
Do it Plastic Cap Nails are 1-inch hardware nails with a ring shank nail and round plastic insulation caps. They are used for fastening foamboard, roofing felt, insulation, house wraps, and film. They are also useful for insulation boards and vinyl siding. These nails are critical to the IBHS Roof standard as they add strength to the hold on the underlayment in case the top layer comes off.
| Characteristics | Values |
|---|---|
| Use | Fastening foamboard, roofing felt, insulation, house wraps, film, etc. |
| Roofing | Can be used to hold down the roofing underlayment |
| Advantages | Provides a strong and long-lasting bond, improves water damage protection |
| Size | 1 inch |
| Shape | Round |
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What You'll Learn

Plastic cap nails are used for fastening roofing felt
Plastic cap nails are a type of fastener used in roofing and construction. They are characterised by a plastic cap on top of the nail head, which increases their holding strength and provides a reliable seal. This cap also ensures that the nails do not show through the roofing material, allowing shingles to lay flat.
Plastic cap nails are commonly used for fastening roofing felt and other underlayment materials such as tar paper or high-tech roof underlayments. The nails provide a strong and long-lasting bond, securing the underlayment to the roof deck. This secondary layer of protection is essential in providing additional support and acting as a barrier against rain, snow, and wind.
In severe weather conditions, plastic cap nails help prevent water damage by securely holding the underlayment in place. They are particularly useful in windy areas, as they reduce the chances of the entire roof being blown off if a tree limb or strong wind compromises a small part of the roof. The plastic cap spreads the load over a larger area, reducing the amount of tearing that can occur if the underlayment is exposed to wind before it is fully shingled.
Additionally, plastic cap nails are suitable for a variety of roofing applications beyond just underlayment. They can be used for securing sheathing, foam board insulation, tarps, and roll roofing. Plastic cap nails are also compatible with specific house wraps, creating a tight, weatherproof fit for the building.
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They are also useful for insulation board
Plastic cap nails are a great option for insulation board. They are useful for attaching underlayment, tar paper, felt paper, insulation board, and house wrap. The ring shank provides enhanced holding power, and the plastic cap reduces pull-through and distributes holding power. This is especially important if you live in an area with high winds, as the plastic cap nails will help to keep your insulation board securely in place.
One of the main benefits of using plastic cap nails for insulation board is their ability to reduce tearing. If the underlayment is exposed to wind before it is fully installed, plastic cap nails will prevent the head from tearing right through. They spread the load over a much larger area, providing more protection. This is particularly useful for insulation board as it helps to create a more secure seal, keeping your home insulated and reducing the risk of water damage.
Additionally, plastic cap nails are often used for roofing underlayment, and they can provide the same benefits for insulation board. The plastic disk around the head of the nail increases the surface area under the nail head, providing more protection and helping to keep your insulation board in place.
Plastic cap nails are also available in a variety of quantities, ranging from 100 to 4000 pieces, so you can choose the amount that best suits your needs. They are easy to hammer in and provide great functionality, making them a popular choice for insulation board installation.
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They are critical to the IBHS Roof standard
The Insurance Institute for Business & Home Safety (IBHS) has developed the FORTIFIED construction method, a nationally recognized building method based on scientific research and real-world testing. The FORTIFIED Roof program was designed to prevent damage that occurs during high winds, hurricanes, hailstorms, and severe thunderstorms.
Plastic cap roofing nails are critical to the IBHS Roof standard. They are used to hold down the roofing underlayment, which is the first line of defense against moisture. When severe weather hits, a low-quality moisture barrier can cause water damage. Plastic cap nails are the solution to properly securing the underlayment with a strong and long-lasting bond. They are especially useful in windy areas, as they add strength to the hold on the underlayment in case the top layer comes off. This is important because the greatest loss in wind storms comes from water intrusion after the loss of the roof covering.
For example, if tree limbs were to bust through only a small part of the roof, wind could get under the underlayment and blow the entire roof off down to the bare wood. This is what happened in the St. Petersburg, Florida area during the 2023 hurricane season. A tree branch put a hole in a room, but then the wind ripped off the roofing materials because the underlayment wasn't secured with cap nails.
Cap nails also offer improved holding power due to the clinch they provide between the cap and sub-surface. They offer better performance, faster installations, and safer working conditions, resulting in a superior final product.
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Plastic cap nails are better than standard nails or staples
Plastic cap nails are a great option for your roofing or siding project, offering several advantages over standard nails or staples.
Firstly, they provide a strong and long-lasting bond, ensuring your roofing underlayment is securely held in place. This is crucial, as strong winds can easily rip off roofing materials if the underlayment isn't properly secured. In fact, they are so strong that they are critical to the IBHS Roof standard. This is especially important in areas prone to hurricanes or strong winds, as they can withstand extreme weather conditions, including Category 5 hurricane-sustained winds of 150 to 180 miles per hour.
Secondly, plastic cap nails create a reliable seal that helps prevent moisture damage. This is a significant improvement over standard nails, which may not form an effective seal and leave your roof vulnerable to water intrusion.
Additionally, plastic cap nails are safer and faster to install than standard nails or staples. With a cap nailer or stapler, you can maintain full control with just one hand, reducing the risk of accidents, especially when working on a sloped roof.
While some people may opt for standard nails or staples due to the cost or availability of plastic cap nails, it's important to consider the long-term benefits of a stronger, more durable, and safer option. Plastic cap nails provide peace of mind, knowing that your roof is securely fastened and protected from the elements.
Overall, when it comes to roofing or siding projects, plastic cap nails offer superior performance, improved safety, and a more reliable seal compared to standard nails or staples, making them a better choice for your project.
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They are available in 1-inch sizes
Plastic cap nails are available in 1-inch sizes and are commonly used for roofing and insulation. They are perfect for securing roofing underlayment, especially in windy areas, as they provide added strength and wind resistance. The 1-inch size is suitable for various applications, including fastening foamboard, roofing felt, insulation, house wraps, and film.
These nails are an excellent choice for homeowners looking to improve the durability of their roofs. They can be used to secure roofing shingles, providing an additional layer of protection against moisture intrusion. In severe weather conditions, a strong and long-lasting bond created by these nails can help prevent water damage.
The 1-inch size is also ideal for insulation applications. Plastic cap nails can be used with insulation boards, ensuring a tight hold and contributing to the overall energy efficiency of a structure. They are a popular choice among contractors due to their ease of use and the speed of installation they offer.
Additionally, the 1-inch plastic cap nails are versatile enough to be used with pneumatic cap nailers, providing a safer and more efficient alternative to traditional hammers. This combination of collated cap fasteners and pneumatic tools results in better performance, faster installations, and improved safety during the construction process.
Overall, the availability of plastic cap nails in 1-inch sizes makes them a versatile and reliable option for roofing, insulation, and other applications where a strong and secure hold is required.
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Frequently asked questions
Do-it-Best plastic cap nails are used for fastening foamboard, roofing felt, insulation, house wraps, and film. They are also used to hold down roofing underlayment.
Do-it-Best plastic cap nails offer a strong and long-lasting bond. They are more durable, code-compliant, and create a reliable seal that can withstand harsh weather conditions. They also offer improved holding power due to the clinch between the cap and subsurface.
Metal cap nails are available as an alternative to plastic cap nails. Cap staples are another option for less dense materials like insulation or house wrap.








































