typical framing is 2x4 nominal (1.5" x 3.5" actual) wood studs. Plus sheetrock @ 1/2" inside and sheathing plus any shearwall outside (1/2" to 1.5" total). In colder climates it might be 2x6 for better insulation, or it might have rigid insulation over the framing (typically 1 or 2"). Assuming a vinyl window frame you can safely assume the glazing would be at least 2" inside of the outer face of the wall exterior finish. Your rendering shows a window trim piece. That typically might be constructed from 3/4" cement board or 1.5" lumber. That trim piece is obviously beyond the finished surface of the exterior wall.
hope that helps.
archiboyMember Since 21 Jan 2010
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