
Roofing nails are used to hold shingles in place, but they can sometimes be too long and protrude through the underside of the roof. This can be unsightly and even dangerous, so it is important to know how to cut them safely and effectively. There are several tools that can be used to cut roofing nails, including end-cutting pliers, flush side cutters, oscillating tools, and even a hammer to bend the nails over. It is important to consider the potential for damage to the surrounding wood and the finish of the ceiling when deciding on a method, as well as the time and effort required to cut each nail.
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What You'll Learn

Using end-cutting pliers
When using end-cutting pliers, it is important to wear protective gear, such as safety goggles and gloves, to prevent any injuries from flying nails or sharp edges. It is also recommended to have a strong magnet on hand to catch any cut nails, as they can be sharp and hard to retrieve.
To cut a roofing nail with end-cutting pliers, start by positioning the pliers firmly around the nail, as close to the surface as possible. Squeeze the handles tightly to cut through the nail. Depending on the thickness of the nail, you may need to apply significant force. Once the nail is cut, release the pressure on the pliers and tap the unwanted end sideways to break it off completely.
While end-cutting pliers are a convenient option, they may not be the best choice if you are looking for a perfectly flush cut. In that case, you may need to consider using a grinder or cutoff wheel instead. Additionally, if you have a large number of nails to cut, it might be worth investing in a power tool, such as an oscillating tool with a metal-cutting bit, to speed up the process.
Overall, end-cutting pliers are a useful tool for cutting roofing nails, especially if you prioritising convenience and speed over a perfectly flush result.
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Using flush side cutters
Flush side cutters are a good option for cutting roofing nails. They are designed to cut nails as flush as possible to the surface, reducing the risk of accidents and creating a neat finish.
When using flush side cutters, it is important to choose the right size for the job. For roofing nails, a good-sized pair of cutters will make light work of the task. It is also important to wear the proper safety gear, including eye protection and gloves, as there is a risk of sparks when cutting nails.
To use the flush side cutters, position the cutters as close to the surface as possible, and squeeze the handles firmly to cut through the nail. Depending on the thickness of the nail, you may need to apply significant force. Once the nail is cut, release the pressure on the handles, and tap the unwanted end sideways to break it off.
Flush side cutters can be used in combination with other tools for a faster and more efficient job. For example, you can use a pneumatic cutoff tool or an oscillating tool to cut through the majority of the nail, and then use the flush side cutters to trim it down to size and ensure a flush finish. This can reduce the amount of force required and speed up the process.
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Using a hammer to bend nails
First, identify the nails that are exposed and need to be bent over. It is important to ensure that you have a firm grip on the hammer and a steady stance, as you will need to apply force to bend the nail. Hold the hammer towards the end of the handle, giving yourself enough room to swing but also maintaining control.
Position the hammer at the base of the nail head. This will give you the necessary leverage to bend the nail. In a swift and controlled motion, swing the hammer in an arc towards the nail, making sure to keep your grip firm. The force of the blow should cause the nail to bend over. If the nail does not bend with the first strike, you can re-adjust your grip and try again, applying more force.
It is important to note that this method may not work for all nails, especially those that are particularly long or thick. For more stubborn nails, you may need to use a combination of tools, such as a nail bar or a hammer and a nail set, to first loosen and then bend or remove the nail.
Additionally, consider the direction in which you are bending the nail. Bending the nail back towards the roofing material can help to minimize the chance of injury from the sharp end of the nail. This method also allows for easier removal in the future, as the nail can be accessed from above.
Using a hammer to bend roofing nails is a simple and effective method that does not require power tools. It can be a good solution when dealing with a small number of exposed nails, providing an upper-body workout in the process!
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Using a dremel with a cut-off disc
However, it is important to note that the Dremel's cut-off discs may not be durable enough for this task. Some sources indicate that the Dremel's blades or bits can dull quickly, break, or shatter when used for cutting nails. Therefore, it is recommended to have extra blades on hand if you plan to use this method.
To use the Dremel with a cut-off disc for cutting roofing nails, follow these steps:
- Put on the appropriate safety gear, including eye protection and ear protection. Grinding and cutting nails can generate sparks and loud noises, so it is crucial to safeguard your eyes and ears.
- Adjust the Dremel's settings to a suitable speed for cutting metal. Refer to the user manual for specific instructions on adjusting the speed.
- Stabilize the Dremel by ensuring you have a firm grip and a steady hand.
- Work slowly and carefully. Position the cut-off disc at the base of the nail, as close to the surface as possible, and begin cutting. Take your time to avoid damaging the surrounding area.
- If you are concerned about damaging the wood, you can try cutting only three-quarters of the nail and then bending it back and forth to snap it. Alternatively, you can use a multitool with a flat blade to avoid damaging the wood.
- Once the nails are cut, be cautious as the ends may still be sharp.
- Dispose of the cut nails safely, and ensure that all debris is cleared from the area.
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Using a grinder with a metal cutting wheel
If you decide to use a grinder, there are a few things to keep in mind. First, always wear safety goggles, hearing protection, and eye protection. It is also a good idea to keep a fire extinguisher nearby, as sparks may be created during the cutting process.
When using a grinder with a metal cutting wheel, it is important to use the correct type of wheel. A cut-off wheel is the best option, as it will allow you to cut through the nails quickly and with minimal fatigue. You can use a fairly high-speed corded drill with a mandrel chucked into it, using the edge of the disk to cut through the nail.
Another thing to consider is the size of the grinder. A mini grinder with a cut-off wheel is a good choice, as it will allow you to cut through the nails in approximately five to ten seconds per nail.
Finally, it is important to dispose of any metal scraps safely. Metal can have sharp edges, so dispose of waste correctly to prevent injuries or accidents.
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Frequently asked questions
End-cutting pliers, nail nippers, flush side cutters, or an oscillating tool with a metal-cutting bit are all good options. If you don't need a completely flush surface, end nippers with long handles will do the job with less risk of damage to the surrounding surface.
Wear eye protection and gloves, and be mindful of sparks and sharp edges. Use a magnet to catch any cut nails, and consider using oil primer if you're cutting many nails with a grinder.
Yes, you can bend over exposed nails with a hammer. They will still be removable with slightly more effort. Alternatively, you can cover them with sheathing or paint over them.
Shorter nails are easier to cut and are less likely to poke through the roof.
A Dremel with a cut-off disc, vise grips, a MultiMaster with a metal blade, or a 4" grinder with a metal cutting wheel can also be used.










































