Glass block window in shower
Greetings. As part of a shower renovation, i'm planning on installing a glass block window (2'x 3.5'- 8x8x4 blocks) which will include cutting and framing an opening in a concrete block wall. I figure on cutting with a diamond blade (4.5" blade in a grinder - both sides of wall) and busting out the hole, but my confusion arises with the framing/sizing of the opening. As far as concrete is concerned, what materials/techniques used to frame out(structural header and trimmers) the opening for a window this size. Pressure treated wood bucks for header/jambs? Expansion joints between blocks and jambs or just mortar them directly to wood jambs?Also blurry about 'forming in' the opening outside as the exterior finish is concrete stucco look. I figure attach lathe to wood bucks and form the opening and sill right up to the glass block. Any help appreciated. Thanks in advance.