Mishnah Negaim 13:2: A cornerstone, when he removes it, is removed in its entirety, but when he destroys [the house], he destroys what belongs to him but leaves what belongs to his neighbor. We find a stringency in the case of removal beyond that of demolition. Rabbi Elazar says, a house built with a cross-beam and a king-beam, if it appeared on the cross-beam he must remove it all, if it appeared on the king-beam, he removes what belongs to him but leaves what belongs to his neighbor.

הָאֶבֶן שֶׁבַּזָּוִית, בִּזְמַן שֶׁהוּא חוֹלֵץ, חוֹלֵץ אֶת כֻּלּוֹ. וּבִזְמַן שֶׁהוּא נוֹתֵץ, נוֹתֵץ אֶת שֶׁלּוֹ וּמַנִּיחַ אֶת שֶׁל חֲבֵרוֹ. נִמְצָא חֹמֶר בַּחֲלִיצָה מִבַּנְּתִיצָה. רַבִּי אֶלְעָזָר אוֹמֵר, בַּיִת הַבָּנוּי רֹאשׁ וּפִתִּין, נִרְאָה בָרֹאשׁ, נוֹטֵל אֶת כֻּלּוֹ. נִרְאָה בַפִּתִּין, נוֹטֵל אֶת שֶׁלּוֹ וּמַנִּיחַ אֶת שֶׁל חֲבֵרוֹ:

Mishnah Negaim 13:3: A house upon which a Nega appeared that had an attic on top of it, the beams are considered part of the attic. If it appeared in the attic, the beams are considered part of the house. If there was no attic on top of it, its stones, wood and dirt are destroyed with it, but it saves the frames and the window lattices. Rabbi Yehuda says the frame built on top of it is destroyed with it. Its stones, wood, and dirt, make it impure with [the size of] an olive. Rabbi Elazar Chisma says, in whatever size they are.

בַּיִת שֶׁנִּרְאָה בוֹ נֶגַע, הָיְתָה עֲלִיָּה עַל גַּבָּיו, נוֹתֵן אֶת הַקּוֹרוֹת לָעֲלִיָּה. נִרְאָה בָעֲלִיָּה, נוֹתֵן אֶת הַקּוֹרוֹת לַבָּיִת. לֹא הָיְתָה עֲלִיָּה עַל גַּבָּיו, אֲבָנָיו וְעֵצָיו וַעֲפָרוֹ נִתָּצִין עִמּוֹ. וּמַצִּיל עַל הַמַּלְבְּנִים, וְעַל שְׂרִיגֵי הַחַלּוֹנוֹת. רַבִּי יְהוּדָה אוֹמֵר, מַלְבֵּן הַבָּנוּי עַל גַּבָּיו, נִתָּץ עִמּוֹ. אֲבָנָיו וְעֵצָיו וַעֲפָרוֹ מְטַמְּאִין בְּכַזַּיִת, רַבִּי אֶלְעָזָר חִסְמָא אוֹמֵר, בְּמַה שֶּׁהֵן: