i would probably use the 3/4 just on the bottom where the vent is mounted..i would probably use something much lighter for the skin to save weight..it only really needs a backing for the stucco...
and frame with 2x4's, etc.
Originally Posted by DannyT
i owuld get the powerpack first so you know what you have to frame in for and what size ducting it needs. i wood make it out of 3/4 plywood for the most part. to stucco it get the mesh the stucco guys use with the metal mesh attatched and staple it to the plywood and stucco over it.