毡垫

zài ān zhuāng wǎ piàn qián yī céng fáng shuǐ de jìn yóu zhān diàn bèi zhuān mén ān zài wàng bǎn shang

在安装瓦片前，一层防水的浸油毡垫被专门安在望板上。

A water-resistant saturated felt underlayment is typically rolled out over the sheathing before the shingles are applied.