous surface. When the siding types are different thicknesses, outside and inside corners are created that require extra attention. When one of the materials is brick, this detail gets even trickier.

It's tough to find sustainably harvested wood shingles these days. But if you do, it is the installation details that determine the “greenness” of this cladding, based simply on how long they last.

When harvested sustainably and installed to handle moisture, any type of wood wall cladding can be consider truly deep green.

In general, exterior above-grade walls should have continuous air, water, and thermal barriers.

Installing rigid insulation as the exterior sheathing can accomplish all of these tasks, but you need to account for shear resistance (provide wall bracing) in other ways, and you must provide special details if you expect the foam sheathing to perform as a water-resistive barrier (WRB).

A double-stud wall insulated with dense-packed cellulose is an excellent thermal barrier; however, double-stud walls still need at least one additional air barrier to limit air leakage through the cellulose.

Check out theadvanced framingsection of Construction Detail Library for alternative techniques to achieve shear resistance, and check outUsing Rigid Foam As a Water-Resistive Barrierfor more information on walls without housewrap.

For more information on air barriers, seeQuestions and Answers About Air Barriers

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