When it comes to constructing metal deck roofs, you’ll need to be aware of the various problems you can face. You’ll also want to make sure you know the different types of metal roof decking and what types of welds to look for. This article will discuss some of the most common problems associated with metal roof decking.
Problems with metal deck roofs
If you have a metal deck roof, you should be aware of common problems that can occur. For example, if you notice that one or more panels are scratched or gouged, it’s important to contact a professional right away. While it’s possible to touch up minor scratches yourself, deep scratches can only be fixed by replacing the entire panel.
One of the most common problems with metal roofs is the fact that they are more difficult to install than other roofing materials. Only contractors who specialize in installing metal roofs can do it properly, and DIY-ers should only attempt this if they have extensive experience and are skilled enough. Otherwise, they may end up with a poor-quality roof, expensive repairs, or even injury.
Moreover, metal panels will expand and contract in response to heat and cold. This can cause a buckling effect, a condition commonly known as oil canning. While oil canning does not necessarily indicate a structural problem, it is an indication that the roofer didn’t leave enough space for expansion during the coiling process. Other causes of oil canning include an uneven roof decking, misalignment of the screws, and improper temperature changes during installation.
One of the biggest problems with metal roofs is that they are often out of sight. This means that minor damage that doesn’t seem noticeable can turn into a large water intrusion problem. Moreover, the materials used in a metal deck roof are often flammable, and you may have to replace them if they catch fire.
In addition to leaks caused by aging, leaks can also occur from improperly installed seams or improperly installed fasteners. A roof with leaks can also cause damage to your valuable items. It’s best to call a professional in order to avoid further damage.
Types of metal roof decking
When it comes to metal roof decking, you have a few different options. There are Type A and Type B decks. The Type A is the older version of metal roof decking, and it’s characterized by a shallow rib depth and relatively narrow spacing between the ribs. This makes the panel much weaker than Type B and Type F, and it is often used for patchwork and repair purposes.
Type B is the most popular type of metal roof decking, with rib spacing of 1.5 inches. It’s also the most affordable. Type F, meanwhile, has been phased out over the years, and is primarily used for patchwork or repair. Ultimately, the type you choose will depend on the purpose and application of your metal roof decking. You’ll need to consult with an engineer for the right choice for your building.
Keystar Industries manufactures several types of metal roof decking that comply with the highest standards of construction steel. You’ll be able to find a variety of sizes, gauges, and finishes. Keystar Industries also stocks various accessories to match your metal roof decking. There are a number of paint systems for metal roof decking that will fit any design requirements and environmental conditions.
The steel deck is a cold-formed sheet of corrugated steel that supports the roof concrete and insulating membrane. It was developed to be structurally efficient. Bansal Metal decks have a proven track record and can provide an attractive look when coated correctly. Steel decks can also be a part of several fire-rated assemblies.
Type B metal roof decking is the most common type of metal roof decking. It’s typically used in low-span and medium-span construction projects. It’s easy to install and lightweight, making it a cost-effective option for many projects.
Standards for metal roof decking
Metal roof decking provides both weather protection and structural support for the roof. As such, it is vital to follow certain standards for decking. These are outlined below. Those using cold formed steel should follow special provisions. While a metal roof’s composition can vary, the following standards are considered the standard for the material.
Ensure that seams are level and that the underlying sheet is tightly drawn against the top sheet. Stitch connections are frequently required. Ensure that the self-drilling screws are not too small. Also, never use weld washers at the side laps between supports. In addition, make sure that adequate ventilation is available for side lap welds.
For roof decking made of steel, it is necessary to meet the requirements of ANSI/SDI RD1.0-2006. This standard specifies the design requirements for steel roof decks, including design procedures and structural components. Moreover, it includes a reference to the International Building Code, 2009 Edition.
The coatings used to protect metal roof decking should be durable and resistant to oxidation. A primer coat, although providing temporary protection, should not be considered a permanent finish. Moreover, improper handling, transportation, and job site conditions can adversely affect the quality of the finish. Although galvanized steel decking does not require field painting for structural reasons, it is often desirable for aesthetic reasons.
Metal roof panels should comply with UL 580 for wind resistance. These panels must have a certificate issued by UL, which must accompany them. The certificate must include the UL Mark, serial number, and specifications. The UL-certified panel is guaranteed to meet all the specifications.
Welding of metal roof decking
There are two basic types of metal roof decking welds: arc spot welds and arc seam welds. Arc spot welds are similar to plug welds but do not require pre-punching the thin top sheet. In this article, we will look at how these types of welds are done and how to determine whether a weld is done correctly.
When welding metal roof decking, the welds should be of a 16mm (5/8 inch) diameter and equal in strength. They should be made on a center axis of a steel beam and at the valleys where side laps occur. Power-driven fasteners may be used in place of welding if they have equivalent strength. For corrugated form deck units, the studs should be welded at the valley of the side lap and the center corrugation of the sheet.
Welding of metal roof decking should be done according to standards established by the American Welding Society (AWS). AWS D1.3 is the standard that specifies the correct weld process for metal roof decking. Proper welding can help prevent burn-holes on the roof deck.
When repairing or replacing metal roof decking, a professional should perform this job as safely as possible. The process requires specialized equipment. For example, special tools can be used to remove the excess metal. A metal decking installer should also wear protective gear, such as gloves and eyewear.
Welding of metal roof decking requires an electrode with a minimum yield strength of 33 ksi. The thickness of the deck should be 0.015 to 0.028 inches for the optimal weld. In cases where the deck is thin, E7014 electrodes with weld washers are recommended.
Installation of metal roof decking
Before you begin installing metal roof decking, it is important to understand what you need to know about installation. You need to be able to fasten the sheets to the steel framing. In order to do this, you need to have the right tool. You need to have a button punch tool that will fasten two sheets together. Your structural design drawing should indicate the spacing between the button punches. Once you know that distance, you can begin using the tool to attach the two sheets together.
There are several types of metal roof decking. One type is called solid metal roof deck. It consists of individually formed steel panels with ribs for strength. It comes in a variety of sheet gauges. Rib profiles vary, and you must choose the one that meets your design needs. Figure 6-8a shows three common rib profiles.
When installing metal roof decking, make sure that you secure it properly. Unbanded decking may be unstable, and wind can easily blow it off the structure. Make sure to secure it with straps to prevent it from ripping. In addition, remember to use safety gear while working. Wear eye protection and ear protection!
When choosing a metal roof deck, consider the weight and load of the deck. It should be able to support 30 pounds per square foot. It should also be planked in areas where material staging will be necessary. Moreover, steel deck surfaces are slippery when wet, so it is important to take extra care while working on them. Also, be sure to keep rigging well balanced when you’re hoisting loads.
When installing metal roof decking, you’ll need to cover the decking before installing the panels. Some roof deck materials require the use of underlayment, which is usually available in rolls. It provides separation between the panel and the roof joists. The underlayment material is often plywood or oriented-strand board.