A sealed building (no openings) contains a corpse. Is someone touching the roof of the building impure?
Halacha 1: A sealed building with a corpse is treated like a closed grave and imparts impurity from all sides, including the roof and back walls.
Question 2
A building has five locked doors and a corpse inside. The family decides to remove the corpse through the east door. What happens to the other four doors?
Halacha 2: Designating one opening for the corpse's removal saves all the other locked openings — only the designated exit and the area in front of it is impure.
Question 3
What is the minimum amount of airspace above a corpse for a grave to impart impurity from all surroundings?
Halacha 4: A grave imparts impurity from all surroundings only when there is a space of one handbreadth by one handbreadth at a height of one handbreadth above the corpse.
Question 4
An olive of flesh is buried in a pile of stones without a cubic handbreadth of airspace. Are vessels placed at the sides of the pile impure?
Halacha 5: Flush (retzutzah) impurity without a cubic handbreadth of space only imparts impurity directly above and below — vessels at the sides of the pile are pure.
Question 5
When flush impurity is embedded in a wall and a sukkah is built against that wall, is the sukkah impure?
Halacha 7: When impurity is flush in a wall and a sukkah is built against it, the wall becomes part of the tent's sides. Once there is a roof, everything in the ohel becomes impure.