楼顶做防水的施工步骤：
Construction steps of waterproof roof:
1、首先查明漏水原因，一般情况估计还是沉降，楼顶本是现浇的，房屋的沉降把它弄裂了，有缝，雨水就下屋里来了。
1. First of all, find out the cause of water leakage. Generally, it is estimated that it is still settlement. The roof was originally cast-in-situ. The settlement of the house cracked it and there were cracks, and the rain came into the house.
2、补缝，顶楼漏水大部分是缝隙裂开，需用补漏膏把缝隙填平，等干后进行下一步。（如果缝小于1MM不需要补漏膏）盖土网 防寒布 麻绳 油麻绳 麻刀 沥青麻绳 静压造型线 自动浇注机 铸铁拍门 钢制拍门 玻璃钢拍门
2. Repair joints. Most of the water leakage in the top floor is crack. Fill the gap with leakage repair paste and go to the next step after it is dry（ If the seam is less than 1mm, no leakage sealant is required)
3、用水性防水涂料或墙渗宝透明防水材料涂刷两遍，全面的，如果光涂缝隙也要宽带达到20厘米以上。这样确保粘结力。防水涂料都是渗入粘结的，弹性好，所以使用年限长。
3. The water-based waterproof coating or transparent waterproof material for wall seepage shall be applied twice, which shall be comprehensive. If the light coating gap is also wide enough to reach more than 20cm. This ensures adhesion. Waterproof coatings are infiltrated and bonded, with good elasticity, so they have a long service life.