Points of attention for the installation and use of color coating board

install

The surface of the color coated board must not allow metal file chips, drilling chips, chips and other metal objects such as rivets and fasteners, because the metal residue will cause rust after erosion. These residues should be removed from the roof as soon as they are found, or at least after each day of construction. Avoid walking on it to avoid damaging the paint film. In strictly required situations, the building should be inspected within 2 weeks of installation to remove residual materials that may rust. Removing residue at this point will help maintain the appearance of the roof.

Peel film

Part of the color coated board is coated with a specially designed transparent organic film. Organic film can protect the color plate coating in the process of storage and transportation scratches, but need to be stripped immediately after the installation. Sunlight exposure will enhance the adhesion between the organic film and the surface of the color plate, so the color plate needs to be covered to avoid direct sunlight when placed on site.

cut

Cutting boards should be used whenever possible to avoid cutting on site. If you need to cut, you can use cutting tools such as straight shears, curved shears, saws and hand shears. All cutting work performed on the site shall not damage the steel plate coating or plating and shall keep the cutting edge in good condition. The cutting edge must be kept sharp to reduce burrs. When cutting, the surface of the plate is first kept facing up so that the burrs are on the back of the plate. Do not cut on the surface of other color coated boards. If power cutting or drilling is required, tape or rags should be applied around the drilling holes and near the incision to prevent hot chips from burning the coating. Avoid using tools such as grinding wheel cutting, hacksaw cutting or flame cutting to damage the plating and coating of the steel plate.

Auxiliary material matching

Copper, lead, graphite and unprotected steel plate shall not be used in direct contact with the color coated plate, and the loss of copper plate should be avoided to the steel plate. Color coated boards shall not be used in direct contact with wet or weathered wood and wet cement. The reasons are as follows: wood contains moisture, weathering treatment of corrosive chemicals will shorten the life of the color plate, the chemical treatment of wood loss caused corrosion, wet cement alkalinity high energy reaction with the steel plate coating.

Sandwich plate

Due to the electrochemical reaction, the lead and copper sandwich plate will accelerate the corrosion of aluminized zinc plate. Lead cannot be used as sandwich board with aluminized zinc plate, copper cannot be used as sandwich board with aluminized zinc plate and galvanized plate. The recommended materials for sandwich board are aluminized zinc substrate, aluminized zinc color plate and aluminum plate. Because of the short life of galvanized plate, should not be used as a sandwich plate and aluminum plated zinc color plate. Carbon free rubber and aluminum plant roofing panels - penetrating sandwich materials, such as exhaust ducts, can be used as sandwich panels with aluminum plated zinc steel.

Storage and transportation

Failure to take simple and basic preventive measures during storage and transportation may result in steel plate damage, delay and economic loss. Lift the bales on the line of center of gravity. When the crane is used, nylon straps and extension crossbars are used, and wire ropes cannot be used. When forklift trucks are used, the fork spacing must be greater than 5 feet. If the plate is more than 10 feet, two or more people need to lift one side to avoid sagging. The following measures should be taken during transportation and installation to avoid damage to the color coated plate. Wear clean, dry gloves when moving and installing steel plates. Do not drag steel plates over rough surfaces and steel plates. The steel plate should be placed on the cushion wood off the ground, tilted at an Angle to avoid water, and covered with rain cloth. Wet bales should be quickly isolated, wiped with clean gauze and stacked in a ventilated place until completely dry.

Backfill and foundation

Try to avoid backfilling the soil on the side of the aluminized zinc plate. When backfilling is necessary, the surface of the steel plate and the backfilling soil should be separated by an isolation film. Under ideal conditions, a fixed plate should be added to the installation of aluminum-zinc coated steel plate on the concrete foundation, and prevent the side of the aluminum-zinc plate and the direct contact with the plate. The fixed backing plate should be tilted at a certain Angle to avoid water and avoid drainage to the cutting edge of the aluminized zinc plate.

insulation

Under the color coated plate roof and wall is usually used for insulation of glass fiber felt, if the steel plate and fiber felt contact, will absorb moisture under film corrosion, especially near the fixed plate plate end and under the eaves of the color coated plate part prone to corrosion under film. Therefore, the insulation felt should be installed on the fixed plate to keep dry, to avoid the occurrence of capillarity phenomenon resulting in corrosion under the film. Similarly, if the insulation felt on the roof and upper wall is installed improperly, under the action of condensation and wind and rain, it will cause corrosion on the back of the steel plate. During the installation process, the insulation felt should be avoided from being continuously exposed to moisture. The correct installation method of the insulation felt of the roof board should seal all the sealing film joints and repair all the holes and other defects on the sealing film to avoid water seepage, because the water vapor condensation on the back of the roof board and the moisture absorption of the insulation film will cause corrosion under the film.

fastener

Fasteners: Because of the long life of roofing and wall panels made of painted panels, the life of fasteners should be consistent with that of painted panels and accessories. In contrast, fasteners account for a small proportion of building investment, poor selection of fasteners can not benefit, therefore, the important consideration of fastener selection is the long-term performance and beauty of the building. There is a wide range of fasteners to choose from, as well as fasteners made of various metal materials such as self-tapping and self-drilling types and non-carbon polymer gasket materials to meet steel plate fastening requirements. Fastener materials include carbon steel, 300 series and 400 series stainless steel and aluminum.

Having a fastening tool with a depth probe and an appropriate RPM speed will help prevent these problems and avoid the use of impact fastening tools.

Sealing agent: The general use of double circle or three circle type sealant on the roof panel joint part and accessories and other auxiliary materials bond. Sealants are also used for sandwich plates and auxiliary seals. The sealant shall be fully coated within the junction. The sealant coated on the surface of the steel plate will deteriorate due to ultraviolet (UV) irradiation. The manufacturer of roofing panels will provide detailed designs of sealants applied at plate overlaps, auxiliary and sandwich panels. Butyl synthetic rubber, polyurethane, acrylic and silicone can be used as sealants. Neutral silicone is recommended.

The acid silicone reacts with the steel plate to produce a caustic by-product with a vinegar taste. Polyurethane rubber (aliphatic urethanes) is recommended. Butyl synthetic rubber is suitable for no external exposure, such as in joints. It is recommended to use acrylic acid with solid content greater than 80%. Sealant manufacturers can specify different flexible, elastic, UV resistant and weather resistant sealant products.

Edging: A clipped edge exposes the substrate, coating, and coating to the environment, forming an electrochemical reaction zone to begin corrosion. The degree to which edging corrosion occurs depends on the thickness of the steel plate, the coating system, the environment, and the Angle of exposure i.e. vertical (wall panels) and inclined (roof panels).

Drip eave edge: Under the influence of rain and dew retention, the incision corrosion at the edge of drip eave edge is the most serious. The initial symptom of the incision corrosion is the appearance of tiny visible bubbles on the surface under the cut edge. With the passage of time, the bubbles spread to the entire cut edge. For some metal coating products, the bubbles expand at a fixed rate until "red rust" occurs on the surface near the cutting edge. The bubble expansion rate of color coating products decreases gradually with the increase of time, so the corrosion resistance of color coating products is better than that of ordinary coating products.

Side: It is recommended not to strip or long edge cutting for the color coating board, because the cutting part is completely exposed to the environment. The manufacturer of the building board should tailor the size of the color plate required for roller processing to avoid exposure. The edge of the full width color coated plate is protected by an aluminized zinc coating and a coating surround.

Roof panel panel and wall panel edge: Since no rain and condensation remain, this part of the corrosion is weaker than drip edge, should be used as far as possible to reduce the end cut edge exposure.

Fixed size cutting edge: in the doors and Windows also need to cut edge, outdoor cutting provisions in the wall around the use of clean, no burr edge wall panel, the use of decorative plate to protect the cutting edge, decorative plate cutting edge is also as far as possible to bend and fold processing so that the cutting edge hidden in the line of sight.

Design matters

Using a variety of joints, joints, ribs and fastening facilities and surface treatment, basically can achieve any desired design effect. In terms of design, color coated board can match and coordinate with many building materials such as concrete, wood and glass both in texture and style. The color coating board has high strength and light weight, which can achieve special effects that cannot be achieved by using other building materials. Light weight means low load, giving more free space for the selection of thin building elements. Color coating board is diverse in color, and stone, concrete, wood and other building materials combined with the selection of large, for the use of metal materials and painted construction projects, color coating board is conducive to cooperate with or add the required color.

(1) Roof: the good appearance and excellent performance of color coated board awaken the interest of architectural designers and homeowners to show the roof, the roof is no longer just to meet the function of wind and rain and need to have design characteristics. A roof system made of colored panels can add color to other architectural elements to achieve the effect of a wide range of changes in the spokes and joints of the roof panels. The roof slope of color-coated buildings is steeper, with a typical value of 3:12 or even higher, to facilitate the rapid drainage of rainwater. Small slope of the roof is not easy to see, usually choose aluminized zinc plate, for slope less than 1/4:12 roof, the use of aluminized zinc plate is more economic, it has been proved that after 20 years of use still maintain excellent performance. The roof panels are usually placed not directly on the purlin of the house but on the frame, which can be made of wood or steel. A 30-pound sheet of paper or similar material is usually placed between the roof panels and the supports. Part of the color-coated roof is designed in the form of direct contact with the roof structure. Roof panels are usually flat in shape and 10 to 24 feet wide. Small longitudinal ribs can be used to improve strength and shape. The steel plate is secured to the skeleton using either a penetrating steel fastener or a concealed clamp. Roof panels are stacked or welded lengthwise together. The welding methods are divided into batten type and snap-together type, and the batten type can be subdivided into traditional box type, cap type and whole type. Typical weld heights are about 3/4 to 2 inches. The roof panels welded by the occlusal and traditional box method are fastened to the skeleton by concealed clips or iron angles fixed on the weld, and the integral welded roof panels are fixed on the skeleton by iron hoops or concealed fasteners. Movable iron hoops and Angle design can prevent thermal expansion and contraction of roof panels.

(2) Wall: Building panel manufacturers can provide a wide range of different shapes of color painted wall panels, and the appearance of wall panels in all areas of the wide front can be completely consistent with the required architectural effect. High quality color cladding ensures consistent color and appearance throughout the project. Similarly, because the use of the same material minimizes the technical problems of connection and switching, parts (trimwork,stops,copings) that have a key impact on the overall design effect can be made of the same material, color and treatment of the large area cladding.

maintenance

The maintenance during service can extend the service life of the color coating board. Although factory pre-painted building panels last many years longer than normally painted panels, they still need to be cleaned thoroughly, and maintenance is not required in areas where rain washes automatically, such as roof panels. Cleaning can remove the accumulated corrosion and maintain the beautiful appearance of the building without painting. The places to be cleaned include support, drip eaves side panel, warehouse door panel, drip eaves back groove, etc.

(1) Cleaning: Usually, clean water can remove most of the dust and residue accumulated on the surface of the steel plate. In theory, sweeps should be required at least every six months, and more frequently on salt-spray coasts and in areas with heavy industrial dust. For stubborn stains that cannot be washed away, weak detergent or household ammonia can be used in the following ways. In any case, scrub a small, inconspicuous area to test before cleaning a large area. Dissolve one spoonful of Tide laundry detergent (or other detergent with less than 0.5% phosphate) in 5 gallons of hot water; Or dissolve a cup of household ammonia in 5 gallons of room temperature water. Do not mix ammonia with any bleach. Do not mix detergent and bleach by yourself. If washing and bleaching are required, use a detergent containing bleach. Using any of the above detergents, clean the surface of the steel plate from top to bottom with a soaked soft cloth, sponge, soft brush or low pressure nozzle to avoid wiping streaks and bright spots. It is recommended not to use stain removal powder or industrial detergents as they will damage the paint. Water-soluble detergents such as "Myo" are very effective and can be used. If fungus and mildew are present and cannot be removed by the above methods, a detergent containing bleach, such as "Tide" containing bleach is recommended. After washing the surface of the steel plate should be thoroughly removed detergent residue.

(2) Paint repair: If there are scratches in the installation and use process, it may be necessary to paint the defective part. Improper or excessive repainting may damage the entire surface. Scratches that don't look obvious at six feet are best left unrepaired, as normal wind erosion will cover them up. Only the peeling part of the paint should be repaired. Before painting, alcohol should be used to remove dirt, paraffin and other filth on the parts that need to be repaired. It is recommended not to use spray paint to repair large areas, because spray paint is not as good as factory pre-paint for air drying. Contact the building panel manufacturer or paint supplier for a suitable spraying system. Aerosols or sprays are not recommended to repair scratch defects. The best repair tool is a high-quality, 1/2-inch or slightly smaller paint brush. If the above method is maintained, the color coating board will keep its original color for a long time.