Moisture can cause mould and mildew inside your hive.
As a result a pitched lid is the perfect way to go if you are trying to avoid these problems.
The height of this lid also helps with better ventilation for your hive.
It is important to also run the lid with a inner lid cover. This keeps the bees out of the lid and building in it.

Paint inisde and out for the best long life out of timber.

Made from NZ Radiata Pine