Allex Posted July 5 Share Posted July 5 I have been given a measurement of 800mm to cut an opening in the outside leaf of the wall. What should the measurement be for cutting the inside leaf of the wall? PS I think it should be 820mm (10mmeach side over). Thanks. Link to comment Share on other sites More sharing options...
DevilDamo Posted July 26 Share Posted July 26 That will be quite a narrow door. On the assumption it’s brick, can you not achieve 910mm on the outside? You’d do the same on the inside and then finished reveals with plaster or plasterboard. Link to comment Share on other sites More sharing options...
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