How do you detail the exterior of an "outie" window in a straw bale home?
We plan on building a "pretty good" straw bale home in Tucson AZ, and I'm trying to think my way through a window installation. I know that most straw bale builders shape/curve the inside of their window openings to let in more light, but I don't care for this. Not only is it a pain to stuff those curves and get plaster to stay on them, but I want thick window trim (craftsman bungalow style) which is sort of impossible with curved windows. So we plan on building plywood boxes for our rough openings. We DO plan on having wide windows (or banks of windows) to cut down on the cave-like feeling of narrow windows with 18" deep walls. So that's why we're using plywood boxes.
My question is: how do you detail an outie window in a straw bale home so that you can add exterior window trim, but if the windows ever need replacing, the plaster won't have to be ripped out?
Here's what I was thinking (see crude plan view drawing). Does this seem feasible? Would you rabbet the back of the 2 x 4/ plaster stop to fit over the nailing fin? Or would you attach the nailing fin TO the exterior plaster stop, and then trim over the nailing fin? No need for any J channel or brick moulding on the window, right? Are there other major issues I'm missing?
Thank you for your help, and for everything you do here at GBA!
ps. the drawing is not to scale and leaves out all kinds of stuff like flashing and air sealing and jamb extensions and the wire mesh for the bales etc. be nice.
Posted Thu, 09/05/2013 - 16:11
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