וַיִּ֤בֶן אֶת־היצוע [הַיָּצִ֙יעַ֙] עַל־כָּל־הַבַּ֔יִת חָמֵ֥שׁ אַמּ֖וֹת קֽוֹמָת֑וֹ וַיֶּאֱחֹ֥ז אֶת־הַבַּ֖יִת בַּעֲצֵ֥י אֲרָזִֽים׃ (פ)
他靠著整座殿建了側屋，每層高五肘；又用香柏木覆蓋了殿。
Rashi
Five amohs high. Of each one. Therefore, their total height was fifteen amohs besides the thickness of the ceiling.
Rashi
And he covered the Beis Hamikdosh. That is the upper covering of the roof, and the covering [=והספון] mentioned above that was the ceiling of the upper story.