יט פֵּרַס עָלֶיהָ סָדִין מִפְּנֵי הַחַמָּה, אוֹ תַּחְתֶּיהָ מִפְּנֵי הַנְּשָׁר, כְּלוֹמַר שֶׁלֹּא יִהְיוּ עָלִין וְקִסְמִין נוֹשְׁרִים עַל שֻׁלְחָנוֹ, פְּסוּלָה; אֲבָל אִם לֹא פֵּרַס אֶלָּא לְנָאוֹתָהּ, כְּשֵׁרָה וְהוּא שֶׁיְּהֵא בְּתוֹךְ ד' לַסְכָךְ; וְיֵשׁ אוֹמְרִים שֶׁסֻכָּה שֶׁהִיא מְסֻכֶּכֶת כְּהִלְכָתָהּ וְיָרֵא שֶׁמָּא יִיבַשׁ הַסְכָךְ אוֹ יִשְּׁרוּ הֶעָלִין וְתִהְיֶה חַמָּתָהּ מְרֻבָּה מִצִּלָּתָהּ, וּפֵרַס עָלֶיהָ סָדִין שֶׁלֹּא תִּתְיַבֵּשׁ, אוֹ תַּחְתֶּיהָ שֶׁלֹּא יִשְּׁרוּ הֶעָלִין, כֵּיוָן שֶׁהַסָדִין גּוֹרֵם שֶׁעַל יָדוֹ צִלָּתָהּ מְרֻבָּה מֵחַמָּתָהּ, פְּסוּלָה; אֲבָל אִם לֹא כִּוֵּן בִּפְרִיסַת הַסָדִין אֶלָּא לְהָגֵן מִפְּנֵי הַחַמָּה וְהֶעָלִין, אוֹ לְנָאוֹתָהּ, כְּשֵׁרָה וּבִלְבַד שֶׁיְּהֵא בְּתוֹךְ אַרְבַּע לַסְכָךְ; וּמִיהוּ לְכַתְּחִלָּה לֹא יַעֲשֶׂה אֶלָּא אִם כֵּן הוּא נִכָּר לַכֹּל שֶׁמְּכַוֵּן כְּדֵי לְהָגֵן אוֹ שֶׁהוּא שָׁרוּי בְּמַיִם, שֶׁאָז נִכָּר לַכֹּל שֶׁאֵינוֹ שׁוֹטְחוֹ שָׁם אֶלָּא לִיבַשׁ.
19 If one spread a sheet over [the schach] due to the sun or under it due to the falling leaves — that is, so that leaves and shavings don't end up on the table — it is invalid. However, if it was only spread for decoration, it is valid, as long as it is within four [tefachim] of the schach. There are those who say that if a sukkah is properly schached and there is fear that it will the schach will dry out or leaves will fall and the sunlit area will be more than the shaded area, they spread a sheet over it so that it fall not dry out or under it so that the leaves will not fall, because the sheet ensures that the shade will be greater than the sun, it is invalid. However, if in spreading the sheet, the only intention was to protect from the sun or the leaves or to decorate, it is valid, as long as it is within four [tefachim] of the schach. However, preferably this should not be done unless it is obvious that the intention is to protect or it is soaked in water such that it is obvious to everyone that it is spread out to dry.