I need to punch a door opening between my garage and my utility room, it is a 4" concrete wall with 2x4 studs on both sides and 3/8" drywall. This makes the total width of the wall almost 12 inches. Do I frame the door like a normal interior door?
In other words, do I knock out the concrete block all the way to the ceiling and then frame in the header and then put 2x12s above the header to the top plate? or do I leave a section of concrete block above? Logic tells me better to knock it out all the way so I can construct the support better?
The other question is should I do something different with a wall this thick? It has to be this thick due to the amount of rigid electrical conduits, plumbing and water supply lines that goes onto both sides of the wall.
Thanks in advance,
MC