If you're utilizing a metal roof on your property or considering doing so in the near future, there are a few particular processes that may be quite beneficial for your metal roofing panels and other components. One great example here is the hemming process, which is carried out using hemming tools - what is this process, and why might it be beneficial for your metal roof?
At Supply Maverick, a division of Mid Michigan Metal Sales, we're proud to offer a huge range of metal roofing tools and attachments, including a variety of metal roofing fasteners, foam closure strips and related products. We also offer many benders, hand seamers and hemming tools for use on your metal roof. What is hemming, and why might using hemming tools for your metal roof be beneficial?
What is Metal Hemming?
Before we get to hemming tools specifically for your metal roof, let's go over the general process of metal hemming. Hemming is a process that involves bending one piece of metal over the edge of another piece, creating a secure and clean joint. This technique is commonly used in metalworking for various purposes such as joining two pieces of sheet metal or adding strength to edges.
Hems can be used to strengthen edges, improve surface appearance, hide defects, and provide a smoother edge that won't cut or scratch. In metal roofing, hemming is often used to join panels together, making them more weather resistant by creating a watertight seal.
Hemming is typically done using special hemming tools that consist of clamps and folding bars. These tools allow for precise bending and control over the depth of the hems. Hemming can also be done manually with mallets and hammers, but this process is more time-consuming and may not result in as clean of a finish.
Types of Metal Hemming
There are several types of hemming out there, including flat hems, closed hems, open hems, and rolled hems. Each type of hem has its own unique features and uses.
- Flat Hems: This is the most common type of hemming, where one edge is folded over the other to create a flat seam. It is typically used for thin sheet metal or lightweight materials.
- Closed Hems: In closed hems, both edges are folded together to create a sealed seam. This type of hem is commonly used in automotive bodies as it provides a more weather-resistant seal than flat hems.
- Open Hems: As the name suggests, this type of hem leaves an opening between the two edges. It is often used for thicker sheet metal that needs extra room for bending or shaping.
- Teardrop Hems: Teardrop hems are a variation of closed hems where the edges are folded in an overlapping manner to create a stronger and more visually appealing seam. This type of hem is commonly used in aircraft structures.
Benefits of Hemming for Metal Roofing
There are several reasons you might consider hemming for your metal roof, including:
- Strengthening: As mentioned earlier, hemming provides added strength to the edges of sheet metal, making it less susceptible to bending or damage. For metal roofs, this is especially important as they are constantly exposed to harsh weather conditions such as strong winds, rain, and snow.
- Improved appearance: Hemmed edges give a neater and more finished look to metal roofing. This can be particularly beneficial for commercial or industrial buildings where the appearance of the roof plays a crucial role in creating a professional image.
- Weatherproofing: By overlapping the edges of sheet metal, hemming helps prevent water and other elements from seeping through the seams. This makes it an ideal choice for metal roofs which need to withstand heavy rainfall and other weather conditions.
- Hiding defects: If your metal roofing has any imperfections or defects, hemming can help hide them from view. By creating a smooth and seamless finish, the hemmed edges can effectively conceal any flaws in the metal sheets.
- Connecting parts: In many cases, hemming is used to connect two or more metal sheets together. This provides a strong and reliable connection that can withstand different types of stresses, such as wind and structural loads.
- Safer edges: Because hemming involves folding the edges of metal sheets, it creates a safer and smoother edge. This is especially important for roofs where workers may need to access for maintenance or repairs. The hemmed edges reduce the risk of cuts and injuries that can occur from sharp, exposed edges.
At Supply Maverick, we're happy to offer hemming tools, benders and hand seamers for these and various metal roofing needs. Contact us today to learn more about these or any of our other metal roofing supplies, such as metal roofing fasteners or foam closure strips.
