In most cases, a compost pile does not need a cover. ... A cover can limit airflow and water, interfering with the composting process. You should definitely cover finished compost. Otherwise, if it's exposed to the elements, the compost will break down further and lose nutrients as they leach into the surrounding soil.

Should I put a lid on my compost bin?

It is not essential for a compost heap to have a lid. However, a lid does help to regulate both the temperature and the moisture levels. You could easily use a piece of old carpet (preferably Hessian backed rather than foam backed) or a thick piece of plastic tarpaulin weighed down with stones.

Should a compost pile be in the sun or shade?

You can put your compost pile in the sun or in the shade, but putting it in the sun will hasten the composting process. Sun helps increase the temperature, so the bacteria and fungi work faster. This also means that your pile will dry out faster, especially in warm southern climates.