What is a metal roofing system? 2011-5-2
   What is a metal roofing system?
First, the definition of metal roofing metal roofing sheet metal is used as roof material, the structure layer and waterproof layer into one of the roof form. Many different types of sheet metal, zinc plate, galvanized plate, aluminum plate, aluminum-magnesium alloy plate, titanium plate, copper, stainless steel panels. Thickness of 0.4 ~ 1.5mm, the surface of the general board for coating processing. As the quality of different materials and coatings, and some panel life of up to 50 years. The production of a variety of plate shape, and some composite panels, about two layers of insulation composite sheet metal in between, and some for the board, the construction, some panels in the plant is completed on-site assembly, according to some roofing projects require on-site processing. Insulation and some good in the factory compound, can also be produced in the field. So the sheet metal roof forms, from large public buildings to factories, warehouses, housing, etc. are used. Therefore, sheet metal roofing specification scope is waterproof grade I ~ III-class roof. [1]
Second, the metal roof type
Roof to roll joints sealed together design, production and design of the construction site with the same length of roof, installed after the roof construction without its connection, and there is no exposed screws, in addition to the appearance of the roof to ensure the integrity of the building, both Premium waterproof, anti-seepage, anti-snow function.
Board design 65 and 75 mm high rib rib up from from 300 to 500 mm with high-performance drainage section, an effective solution to low-slope roof (> 1.5 °) water and drainage problems.
faszip65-420R and 75-400R of the plate specially designed to enhance board reinforcement ribs to increase structural strength, and building exterior lines to provide more texture, the main supply in southwest China market. 65-300/400/500 board design more supple plastic, inside and outside the arc shape to fit the size of architectural design; and 75-380/480 board design while retaining the plasticity, the special height rib tank to 75mm, with a thick composite double-layer bottom plate roof system, more suitable for coastal typhoon rain-fed areas.
Feature
• No connection port, no screw holes, the full appearance of the building
* Can be bent and made from outside the arc within the arc
* Choose different materials and colors
* Overall structural waterproofing, drainage
* Can be as small as 1.5 ° for the slope of the roof
* Excellent performance of wind pressure (with negatives), especially for typhoons, storms are more regions
* Eliminate the pressure generated by thermal expansion and contraction
* Simple, fast machine roll together, construction convenient, economical
* Sound-absorbing layer to facilitate the laying insulation
• No chemical caulking compounds, eliminating the problem of pollution and aging
* No maintenance roof
* Can be produced on site
80-400/420 stand upright double-lock quick and easy side, roof and folding bracket bite method using 360 pairs, the board can be folded side is sealed up in a standing seam, standing seam this fully engaged with the bracket to form a continuous weather roof, so water is basically no chance to enter the building. Holder's consideration of thermal displacement, making the plate in the length direction of the relative displacement can be produced, eliminating the stress generated when the roof inflated.
Third, the metal roofing material
All roof and exterior structure of the roof imported dedicated AA3004 series Al-Mg-Mn alloy sheet production; other special items can be equipped in accordance with the 3004 Al-Mg-Mn alloy, stainless steel 304 / 316, copper or titanium metal building dedicated . Special aluminum alloy for the production of roofing systems, the useful life of the main building with the same [British standard BS5427: 1976].
Color Coating
The Al-Mg-Mn alloy sheet can be accompanied by another American or Australian imports of construction-specific PVDF / PVF2 polyvinylidene fluoride / color coating fluorocarbon resin paint system, used in industrial and civil construction, the color coating life of up to 15 - [20] depending on atmospheric conditions.
Other Aluminum
* Europe 3005 and 3105 also roofing and wall materials common.
* If the requirements for the maritime climate, better corrosion resistance can be equipped with aluminum-magnesium alloy 5005 and 5052.
* 3004 H44 aluminum-magnesium alloy of aluminum, manganese one. H44 is the layer and annealing condition.
Fourth, the metal roofing system
1) up side seam system
(1) the overall structural waterproofing, drainage, regardless of how the building shape, can fully engaged seams, no nail holes throughout the roof, the roof can either make changes in the free expansion temperature to prevent thermal stress, but also put an end to the screw by the system fixation caused by the leakage risk.
(2) No chemical caulking compounds, eliminating the pollution and aging.
(3) the overall maturity of the roof openings and lightning protection system design.
(4), good ventilation, maintain the overall structure of the long-term natural drying, to extend the building life.
(5) specific three-dimensional curved arc shape and easy processing.
(6) structure is simple, lightweight, safe, high strength and resistance to negative pressure in the typhoon, heavy rain area is especially suitable.
(7) also applies to the old roof in the old house renovation and construction of new roof surface.
(8) construction of safe, simple, fast, accurate and economical.
2) roofing system
(1) is a lightweight, high strength, waterproof, corrosion-resistant, highly adaptable and environmentally friendly system, easy and other building materials and systems integration.
(2) stand side bite plate and the plate, no leakage of the lap joint problems, waterproof and reliable.
(3) exhaust port, sunroof, pipeline exports directly piercing, using welding accessories, to ensure water tightness.
(4) bearing occlusal side and the formation of hidden connections, solve the resulting thermal expansion and contraction due to destructive.
(5) bearing insulation pads, a metal roofing system to solve heat conduction problems.
(6) the advantages of low weight system to the roof renovation, transformation, have the advantage.
3) classic buckle cover system
(1) the overall structural waterproofing and drainage functions.
(2) without chemical adhesive caulk caulking, remove the pollution and aging.
(3) natural circulation ventilation structure, to extend the building life.
(4) simple structure, compact and safe.
4) Flat lock systems
(1) the overall structural waterproofing and drainage functions.
(2) without chemical caulking compounds, eliminating the pollution and aging.
(3) natural circulation ventilation structure, to extend the building life.
(4) specific three-dimensional curved arc shape and easy processing.
(5) simple structure, lightweight, safe, diverse grid.
(6) construction safety, fast, accurate and economic
5) flat slab system
Is a difficult process to use the sheet metal panel system, requiring stainless steel, titanium and other metal surfaces smooth, and double waterproof, so the system has within the collection tank.
Mainly used for difficult to process the plate.
6) pressure plate system
For simple roof structure, the sheet metal roofing systems, is the most economical system, widely used for civil and industrial buildings public buildings roof, such as stadiums, awning, exhibition halls, stadiums, auditoriums, industrial plants and other buildings.
7) cell plate systems
(1) the use of air pressure chamber works such as water, and there will be a small amount of water within the tank discharge guide.
(2) without chemical caulking compounds, eliminating the pollution and aging.
8) metal roofing  system
[2]
360 ° double-crimping fully supported roofing system, water filling without other auxiliary materials, roof ribs to 360 ° folding electric lock closure, to win the title of the roof off completely impermeable, waterproof.
Roof can make a special three-dimensional processing into the arc, arc of different sizes can be installed into the dome.
The board has a high rib, in improving the water resistance, this can also make the roof line is more obvious, and available materials in addition to steel, there are aluminum, stainless steel, titanium and other metals zinc and copper, making the more colorful metal roofing .
Choose a variety of materials
Roof and wall systems have the largest selection of materials, its up to 88% material utilization, for the discerning architects use materials, precious metals as a roofing system provides a convenient and possible, to enhance the effect of roofing and building the overall grade of the waterproof At the same time, access to good economic performance indicators. For selection of materials: titanium, copper, titanium zinc, copper, stainless steel, magnesium manganese alloy, anodized aluminum, galvanized steel and so on.
Features:
1 overall structural waterproofing, drainage;
(2) structure is simple, lightweight, safe;
3 construction and installation of flexible, rapid, accurate, economical;
4. Without silicone caulking, silicone to avoid pollution problems of aging, life extension;
5 natural circulation ventilation structure, growth life;
6 Three-dimensional curved arc shape easily;
Fifth, metal roofing design factors to be considered
Bearing
Withstand construction loads, rain, dust, snow pressure, maintenance load. Performance and load-bearing metal roof plate section properties, the strength of the material thickness, the force transmission means, purlins (Vice purlin) spacing on.
Wind pressure
Local maximum wind pressure resistance, the metal roof will not be pulled off the negative air pressure. Wind resistance and the metal roof and the bracket buckle together, the bracket density.
Noise
Reached from the outside to prevent the sound from the indoor or outdoor indoor spread. Fill in the layer of metal roofing insulation materials (usually cotton as insulation), the effect of metal roofing insulation layer on both sides of the sound intensity difference in decibels. Sound insulation and sound insulation material density, thickness. It should be noted: insulation material for different frequencies of sound barrier effect is not the same.
Seepage
To prevent rainwater infiltration from the outside to the inside metal roof. Rain water mainly through the gap or overlap the node into the metal roof. Impervious to achieve the function, need to screw the mouth after using the gasket fixed with hidden, in the board's lap with sealant or welding process, it is best to use a long-pass plate to eliminate overlap, in a variety of node parts of the abdominal distension tight waterproofing treatment.
Lightning
To lead to ground lightning, thunder and lightning to prevent the breakdown of metal roof into the interior.
Lighting
Improve indoor lighting through skylights during the day, to save energy. A specific location in the metal roofing panels or lighting glass lighting arrangement should be considered the life of the metal roof skylights, in coordination with the metal roof skylights connection waterproofing treatment.
Safety devices
Set on the metal roof fixed facilities to protect construction workers and maintenance personnel.
Anti-icicle
Rain and snow at the eaves to prevent icicles formed at.
Beautiful
Metal roofing looks good texture, pleasing color.
Control thermal expansion and contraction
Control the contraction of the metal roof displacement and direction. Ensure that the temperature difference between the metal roof in the area will not produce thermal expansion and contraction of stress and damage.
Insulation
Prevent heat transfer on both sides of the metal roof, indoor temperatures stable. Function through the roof insulation under the metal fill insulation materials (commonly used with glass wool, rock wool) to achieve the insulation effect to the U-value, the unit is W/M2K. Insulation by the following factors: cotton insulation materials, density, thickness; insulation cotton humidity, and lower metal roof structure connection (to prevent "cold bridge" phenomenon); metal roofing layer capabilities of the repeated thermal radiation.
Sound-absorbing
Reduce the reflection of sound and reduce echo chamber. Sound-absorbing function by the underlying metal roof were laid in the sound-absorbing cotton and punching on the floor to achieve. The acoustic properties of the metal roof to a sound absorption coefficient, said.
Moistureproof
To prevent the bottom of the metal roofing and metal roofing layer water vapor condensation to drain away the water vapor layer of metal roofing. The solution is filled in the metal layer of roof insulation cotton, capped with metal roof home floor waterproof membrane, metal roof can be ventilated on the node.
Fireproof
Metal roofing materials when the fire is not burning, the flames will not penetrate the metal roof.
Ventilation
Indoor and outside air exchange. Set on the metal roof vents.
Anti-avalanche
In the snow on the roof area of ​​the metal railings set to block the snow to prevent a sudden fall of snow.
Pollution
Metal roofing materials will not cause environmental pollution, light metal roof surface without dye.
Normal life
Metal roof the main building life should be the same as 25 years, 50 years, 100 years.
Maintain
Facilitate the use of metal roofs in the maintenance period, reducing maintenance costs.
Cost
Control of the metal roof construction costs.

edited by stone coated steel roofing tiles