Schach

area under invalid Schach sometimes counts to achieve minimum sukkah size yet that area may not be used for sleeping, compared to mud in a mikveh which counts towards minimum mikveh size yet may not immerse in the mud itself

bent wall, when area between valid Schach and wall is covered by invalid Schach of less than four amos

converting a roof of boards into Schach for a sukkah

handles on Schach which if it was food would render it susceptible to impurity, is the Schach susceptible to impurity?

mats, various types, valid as Schach? susceptible to impurity?

roof of sukkah made of spits and utensils with gaps the same size or bigger which can be filled with proper Schach

Schach above or below ten tefachim or twenty amos, material valid as Schach hanging below Schach or on floor changes halachic height?

Schach made of boards, smoothed boards, boards made into utensils, width or length of sukkah

Schach made of bundles of straw, wood, cane

Schach made of vines, attached, later disattached, shaken, susceptible to impurity, from an item that grew from the ground, slats arrow shafts, flax, ropes, sources

Schach more than three tefachim from wall, invalid Schach of more than four amos between valid Schach and wall, gap of no Schach three tefachim wide across middle of sukkah, sleeping under a gap of less than three tefachim

Schach which extends beyond the walls of the sukkah, considered part of the sukkah?

sheet spread above the Schach, below the Schach, above a bed, on the walls, as a small tent within the sukkah

sukkah higher than twenty amos, platform inside sukkah less than twenty amos to the Schach

walls of sukkah can be made for material which is susceptible to impurity, and material not valid for roof Schach

walls with gaps of more or less than three tefachim from the ground, walls ten tefachim high, Schach more than three tefachim from the wall, halacha of sukkah walls compared to halacha of partitions and carrying on Shabbos