Metal Spinning Roof Drains & Vent Pipe Flashing vs. Multiple Welded Pieces
Automated metal spinning from a certified metal spinning supplier is indispensable for producing roofing parts such as roof drains and roof vent pipe flashing, as it is more cost effective than multi-part drains. It is also more versatile, less time consuming, and design changes are easily accommodated.
Metal Spinning roof drains and vent pipe flashing also prevents any possibility of leakage from damage caused by inclement weather or improper welding of multiple pieces.
The automated metal spinning process also allows the cylindrical roofing component to perform in all conditions and bears no welding line, ensuring optimal strength and appearance.
This low-cost process efficiently allows you to create large volumes of cylindrical roofing components with minimal waste, and its tooling’s innovative design allows you to make changes to the production process at minimal expense.

Materials We Work With
The versatility of metal spinning allows for work with a wide range of materials essential to various roofing components:
Each material brings specific advantages to roofing applications, allowing manufacturers to match material properties to specific component requirements.



Roof Drains at Metal Craft Spinning and Stamping
Over time a flat roof may collect too much water which will cause flooding. You can easily prevent this by installing a roof drain. Roof drains are used to convey stormwater from the roof to the retaining area or the drainage sewer. Stormwater is generally received from the roof drains and moved to one of three places:
- Your city’s sewer system
- A retention pond or reservoir
- Left on the ground to naturally evaporate
Automated metal spinning can create roofing drains with a wide range of diameters as well, which is why manufacturers use metal spinning to build roofing products for all shapes, materials, and applications.
Questions to Help Select Metal Spun Roof Drains
There are several steps to take when considering which type of metal spun roof drain will be most effective for your roof. Here are seven questions to ask yourself when selecting the optimal metal spun roof drains.
Roof Vent Pipe Flashing at Metal Craft Spinning and Stamping
Roof vent pipe flashing performs an essential function for any industrial or commercial building. You’ll notice them on just about every commercial or industrial roof as vertical pipes sticking out of the superstructure.
They act to shield vent pipes in the plumbing system, supplying fresh air to each plumbing fixture in the structure. Vent pipes serve several important functions.
- Roof vents help prevent sewer gases from accumulating within a structure.
- Vents help water move properly through the drainage system.
- Vent pipes also prevent the “siphon effect” from occurring during rapid drainage, which could lead to water escaping from drain traps.
- Unobstructed roof vents prevent slow, flowing drains, standing water and sewage odors.
Poorly maintained roof vents may also result in water leakage into the structure. After all, vent pipes come out of holes in the roof, and if those holes are not airtight, then water leakage and subsequent water damage will inevitably occur.
Automated metal spinning of roof vent pipe flashing helps to prevent water leakage around roof vents. Roof flashing waterproofs vulnerable areas on a sloped industrial or commercial roof.
How to Install a Metal Spun Roof Drain
Installing a metal spun roof drain is not difficult, so long as you have the right tools and materials available to you. Here are a few common steps to follow if you want to install a commercial or industrial roof drain.
*While we as metal spinning suppliers find these to be a few helpful steps, we also advise that you consult with a roofing installation professional prior to taking on the project.
How Does Roof Vent Flashing Work?
The installation of vent pipe flashing is straightforward.
The metal spun flashing comes in a cone-shaped application with a flange at the base. The inside of the conical part is hollow, which allows the installer to slip the flashing over the vent pipe. A rubber compression fitting keeps the conical section tight around the vent, ensuring that water can’t penetrate it.
Once the metal spun flashing has been fitted around the vent pipe, it is installed underneath the roofing shingles on the top and side edges. The front edge of the base flange is left exposed. This funnels water out and away from the vent pipe, preventing water leakage or accumulation.
Custom Roof Drain Solutions at Metal Craft
Roof vent pipe flashing and roof drains formed by automated metal spinning can be made of several different types of materials, but aluminum roof drains are by far the most common option.
It is relatively inexpensive but provides solid protection against leakage, and the material allows for inexpensive, high-volume production with shorter turnaround time for your next project, no matter what your required volume.
Metal Craft Spinning & Stamping has been a premier metal spinning supplier for roof drains and vent pipe flashing for commercial and industrial markets to protect roof vent pipes since 1969, and now employs two robots fully dedicated to the automated production of these components.

This allows for quick turnaround times and high-volume orders with virtually zero deficiency kick-back. For 50 years, we have offered our clients high-quality products and premier customer service.
If you’d like to learn more about our metal spinning roof drain solutions, please contact us or request a quote today. Our team of experts will be happy to assist you.
Why Metal Craft?
With over 60 years of metal spinning experience, we deliver the highest standards of quality throughout our manufacturing process, prioritizing customer satisfaction.
Quality & Experience
With decades of metal spinning expertise, we bring precision and craftsmanship to every project, ensuring consistent, high-quality results.CNC Automation
Our state-of-the-art equipment streamlines production, delivering high-precision metal components with exceptional accuracy and repeatability.Hassle Free Shipping
Efficient logistics and dedicated support ensure that orders are delivered on time, with careful handling to maintain quality from our facility to yours.