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　　導致(zhi)彩鋼房屋面漏水的因素很多，有(you)時候(hou)是多因素共(gong)同作用導致(zhi)的，歸(gui)結(jie)起來主(zhu)要有(you)設計因素、使用維護因素三項。   

　　設計因素   

　　結(jie)(jie)(jie)構剛度(du)小：結(jie)(jie)(jie)構與普通(tong)結(jie)(jie)(jie)構的(de)(de)不同之(zhi)處，在于其允許(xu)結(jie)(jie)(jie)構產生較大的(de)(de)變形，主要體現在梁的(de)(de)撓度(du)，從而導(dao)致漏(lou)(lou)水更(geng)加嚴重，另一方面(mian)(mian)柱頂側移太(tai)大，會導(dao)致屋面(mian)(mian)板(ban)的(de)(de)連(lian)接部(bu)位發生錯們現象，從而引發漏(lou)(lou)水，漏(lou)(lou)水的(de)(de)部(bu)位很難確定(ding)，并且可能改變，所以(yi)維修(xiu)十分(fen)困難，針對這(zhe)些情況，設(she)計之(zhi)初應綜合考慮結(jie)(jie)(jie)構變形、屋面(mian)(mian)坡度(du)和屋面(mian)(mian)板(ban)選型因素(su)的(de)(de)影(ying)響，排除漏(lou)(lou)水隱患。   

　　坡度(du)過小(xiao)：在實際(ji)設計(ji)工程(cheng)中(zhong)，建設單位(wei)為節省資金或感官造型原因要求盡量減(jian)小(xiao)屋(wu)(wu)(wu)面(mian)坡度(du)，而設計(ji)單位(wei)往往生(sheng)搬硬套規(gui)定，不了解當地(di)降雨量的(de)實際(ji)情(qing)況，于是(shi)很多工程(cheng)屋(wu)(wu)(wu)面(mian)坡度(du)過小(xiao)，屋(wu)(wu)(wu)面(mian)雨水排泄不暢從而使得(de)屋(wu)(wu)(wu)面(mian)積水，造成屋(wu)(wu)(wu)面(mian)滲漏(lou)現象的(de)發生(sheng)。   

　　板(ban)(ban)(ban)型(xing)選(xuan)(xuan)取(qu)不當(dang)(dang)；對于暗(an)(an)扣(kou)式(shi)和咬合式(shi)的板(ban)(ban)(ban)型(xing)，由于屋(wu)(wu)(wu)(wu)(wu)面(mian)板(ban)(ban)(ban)板(ban)(ban)(ban)肋較(jiao)高(gao)(gao)且(qie)不漏(lou)螺釘，排水比較(jiao)通(tong)暢(chang)，一(yi)般(ban)適(shi)用(yong)于屋(wu)(wu)(wu)(wu)(wu)面(mian)坡(po)(po)度比較(jiao)平(ping)緩的屋(wu)(wu)(wu)(wu)(wu)面(mian)，通(tong)常屋(wu)(wu)(wu)(wu)(wu)面(mian)坡(po)(po)度為1：20左右，最小坡(po)(po)度可(ke)以(yi)做到(dao)1：40。而搭(da)接(jie)(jie)式(shi)彩(cai)鋼壓型(xing)板(ban)(ban)(ban)一(yi)般(ban)板(ban)(ban)(ban)肋較(jiao)低，且(qie)螺釘外露，當(dang)(dang)屋(wu)(wu)(wu)(wu)(wu)面(mian)水波在(zai)風力(li)(li)作用(yong)下(xia)漫過(guo)波峰時，極易(yi)通(tong)過(guo)板(ban)(ban)(ban)縫(feng)和釘孔造成滲漏(lou)，所以(yi)一(yi)般(ban)用(yong)于屋(wu)(wu)(wu)(wu)(wu)面(mian)坡(po)(po)度較(jiao)陡(dou)的屋(wu)(wu)(wu)(wu)(wu)面(mian)。常見(jian)的屋(wu)(wu)(wu)(wu)(wu)面(mian)坡(po)(po)度在(zai)1：10左右且(qie)單坡(po)(po)長度不超過(guo)15mm。屋(wu)(wu)(wu)(wu)(wu)面(mian)板(ban)(ban)(ban)材型(xing)號要根據泄水坡(po)(po)度、坡(po)(po)長合理選(xuan)(xuan)擇，坡(po)(po)度小、坡(po)(po)長長的屋(wu)(wu)(wu)(wu)(wu)面(mian)應盡量選(xuan)(xuan)用(yong)波高(gao)(gao)較(jiao)高(gao)(gao)的暗(an)(an)扣(kou)式(shi)或咬口(kou)(kou)式(shi)板(ban)(ban)(ban)型(xing)。在(zai)風力(li)(li)較(jiao)大的地區應盡量采用(yong)暗(an)(an)扣(kou)式(shi)或咬口(kou)(kou)式(shi)板(ban)(ban)(ban)型(xing)，因為搭(da)接(jie)(jie)式(shi)板(ban)(ban)(ban)在(zai)風力(li)(li)作用(yong)下(xia)板(ban)(ban)(ban)縫(feng)容易(yi)被掀開或發生(sheng)變形，加劇滲漏(lou)。   

　　排水組織(zhi)不到位   

　　內(nei)天(tian)(tian)溝設(she)計(ji)缺陷：許多工程實(shi)例表明，內(nei)天(tian)(tian)溝兩側(ce)漏水(shui)是發生最為普遍的問題，因而在排(pai)水(shui)組織設(she)計(ji)時應優先選擇自(zi)由排(pai)水(shui)或是外天(tian)(tian)溝排(pai)水(shui)，盡(jin)量避免(mian)采用內(nei)天(tian)(tian)溝。內(nei)天(tian)(tian)溝兩側(ce)漏水(shui)的主要原(yuan)因有天(tian)(tian)溝截面(mian)過(guo)小，厚度過(guo)薄、缺少(shao)溢(yi)流(liu)設(she)計(ji)。天(tian)(tian)溝的大小應通(tong)過(guo)計(ji)算屋面(mian)排(pai)水(shui)量確(que)定。   

　　落(luo)水(shui)口(kou)太小：落(luo)水(shui)口(kou)太少時，天溝(gou)的(de)蓄水(shui)壓力(li)(li)較大。會(hui)造成天溝(gou)水(shui)通過與屋面(mian)板縫隙(xi)流入室內甚(shen)至(zhi)漫上屋面(mian)，造成事故(gu)；落(luo)水(shui)口(kou)的(de)數量和大小應依據(ju)屋面(mian)排水(shui)量和天溝(gou)蓄水(shui)能力(li)(li)綜合計算確定。