Expert: Bill DeShawn - 2/29/2004

Question
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When inserting a window in a home with 8-foot ceilings the default "Head Height" is 6'8".  I am drawing a home with 10 and 12-foot ceilings.  My question is: To what head height should I change the head height to?  My guess is 8'8" and 10'8", respectively.   Is this correct?

Thanks in advance for your expertise.

Eddie G.


Answer
All though this is not specifically an AutoCAD question, I will answer based on my architectural drafting experience.  When choosing a window header height, you must consider a few things, not just plate height, but also roof pitch, overhang and whether or not there is a closed soffit at the eaves.  As a general rule of thumb, the window in its entirety (not necessarily the window trim) should be completely visible in the elevation view.  The plate heights you depict are maximum plate heights and can vary.  Usually variations are in 12" increments, but in special circumstances can be another distance.  You are describing heights that are approx. 16 inches down from plate or rafter seat depending on type of framing.  Your guess is correct if referring to maximum header height.  But also take into consideration overhang and pitch of roof.  This could have an effect on how much of the window is visible.  Make sure your elevations are drawn correctly especially with respect to the relationship between the plate line and the top of fascia.

For the record, the firm for which I work sets plate height 14" down from plate resulting in 6'-10" window header height for 8" clgs.  However, I have seen other firms drawings that show plate height at 6'-8".  I'm not sure why the difference exists between firms.  Just an observation.

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