What is the minimum size of a blemish required to render a house impure?
Halacha 1: house tzara'at requires a minimum of two grisim — width of 6 hairs and length of 12 hairs, placed side by side (rectangular). All measures are halachot from Sinai.
Question 2
A scholar sees what he is certain is a tzara'at blemish on a house. What should he tell the priest?
Halacha 4 states: even a sage who knows with certainty must speak tentatively — 'it appears to me as a blemish' — allowing the priest to order the house emptied before the formal declaration, preserving the contents from impurity.
Question 3
Can a house in Jerusalem contract house tzara'at?
Halacha 11 states: Jerusalem and the Diaspora are not susceptible to house blemishes, derived from 'in a house in the land of your ancestral heritage' — Jerusalem was not apportioned to any tribe.
Question 4
How many stone walls minimum must a house have to contract tzara'at?
Halacha 6: a house must have four walls built on the ground with stones, earth, and wood. If it has three walls or five walls, it is not susceptible. Additionally, it must have at least 8 stones — 2 per wall.
Question 5
Is a synagogue susceptible to house tzara'at?
Halacha 14 states: a synagogue or house of study that has a dwelling for attendants or students is susceptible to house tzara'at blemishes.