ח אמר ר"נ אמר שמואל גג הסמוך לחצר חבירו עושה לו מעקה גבוה ד' אמות אבל בין גג לגג לא ור"נ דידיה אמר אינו זקוק לארבע אמות אבל זקוק למחיצת עשרה
8 The Master has just said: 'The one should make a parapet for half his roof and the other should make a parapet for half his roof, In such a way that the parapets do not face one another, though each should extend [his parapet a little beyond the middle].' Surely this rule is obvious? — We require it for the case where one of the owners builds a parapet first [without consulting the other]. You might think that in that case the other is' entitled to say to him: Complete the parapet and I will reimburse you.<span class="x" onmousemove="('comment',' Lit., 'take the expense.' [Heb. uzinka, a Persian word meaning 'cost', v. Krauss, TA. I, 20.] ');"><sup>12</sup></span> We, are therefore told [that he cannot insist upon this], since the other can say to him: Why don't you want to build? Because it might weaken your wall. I too [don't want] my wall to be weakened.