筒瓦為半圓筒形的,由筒型坯對剖製成,[1] 覆蓋在仰板瓦的交界處,構成筒瓦屋頂,靠近屋檐口的筒瓦為勾頭(宋代稱華頭筒瓦[2]),頂端粘掛有圓形瓦當

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北京四合院的筒瓦屋頂

中國宋代營造法式》規定,筒瓦共有六個品種,自六寸至二寸五分。清代普通筒瓦寬自四寸五分至二寸五分,琉璃筒瓦寬自六寸五分至三寸。[3]

筒瓦有羅鍋筒瓦、花脊筒瓦等形式。

註釋

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