I wish to open a masonry wall in a walkout basement. The wall was formerly the outside wall of the (brick and block) house; a small addition was later added and I wish to open an access into this addition at the basement level.
The wall continues up to the roof of the original house--two additional stories plus attic gable. I want to cut an opening perhaps 6.5 feet high and 8 feet wide in the basement level of this wall. (BTW, the support beam on which the 1st-floor joists rest is parallel to the wall-to-be-removed and is not over the area to be cut. It won't be an issue, as far as I know.)
I will be seeking a professional to do the work, but seek feedback beforehand. Is this easily doable? Does it require a steel header be placed at the top of the opening? Would a wood header do?
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