天(tian)(tian)(tian)溝(gou)(gou)是(shi)(shi)屋面(mian)排水系統中必備的(de)構件(jian)，天(tian)(tian)(tian)溝(gou)(gou)主(zhu)要(yao)是(shi)(shi)用(yong)來暫時(shi)收集雨水的(de)，通過落水管及(ji)(ji)時(shi)排走。盡量使用(yong)外(wai)掛天(tian)(tian)(tian)溝(gou)(gou)，體積小，而且也能當檐口飾(shi)(shi)邊。顏色相宜，安裝精致的(de)天(tian)(tian)(tian)溝(gou)(gou)及(ji)(ji)飾(shi)(shi)面(mian)疑給整個工程的(de)裝飾(shi)(shi)效(xiao)果增(zeng)色不少。

彩板(ban)天(tian)(tian)溝搭接處漏水處理：天(tian)(tian)溝板(ban)搭接100mm即(ji)可，搭接處采(cai)用(yong)鉚釘連接，假如要想保證天(tian)(tian)溝不漏水，那就用(yong)防(fang)水膠打(da)上。

詳細的(de)(de)做法是(shi)(shi)(shi)將彩(cai)板(ban)(ban)(ban)天溝搭(da)接，施以兩(liang)道(dao)中(zhong)性(xing)硅膠(不(bu)可使用(yong)酸性(xing)膠和堿性(xing)膠，與(yu)彩(cai)板(ban)(ban)(ban)的(de)(de)相容性(xing)和耐久性(xing)都有(you)題目)，封膠位置分(fen)別距相互搭(da)接的(de)(de)兩(liang)塊板(ban)(ban)(ban)邊沿(yan)10mm，并以兩(liang)道(dao)防水(shui)(shui)鉚(liu)釘固(gu)定搭(da)接部位。每道(dao)防水(shui)(shui)鉚(liu)釘中(zhong)央(yang)距為(wei)80mm，兩(liang)道(dao)相錯(cuo)分(fen)布，鉚(liu)釘應打在封膠線上。留意拉鉚(liu)釘應該(gai)是(shi)(shi)(shi)防水(shui)(shui)的(de)(de)，不(bu)應該(gai)用(yong)中(zhong)間是(shi)(shi)(shi)穿(chuan)透的(de)(de)拉鉚(liu)釘。經由這樣精(jing)心的(de)(de)施工還泛起漏水(shui)(shui)題目就有(you)可能是(shi)(shi)(shi)硅膠沒有(you)打滿;鉚(liu)釘銹(xiu)穿(chuan)；拉鉚(liu)釘處(chu)的(de)(de)彩(cai)鋼板(ban)(ban)(ban)鋼銹(xiu)穿(chuan)；硅膠失(shi)效(xiao)。硅膠失(shi)效(xiao)的(de)(de)主要(yao)原因是(shi)(shi)(shi)紫外線照(zhao)射導致高分(fen)子鏈斷(duan)裂，好的(de)(de)硅膠在鋼板(ban)(ban)(ban)間的(de)(de)壽命(ming)應該(gai)是(shi)(shi)(shi)很長的(de)(de)。