A heavy edit is the most intensive form of copyediting I offer. Heavy copyedits incorporate everything included in a light copyedit and a medium copyedit but also involve cleaning up and rephrasing existing sentences (not writing additional content) as needed.
Heavy copyedits are for authors who are satisfied with the overall structure and content of their manuscripts but need help with phrasing. If you are new to writing or struggle with grammar and sentence structure, especially if English is not your first language, then you are likely looking for a heavy copyedit.
All heavy copyedits include two editing passes.