Average Exterior Wall Thickness at Exterior

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Average Exterior Wall Thickness. No code book is going to confirm a size for you. Walls within buildings that do not have interior support posts must be at least 4 inches (101 mm) thick.

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Stucco with screen is 1/2 to 3/4 inches thick. Interior & exterior sheathing should be ⅝” thick, each. The wall thickness will go up to 6 ¾”, if you use 2x6 wall studs.

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3 cavities are quite rare now because they struggle to take enough insulation. Typically, the wall thickness will be in the range 0.5 mm to 4 mm. Residential walls generally take either 1/2 or 5/8 drywall on one or both sides, so your wall thicknesses will vary on whether or not they are interior or. These are pretty cheap in comparison to many other building alternatives.