Snaps On Boat Covers: A Step-By-Step Guide

Boat owners often assume that all snaps on their boats are stainless steel, but this is not always the case. While stainless steel is stronger and holds its finish better, snaps can also come in nickel-plated brass, which many shops still use. Before putting snaps on your boat cover, you should be aware that there are different types of snaps for different applications, depending on angles and wind factors. The most common snaps used on canvas boat covers are glove button fasteners or durable-type snaps, which consist of a button and socket that are crimped together. You can purchase snap button fastener kits online, which include button caps, sockets, studs, eyelets, and installation tools.

Choosing the right snaps for your boat cover

When it comes to choosing the right snaps for your boat cover, there are several factors to consider to ensure a secure fit. Firstly, it is important to select the appropriate type of snap for your specific application, taking into account factors such as angles and wind factors. The most common type of snap used on canvas boat covers is the glove button fastener or durable-type snap, also known as Dot fasteners or Fasnap. These consist of a button and socket that form the female snap, and an eyelet and stud that form the male snap. Another option is the YKK Snads, which are domed plastic snaps with adhesive backs that do not require drilling holes into your boat.

The material of the snaps is also an important consideration. Marine-grade stainless steel snaps are typically recommended as they hold their finish better, are stronger, and last longer than other materials. However, nickel-plated brass snaps can also be used and will do a fine job as long as they are seated properly into the canvas. It is worth noting that not all snaps marketed for boats are made of stainless steel, so it is important to check the material before purchasing.

In addition to the type and material of the snaps, you should also consider the dimensions of your boat when choosing snaps for your cover. The perimeter of the cover should cinch around your boat for the best fit. It is important to select top-quality snaps that match the specific dimensions of your boat to ensure a trouble-free boating experience.

Using an installation tool to put snaps on a boat cover

Selecting the Right Installation Tool:

• Snap Fastener Installation Tool: This is the most basic and affordable option. It comes with a metal anvil that has two sides, one for setting buttons and the other for setting eyelets. However, it's not very durable and can't be used for stainless steel snaps. It also requires pre-cutting a hole in the fabric.
• Sailrite Snap Fastener Deluxe Installation Tool: A stronger and more durable option made of heat-treated metal. It can install stainless steel snaps and comes with a similar anvil for setting buttons and eyelets. It also requires pre-cutting a hole in the fabric.
• Sailrite ® SnapRite® System Complete Kit: This system uses four unique dies and any standard rivet tool to install snaps in one step. It helps with positioning snaps accurately and can be used anywhere on the fabric without restrictions. However, it requires the use of SnapRite® Mandrels and special buttons with a hole in the center.
• Pres-N-Snap Tool: A professional-grade tool that allows one-handed installation. It uses dies to install snaps in one step and can also install grommets. Additional dies can be purchased for different snap types, but they can be expensive. The tool has a throat restriction that limits where snaps can be installed.
• Sailrite® HandyPress®: A bench-mounted hand press compatible with most brands' dies. It installs various fasteners, cuts holes, and punches stitching holes. It's a versatile tool that combines the functions of multiple presses and hand-held tools.

Installation Process:

• Prepare the Boat Cover: Before starting, ensure your boat cover is clean and dry. If you're replacing old snaps, remove them carefully, and fill any existing holes with an appropriate filler to create a smooth surface.
• Mark the Snap Locations: Accurately marking the locations for the snaps is crucial. You can use a tool like the Easy Fit Kit or the SnapRite® System to mark the positions. The Easy Fit Kit allows you to mark all socket positions by snapping pin sockets to the installed studs and poking the fabric onto the pins. The SnapRite® System uses an orange socket die that snaps onto the installed stud, and you poke the fabric over the mandrel.
• Install the Snaps: Follow the instructions for your chosen installation tool. Most tools will require you to cut a small hole in the fabric before installing the snaps. Carefully align the snaps with the marked locations and use the tool to secure them in place.
• Test the Snaps: Once you've installed all the snaps, test their security by applying gentle pressure to ensure they hold firmly in place.
• Maintenance: To ensure the longevity of your snaps, regular maintenance is important. Keep them clean and lubricate moving parts as needed to prevent sticking.

By following these steps and choosing the right installation tool, you can confidently install snaps on your boat cover, ensuring a secure and snug fit.

Repairing broken fasteners on a boat cover

• Assess the damage: Carefully inspect your boat cover for any signs of damage, including broken or worn-out snaps.
• Gather your tools: You will need a drill, a drill motor, a drill bit, a small hammer, a punch or two, and some patience. It is recommended to have a colour-correct gel coat patch putty kit, wet/dry sandpaper in grits ranging from 320-1000, and rubbing and polishing compounds for a smooth finish.
• Drill through the snap: Place the drill bit into your drill motor, ensuring it is larger than the size of the rivet in the snap. Position the drill bit at the centre of the snap and drill through until you reach the top of the rivet.
• Remove the rivet: As you drill through, the rivet should come off. If the pulling shaft remains, use a small punch to gently pound it through, creating a hole.
• Remove the remaining rivet shaft: Use a slightly smaller punch to gently tap out the remaining rivet shaft through the hole.
• Prepare the surface: If filling the hole left by the snap, use a countersink to create a good bonding surface for the filler.
• Fill the hole: Apply gel coat patch putty to fill the hole and let it set overnight.
• Sand and polish: Once the filler has set, use wet/dry sandpaper to sand down the filled area, starting with a lower grit and gradually working your way up to a higher grit for a smooth transition. Finish by using rubbing and polishing compounds to create an even surface.
• Install new snaps: Purchase a snap fastener kit suitable for your boat cover, ensuring it is specifically designed for marine use. Snap fastener sets typically include four components: the eyelet, stud, button, and socket. Follow the kit instructions for installation, using tools such as a snap fastener tool, snap installation tool, or snap fastener pliers.
• Maintenance and prevention: Regular maintenance and inspections are crucial to keep your boat cover in top condition. Clean your boat cover every three to six months, depending on usage. When not in use, store your cover in a dry, protected area away from direct sunlight. Consider using additional protective covers, such as boat tarps, for extra protection from harsh weather conditions.

Replacing snaps on a boat cover

Assess the Situation:

Before starting, it's important to determine if the snaps are indeed weak or damaged. Check if the snaps are securely fastened to the cover and the hull. If they are loose or easily detachable, it's best to replace them.

Gather the Right Tools:

You will need a few specialized tools for this job. The most common tool used by professionals is the Pres-n-Snap® tool built by Hoover, which creates a high-quality crimp. However, this tool can be expensive. An alternative is to use an anvil-style set tool, such as a heavy-duty anvil, or vice grip tools like the Time Saver vice pliers. Additionally, you will need a hammer or mallet, sharp scissors, a sharp pencil, chalk, and a flat-head screwdriver with a narrow 1/4" tip.

Choose the Right Snaps:

There are different types of snaps available, such as Dot® Fasteners, YKK Snads, and Screw Studs. Dot fasteners are the most common type used on canvas boat covers and consist of a button and socket (female) and an eyelet and stud (male) that are crimped together. YKK Snads are domed plastic snaps with adhesive backs, which are useful when you don't want to drill holes into your boat. Screw studs, as the name suggests, are screwed into the boat and are male companions to the button fasteners.

Prepare the Cover:

Before installing new snaps, it's important to reinforce the canvas where the snap will be attached to ensure it doesn't rip through the fabric. If the cover is damaged, repair it first. Mark the locations for the new snaps, and if necessary, sew on a patch over any tears or enlarged holes.

Install the Snaps:

Follow the instructions for your chosen snap type and tool. For example, with Dot fasteners, you would crimp together the button and socket, and the eyelet and stud separately. Then, attach the female snap to the cover and the male snap to the boat. When using an anvil-style tool, flip it over to set the different parts of the snap. With vice grip tools, you can quickly attach the snaps without the need for a hammer. Ensure that the snaps are securely attached and test them to make sure they don't spin or move freely.

Additional Tips:

• If you're trailering, consider installing rear-facing vents to suck the cover down and reduce pressure on the snaps.
• When drilling into fiberglass, always countersink the hole to smoothen the sharp edges.
• If you encounter enlarged holes in the fiberglass, try using a screw stud with a larger base or a plastic drywall anchor to secure the snap.
• For aluminum surfaces, use a 9/64 drill bit, and if it's too thick, move up to a 5/32" size.
• When drilling into windshield metal, proceed with caution to avoid breaking the glass.

Different types of snaps for different applications

When it comes to boat cover snaps, there is no one-size-fits-all solution. The type of snap you need will depend on various factors, such as the angle and wind conditions. Here is a detailed guide to help you choose the right snaps for your boat cover:

Button Fasteners

Button fasteners, also known as glove button fasteners or durable-type snaps, are the most common type of snaps used on canvas boat covers. They typically come in two parts: the female snap, which consists of a button and socket crimped together, and the male snap, formed by crimping an eyelet and stud together. These fasteners are available in different materials, including stainless steel and nickel-plated brass. Stainless steel is known for its superior strength and finish, while nickel-plated brass is also a viable option if seated properly.

YKK Snads

YKK, a renowned manufacturer of marine zippers, has introduced domed plastic snaps with adhesive backs. These snaps are highly versatile as they can be used without drilling holes into your boat. The strong adhesive backing ensures a long-lasting hold. YKK Snads are compatible with various brands of button or durable snaps, making them a convenient choice for DIY boat cover repairs.

Screw Studs

Screw studs are male companions to button fasteners and are available in different sizes and lengths. They are typically used with enlarged holes that cannot hold smaller screws.

Directional Fasteners

Directional fasteners are specifically designed to address the challenge of keeping boat covers snapped in place, especially when dealing with sharp angles. Here are the three most common types of directional fasteners:

Curtain Fasteners (Twist Fasteners)

Curtain fasteners, also known as twist fasteners or turnbutton fasteners, are a popular choice among boaters. They feature a male base with a long or short shank and a female eyelet. The eyelet has small prongs that are installed by punching a hole in the canvas. This type of fastener is easy to use and has a low failure rate.

Pull-the-Dot Snaps

Pull-the-Dot snaps resemble glove buttons but have the words "Pull the Dot" on the top. They can be confusing as they look like standard snaps, but they only come off in one direction. This unique feature can lead to tugging and jerking, potentially causing tears in the canvas. Lubrication is necessary to prevent them from becoming sticky as they age.

Lift-the-Dot Snaps

Lift-the-Dot snaps are another type of directional fastener that only opens from one direction. They have a lower profile than curtain fasteners, reducing the risk of stubbed toes or banged knees. However, they may require replacement if the tiny spring inside the eyelet hole becomes sprung. Regular lubrication is recommended to keep them functioning smoothly.

Frequently asked questions