We have an extra large sukkah. We purchased actual palm fronds which we used for our schach. Over yontif, the palms seemed to have shrunk because they have dried-out some. We are now noticing that some larger holes and areas where too much sky is showing. Can we add additional/new schach to the original schach during chol ha moed Sukkot?
You definitely can add schach, especially if the holes are if the holes are large, then you should.