Summary and status quo of a traditional building finished Gutter Gutter finished pouring cement commonly used gutters drowning or drowning natural. b Ministry of Construction "building water supply and drainage design specifications" provides the building should be a separate storm sewer discharge, and the detailed structure of roofing construction made detailed requirements; only the roof gutter, gutters, the water inlet, water pan , Deformation and extending pipelines waterproof roof structure of each detail has a specific structure and size specifications, but also for the use and quality of waterproof material, there are stringent requirements. c difficulty directly determines the design and construction of the high cost of cement gutters, inefficient. Roofing waterproofing roofing project structure is most likely to leak weaknesses appear. Traditional water system issues a cement gutter design complexity, construction difficult, long duration and high cost. b traditional way overboard susceptible to corrosion of the wall, it will destroy the housing wall in the short term, affect the appearance. c prone to leakage, affect housing use functions, is the weakest link in the roofing project. d for the designer, the builder, property management, the user in terms of a relatively new type of headache for the water system is the basis of the requirements of a material design is the premise b c d construction is the key to safeguarding the environment should be simple e and coordination of the new water system Features a substitute materials: cement gutters / natural drowning → Cailv / Color / copper b Design: Complex → modular design specifications, product standardization c Construction: Construction → complex simple product installation d Maintenance: Maintenance Maintenance is simple and effective e → complex environment: the freedom to choose a single color → color, color combinations make the building itself and the environment seamless. UV resistant polyester coating metal water system 10 year warranty, and easy to repair aging metal and can not be repaired easily Cailv the water system performance test impact test dropped from a height 500mm diameter and 15mm mass of 500 g ball coating without stripping phenomenon bending test at room temperature 180 degree bend test coating by a hand press no peeling, no cracks base salt corrosion experiments were cross-cut with a cutter to just touch the aluminum plate until, under the conditions of 35 degrees, 5% 360 hours salt spray solution. Corrosion rust spread from the incision does not exceed 2mm acid etch test 10% HCL, CHCOOH, H2SO4 experiment 100 hours. No change in greenhouse experiments surface minus 50 degrees in the north and tropical heat insolation at 60 degrees using a stable condition, such as a color. Metal drowning alternative system? part of a downspout on the part of the cement substitute b PVC gutters replace the water inlet of the water system to replace the replacement c PVC downspout installation d Cailv comprehensive installation, color steel, copper fell into the water system. Building Materials Co., Ltd. Hangzhou Ruichen