These Laws are many, relative to the small number of Biblical Verses spent explaining them: Chagigah 11a
Creation of the Roof
Where the structure was created naturally, not by humans: Succah 20b-21b
Dimensions of the Roof
Minimum area, to communicate impurity: Eruvin 10b Annuling a gap in a roof, based on its surrounding area, and including the gap's space toward the measurement of the entire roof: Eruvin 10b
Idiosyncratic Rooves
Communication of impurity through a roof, if part of it is underneath a skylight which is more than a Tefach [Hand-Breadth] wide: Shabbat 157a-b; Succah 18a
Considering wet vegetation, which would qualify as Bitter Herbs of Pesach Night, to be a structure: Succah 13b
Communication of impurity via a multi-layered roof, where some areas are only covered by one of the multiple layers: Succah 22a-b
The Space Beneath the Roof
Considering a structure to be "destroyed" if it is filled with dust or straw, and one does not intend to remove said items: Eruvin 78b-79a; Succah 4a
The minimum size of the structure, to communicate the impurity throughout its space: Succah 10a
