Common Leakage Location and Solution of Colored Steel Plate
Coloured steel roofing is widely used in the construction field because of its many advantages, such as convenient construction, high utilization rate and so on, which are superior to concrete roofing. In recent years, colored steel roofs have been widely used in industrial buildings, commercial plazas, stadiums and aviation industries. However, due to the uneven manufacturing and installation levels of enterprises, the leakage of colored steel roof is particularly prominent, and waterproofing has become a difficult problem. In many years of construction practice, we found that the leakage of colored steel roof mainly occurred in the following parts:
一、Lateral and longitudinal overlap of metal plate and plate. Roof roof plate;
二、Fasteners;
三、Tiangou Falls, the junction of the Tiangou and the roof panel to and fro water;
四、High and low spans. Leakage of roof and wall panels, parapets and metal panels;
五、Leakage of protruding parts on metal roofs (e.g. outgoing pipes. fan outlets):
六、Leakage along the edge of daylighting zone;
七、Leakage around wall windows, etc.
Based on our experience, we discuss the causes of seepage with you.
1、 In the design process, the roof slope is too small, which causes the rainwater can not be discharged to the gutter in time, and causes the roof to accumulate water and the drainage is not smooth, resulting in the roof seepage:
2、There are no slopes in the transverse direction of the trench, unreasonable design of the trench nozzle, etc. When heavy rains occur, the trench accumulated water can not be discharged to the eaves of the trench to return water. When the trench is not in place for anticorrosion, the trench will be rusted and corroded, or garbage will block the water nozzle, which may cause leakage or return water:
3、During the installation and use of the house, the stamping on the roof results in the loosening of fasteners. The aging of fastener waterproof cushion causes leakage at fastener.
4、Opening holes in the roof panel, installing various fans, exhaust pipes and other cracks around the waterproof treatment is not good;
5、Because of the influence of external environment, wind load, snow load, thermal expansion and contraction, the roof slab deforms, resulting in the expansion of the gap at the overlap, destroying the original waterproof treatment and leaking water.
6、The unreasonable selection and aging of waterproof materials in the construction process and so on.
So what kind of waterproofing material should we choose and how to deal with the waterproofing problem of colored steel roof? First of all, we think that the choice of waterproofing material must be different from ordinary and conventional building waterproofing material. Metal roof is exposed outdoors for a long time. Natural conditions have a great impact on it, so waterproofing treatment must conform to the characteristics of metal buildings. Sex. Waterproof materials shall have the following properties:
A.The metal surface should have good bonding property and can not fall off.
B.Good elasticity and fracture-resistant tensile strength are required to accommodate all kinds of vibration and displacement of the roof.
C.Low temperature flexibility to ensure product performance at low temperature:
D.Have good weather resistance:
E.Anti-ultraviolet aging:
F.Have good breathability and breathability;
G.It should have good adaptability to various climates and wide temperature range to ensure the performance of products at high and low temperatures as well as the requirements of temperature difference or sudden cooling and sudden heating;
H.All kinds of abnormal parts should be seamlessly treated.
I.Safety, environmental protection, simple construction, etc.
At present, there are many kinds of waterproofing materials available in China, but most of them are waterproofing materials for concrete buildings, which can not meet the waterproofing requirements of colored steel roof. Through many years of construction practice, combined with the characteristics of metal buildings and water-proof requirements, we have introduced the advanced international technical formula and foreign raw material pure liquid, and developed a new type of waterproof material for colored steel roofing. This material has excellent waterproofing effect on coloured steel sheet roof, seamless treatment for various waterproofing parts of metal structure building, safe, environmental protection and simple construction, and truly perfectly and systematically solved various waterproofing problems on metal surface.