# How much of a gap in schach is acceptable?

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
Commented Oct 13, 2014 at 15:29

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? Commented Oct 13, 2014 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. Commented Oct 14, 2014 at 2:15
• 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.
– MTL
Commented Oct 14, 2014 at 3:18
• judaism.stackexchange.com/q/47339/5323
– MTL
Commented Oct 14, 2014 at 15:50