The answer to 'sod thin grass' is that thin or patchy grass is often caused by a variety of factors, including poor soil conditions, lack of sunlight, improper mowing, or pest infestations. The symptoms include thinning, yellowing, or bare spots in the lawn.
To address thin grass, you can try overseeding the affected areas, improving soil quality by adding compost or fertilizer, adjusting your mowing height and frequency, and addressing any pest or disease issues. However, if the problem persists or covers a large area, it's best to consult a professional landscaper who can diagnose the root cause and recommend the appropriate solution, which may involve re-sodding or re-seeding the entire lawn.