If one puts up the scach of the sukkah before building the walls then the sukkah is pasul (See Rama OC Siman 635 Sif 1.) If however a tefach of a wall is put up next to the scach (somach to the scach) before the scach is put up then the Rema says it's permitted to add the scach afterwards then finish off the walls. What about if the tefach of the wall was put at the bottom of where the sukkah would be. Do we say "gud asik" in this case and look at it as if the tefach is "somach" (next) to where the scach is?

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    The rama doesn't say it's pasul, only not to do it. The achronim argue if it is pasul bedieved.
    – Double AA
    Oct 25, 2012 at 16:17
  • @DoubleAA fair enough the M"B brings the Bach as the machshir however many achronim are cholek (See Sharei Tzion.) Al col panim the Rema definitely says "don't do it".
    – Yehoshua
    Oct 25, 2012 at 16:31
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    Perhaps the answer is simple that we don't say gud asik unless the wall is 10 tefachim high however this I still need to find the makor for.
    – Yehoshua
    Oct 25, 2012 at 23:08
  • How else would you build a gud asik suka? Build and break the walls?
    – JNF
    Nov 4, 2012 at 10:45
  • Is a tefach wall a chatzitzah d'minkara?
    – DonielF
    Oct 11, 2016 at 13:47

1 Answer 1


The Dirshu Mishna Berura quotes R' Elyashiv ZT"L that even if the tefach is on the ground the Succah is kosher. (mishna Berura 635 s"k 11 #8)

  • Thanks for the source-citing answer, Yonah, and welcome to Mi Yodeya! I hope you stick around and enjoy the site.
    – msh210
    Oct 10, 2016 at 15:51
  • Thanks for this answer, Yonah. I will need to go find the sefer in a local shul and look it up inside. However until then maybe you can tell us if there is any reasoning provided there or is it just a statement in the name of R' Eliyashuv that it would be good (without any reason given?)
    – Yehoshua
    Oct 12, 2016 at 16:18

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