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How large of a gap is allowed in a sukkah's schach (roof) without invalidating it? (in tefachim and inches/feet, if possible)

Would it make a difference if the gap was in the middle of the roof, or on the side (=next to the wall) [דופן עקומה]?

Related question: How much invalid material invalidates schach?

  • QS"A Yalqut Yosef, Orahh Hayim 632:2 – Lee Oct 13 '14 at 15:29
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Sukka 17a Mishnah:

הרחיק את הסיכוך מן הדפנות שלשה טפחים פסולה בית שנפחת וסיכך על גביו אם יש מן הכותל לסיכוך ארבע אמות פסולה

If the s'chach is distanced more than 3 handsbreadths from the walls then it is invalid. If the roof caved, and you put schach into the breach, if there are more than 4 cubits from the wall then it is invalid.

If there is airspace, you have 3 handsbreadths. If there is invalid schach material, then you have 4 cubits from the wall.

S.A. 632:2

אויר בין בגדולה בין בקטנה שוים דבין באמצע בין מן הצד בשלשה טפחים פסולה בפחות משלשה כשרה ומצטרף להשלים הסוכה ואין ישנים תחתיו

Airspace, whether in the middle or on the side, invalidates at 3 tefachim. At less than 3, it counts to complete the Sukkah but you shouldn't sleep under it.

Rama:

ודוקא שהולך על פני כל הסוכה

[It only cannot be slept under] if it spans the length of the Sukkah.

  • What about invalid material in the middle? – Double AA Oct 13 '14 at 16:59
  • @DoubleAA It wasn't asked about so I didn't include it. If anyone looks up my sources, it's the end of that same Rama - 4 tefachim. – Y     e     z Oct 14 '14 at 2:15
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    But +1, nice answer. I like MY halacha answers that start at the mishna or gemara and end with SA/Rama -- gives a nice, complete picture. – Shokhet Oct 14 '14 at 3:18

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