Yes; we derive this prohibition from the the word "basuccos" written in the verse "You shall dwell in succahs for seven days". Since the letter "vav" is missing, thus indicating only one succah, our chazal have taught that we see from this that there is a prohibition to make a succah under another succah. Likewise we derive from here that there is a prohibition to make a succah under a tree or in a house.2. What would the halachah be if the succah was not directly under the tree, but the branches of the tree were overhead along the side of the succah, preventing the sun from entering the succah?
As long as the branches are not directly above the succah, even if they entirely prevent the sun from entering the succah it would still be kosher.3. What would the halachah be in a case where a succah is located under a tree which, through its branches and leaves, prevents the majority of the sunshine from entering the succah?
In such a case the succah would be invalid for use. This halachah would apply even if the succah was covered with enough s'chach to be able in its own right to prevent the majority of the sunshine from entering.Next Chapter