Edge Folding Tools | Big Rock Supply

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Single Lock Seamers

A single lock seamer bends the edges of two metal panels together at a 90-degree angle, forming a single fold along the seam. This type of seam provides moderate strength and weather resistance. Single lock seams are often used in regions with milder climates, as they are easier to install and adjust. However, they may not be as effective in extreme weather conditions, as they are more susceptible to wind uplift and water infiltration.

Double Lock Seamers

A double lock seamer, on the other hand, folds the metal seam twice, typically at 180 degrees, creating a tighter and more secure connection. This additional fold enhances the seam's strength, making it more resistant to wind, water, and temperature fluctuations. Double lock seams are commonly used in areas with harsh weather conditions, as they provide superior durability and protection.

Key Differences:

Feature	Single Lock Seamer	Double Lock Seamer
Seam Angle	90 degrees	180 degrees
Weather Resistance	Moderate	High
Wind Resistance	Lower	Stronger
Installation	Easier, quicker	More labor-intensive
Best Use Case	Mild climates, low-slope roofs	Harsh climates, steep-slope roofs

A drip edge folding tool is used in metal roofing to create precise bends for drip edges, ensuring proper water runoff and preventing moisture damage. These tools provide accurate, uniform bends, are made from durable materials, and come in various types like hand seamers and edge benders. They help achieve a professional finish, improve water protection, and save time compared to improvised bending methods.

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