stone coated steel roof New friends 1

Published:2011-11-08 01:48:24 Source: Views:2572

In today's highly competitive roofing market, a contractor to be successful in the professional and quality must go in front, for example, to correctly select the roofing systems and products. Residential metal roofing system is very good - kind of program will help to improve the contractor's position in the competition.

In recent years, residential stone coated metal roofing products in the application has increased. In some areas, such as coastal and mountainous areas, the use of metal roofing system is more common than in the past. Experience has shown that climate extremes, with more and more metal roofing.

Metal Roofing Association (MRA) is expected in the residential stone coated steel roofing market share of 20% per year will be 25% growth rate. To achieve this goal, the metal roofing industry must continue to focus on improving the user's awareness, but also must increase efforts to roofing contractors and distributors of commercial products and their use for training. Perhaps the most fundamental difference is clear difference between the metal roofing products and their differences in a successful meet the requirements of owners of metal roofing systems in the role.

1 Application

Of residential metal roofing is a mistake to think that the majority of the roof for new construction. In fact, NRCA annual market survey in 2004, 11% of residential metal roofing for the new 56% renovation and 11% for maintenance and repair. Visible, more for the refurbishment of the metal roof, one of the reasons is that many stone coated metal roofing products to the laying of the existing roof, as well as some variety of standing seam metal tile products.

Commercially available product variety and often people will do a muddle. In North America, with over 100 vinyl tile, imitation shingles, slate and clay tile, concrete tile and other tile material. Since each product is the exclusive production and sales, and not interoperable. To ensure proper construction and application is necessary to understand some of the products of knowledge.

2 products

In determining the form of a metal roofing system, it is necessary to choose the geometry of the roof slope and products. For example, most of the roof tile products for minimum slope of 3 / 12. Low sloping roof, the main use of on-site mechanical or hand joints standing seam panels, such as "double-lock" or "Three Rings" board.

Modulus products are mostly interlocking panels, ranging in size from 203 mm × 305mm to 610mm × 914 mm. This roof system approach to a variety of thermal expansion and contraction problems. Some used in the construction or expansion sliding clip, thermal expansion when the board "float" up; some products are designed to use the board "folding effect", the equivalent of S-shaped plate can withstand thermal expansion and contraction of many fold. Such products can be made into imitation stone or imitation glass tile, vinyl tile, and other imitation Tongwa or flat tile.

These products exist in the metal plate with the stiffness and the space between the grass-roots level so that they can be self-connected in the renovation of the existing roof on the shop. In fact, such systems can even through the use of wood or tile shop in a special fixation on the shingles.

In addition to the special form of modulus-board, there are many products available for residential vertical seam. These products are spread to the roof from the house along with the rafters, or parallel or perpendicular. Vertical seam roofing products include a variety of fixed waveforms through standing seam panels and products.

Penetrate the roof panels have a variety of standard length, when laid end with horizontal lap joints and can also be broken in the field size to avoid the end of the lap. The length of standing seam products are generally customized to meet the actual size of the roof.

All vertical joints in laying a key factor when products must understand that the manufacturer requires board shop in the slats or solid panel. Although these products were originally laid in strips, but the application in agriculture often requires manufacturers to use solid panels and cushion.

Penetration of fixed or fixed-length standing seam roofing products safe transport is important because sometimes panels up to 8 m long or even longer. To avoid such a transportation problem, sometimes the roll forming machine can be moved into the field production. Even so, the board still need to be careful on-site transportation and require specialized knowledge, because many board is shipped upright.

3 types of metal

Discussed above, a variety of metal roofing products can be made of different metals to achieve specific effects and features. MRA survey, stone coated metal roofing products with the main material is steel, there are two forms, galvanized and Galvalume.

Galvanized steel, zinc plated to increase corrosion resistance, Galvalume coated steel, aluminum alloy, it is also for preservation purposes. Both have a variety of steel grades. Classification is based on both sides of the steel-plated zinc or aluminum coating thickness determined. Metal Construction Association, in accordance with quality standards, if the metal surface coating, then, G90 galvanized steel is the recommended minimum level, AZ50 Galvalume is the recommended minimum level. If the surface finishing or transparent coating applied when the recommended level of Galvalume AZ 55.

There are other metals can be used, such as aluminum, copper, zinc, stainless steel and tin-lead alloy. Aluminum is mainly used for the purpose of preservation and use of its malleability, can be processed into a fine wood grain tile effect of the product. There is always made of aluminum roof coating or anodized for a special color and better durability. Copper, zinc and stainless steel more for no coating applications. Copper is mainly the use of its good durability and rich features aeruginous. Zinc is also used for the purpose of corrosion and its malleability, low-gloss gray appearance. Stainless steel is used to obtain long-lasting, shiny silver appearance or to meet specific corrosive environment.

4 Product Compatibility

Metal roof construction, according to the electrochemical point of view, the system of all materials used must be compatible, otherwise, and even between different metals and other materials will occur between the electrolysis and corrosion. This includes the fixed parts, flashing, gutters and adjacent wall materials, they must be compatible with, or avoid contact.

As mentioned above, for aesthetic, many of the metal surface has a coating or overlay. There are several coatings, including acrylic, polyester, silicone polyester, and polyvinylidene fluoride (PVDF). PVDF coatings are registered trade name Kynar and Hvlar, they are always applied to the metal roof molding on the front. Also include more long-lasting paint color fastness and resistance to chalking performance, this - point, negotiate with customers is very important.

Familiar with the coatings industry knows that most will not fade the paint is ceramic pigments, organic pigments than your use of this pigment coating better than inorganic pigments. PVDF paint coatings used to improve viscosity of the resin is a fluoride, can produce a strong molecular bond will firmly grasp the paint to prevent chalking. Some modulus metal tile is applied later in forming the coating, known as "coated", will help to ensure that the process of being stretched in the shape of the metal surface to get adequate coverage. The most common type is coated stone cladding, there will be ceramic bonded to the steel surface of the stone surface. The other is applied in the forming plate powder coating, PVDF powder coatings are common. These products have the texture and paint to make a variety of colors.

Dedicated to improving the metal coating on the durability of metal roofing, roofing products, especially steel, coated with high-quality coatings can protect the grassroots from the climate, is the durability of the product with a method. In addition, metal roofing system there are many other advantages.

5 Advantages

One of the advantages of metal shore side is light weight - like aluminum tile roof weighs only 4.84 kg / m2, stone cladding tile roof is 16.15kg/m2, significantly lower than other roofing materials such as fiberglass shingles 25 .8 ~ 40 4kg/m2. As the light weight, this product can be used in the original roof, applied to reduce the weight of the roof structure.

In addition,stone coated metal roofing system of interlocking or non interlocking features between the metal plate and the roof fixed and the fixed nature of most metal roofing system that has a good expose of the wind. In many cases, the product can reach UL 580 "Standard Roof Test wind exposed" under the UL 90 level or UL1897 "wind exposed roof covering system standards" requirement.

High wind exposing the metal roof is the priority use in many places to get one of the reasons, but in some places the use of the system is to use its fire resistance. In fact, the last 1960s and 1970s in the United States some of your favorite places with shingles, vinyl tile on the use of aluminum and stone coated steel roofing products as fire. Over the past few decades the use of various types of metal roofing is a lot out of this consideration.

2003 International Building Code requirements for fire performance of roofing systems should be tested, but not including steel and copper tiles (board) roof, taking into account their inherent good fire performance. Of course, during the best metal roofing pre-construction check what the local building codes.

Another advantage is that the metal system above the coating can make it "cool" roofing system. Coating on the metal roof surface will not be set because of its smooth gray, often porous or rough than in the roofing material on the surface of the coating can longer be kept clean and light colors. Owners can periodically rinse with clean water. In addition, for most of the coating on the metal roof with high radiation, according to the different coating, the radiation rate of 0.75 minimum, maximum up to 0.95, the roof absorbs the heat released soon back to the atmosphere.

As technology advances, many metal roofing products used in paint pigments added to the infrared reflectance, these specially treated pigments, even in dark colors can also have very high solar reflectance performance. For example, non-reflective dark brown metal surface total solar reflectance coatings only 6% to 8%, reflecting pigments added, the total solar reflectance can be increased to 25% to 30% or even higher. This meets the government agencies and public sector on the "cold" roof reflectivity requirements of the initial value.

In addition, metal roofing system design and cushion between the metal roof or metal placed between the stationary and the air space, heat conduction through the suspension to further improve energy efficiency. Test in accordance with the Florida Solar Energy Center, and the use of traditional roofing materials, many of the traditional metal tile roof in imitation of the still air of the attic space is to make the heat by 30% or more of a factor. For laying the battens on the modulus of the product, and standing seam metal roofing products, it is still possible by setting the ventilation of the space to further improve energy efficiency.

Another advantage of metal products in the recycled materials content. For most of the steel roof of the metal containing 25% to 35% recycled materials. In the non-ferrous metals such as aluminum, copper, recycled material content of up to 95%.

Sustainability of the metal roof is a major environmental factor, and its good durability reduces the consumption of raw materials in future. The life of metal roofing systems and related products used. Uncoated steel roof can last 20 to 30 years, plus a longer coat. There for the original coating or cladding stone roof systems often guarantee period of up to 30 to 50 years, and re-applied coating life can be extended. Even after reaching the life Metal roofing can also be 100% recycling.

Most metal roofing easy to bend, can be adapted to unconventional forms of roof designs, including round, oval and with a convex curve of the roof. For standing seam metal roofing system, many manufacturers offer matching wedge, narrow bottom width to accommodate the round roof top needs, as well as curved surface concave or convex for rafters.

Other hand, the modulus of the metal roofing panels have different ways to adapt to special roof. Many tile cross-section is curved for a round roof. In addition, 381 mm or less exposed some of the module board is very easy for most of the roof curve. Of course, the most fundamental thing is to get information and help the manufacturer to decide how to live doing the best.

6 Annex

Although some form of special need for customsheet metal roofing and flashing, but the residential metal roofing manufacturers offer a wide range of standard accessories, can be used for roof, gable, roof drains, roof and wall slope change and roof junction . In some cases, the manufacturer may also provide on-site production of accessories drawings. Many homes include roof detail-oriented rainwater from the roof drip edge of the sink.

For standing seam roofing system, the bottom edge of each piece of board or drip edge pieces around the starting roll. Standing seam roof panel with a clip and grip, and then fixed to live in the upper plate. For a fixed vertical plate penetration and some can not be locked to the start of tile-shaped pieces of board, the manufacturer will usually provide sealing of the roof fixed and the final and detailed steps.

There are several methods of disposal gable, usually depends on roof shape. There are three basic roof gutter forms, used in conjunction with a variety of metal roofing: flat discoid drains, l or 2, and drains the pan so that the roof water drains (open valley).

The disposal of the roof there are several methods. Most vertical plate with long roof and roof cover, - as long 3 m or 4 m.

Wall, roof slope changes and the transfer of processing often requires on-site production of the pan of water to meet the roof shape. Manufacturers recommend some form of pan-water, in small bending machine or at a local metal processing plant production. Skylights and chimneys often need a special pan of water, also some well-known brand manufacturers provide supporting pan of water.

For skylights and chimneys should not be important to remember that over-reliance on sealant. Although the need for the appearance of the sealant, waterproofing can be used as auxiliary means, but any stone coated metal roof system flashing the first line of defense should be a pan of water itself. Sealant and waterproof cushion is just an added measure.

Skylight in the roof should be done on the circle, so that the roof height was significantly higher than the metal plate. Whenever possible, the chimney at the pan of water should be embedded in masonry structure. Roof wall junction should be inserted or pan of water up out into the wall.

Attic ventilation and pipe construction shall be the manufacturer's requirements. Metal roofing system designed specifically for the Pan-there are many kinds of water, and sometimes even the color can be very well equipped.

Of course, experienced roofing contractors know, when you think you have met all of the roofing situation, new problems again. Should be remembered that the basic principles of design pan of water is always water in the metal plate to make the top surface flow. Good design often pan of water under the roof waterproof auxiliary channel to increase water reliability. Another point is not to make the roof on the trash, leaves, snow and ice blocking the water path. In addition, a special pan of water on to the roof design should consult the manufacturer of metal building or reference NRCA Roofing Manual (The NRCA Architectural SheetMetal and MetalRoofine Manu al).

7 ventilation

Manufacturers recommended practice roof ventilation, may include proprietary products and commercially available roof ventilation products. Many vertical seam ventilation products produced through the use of special closed with the air can flow between the ribs on the roof, eaves pull air as the air inlet care.

Many people have a wrong perception that metal roofing systems need to increase attic ventilation. In fact, no matter what kind of attic ventilation is critical in roofing materials, metal, and use of the system have not the slightest change. In the choice of roof ventilation should also be considered when. Must remember that the amount of condensation produced warm air and cold as the result of surface contact. The purpose of attic ventilation is to remove condensation from happening.

8 Construction

Residential metal roofing system to be set up cushion on the grounds that: the system in the roof structure during construction to keep dry; is an additional means of water; the condensation occurred in the plate on the back, to avoid the roof damp grass roots.

Although 30 years of roofing felt is the standard choice of cushion, but now the contractor has turned to the synthesis of new lighter materials, so that the area covered by each volume more. Of course, the specifications are required, they can use self-adhesive cushion. The surface of these products are smooth, without granules and thus will not damage the metal plate on the back.

Also, in most of the metals to be careful walking on the roof. Contractor to the owner shows how to walk on the roof more secure, better able to leave a written guide. Walking on the steep roof, no matter what material is a challenge, metal roofing is no exception. In many cases, the ladder fixed to the roof, and then the ladder of sheets of support and access aisle.

Most manufacturers offer various forms of construction training.

In the past, metal roofing for residential purposes, property owners and contractors, lack of training, lack of awareness is a major obstacle to the promotion of this roof, and now the situation has greatly improved.

edited by stone coated steel roof