Ayrton Oneill
Installing canvas snaps in a fiberglass boat is a tedious task that requires a lot of precision. The process involves marking the desired position of sockets and buttons, using a tool to punch holes, and then installing the snaps. It is important to ensure that the button on the cloth and the stud on the surface line up correctly. One can use a SnapRite System, which is an entire snap installation system that uses four unique dies and any standard rivet tool to install snap components. The studs are typically installed via standard Phillips head or machine screws, but these can sometimes splinter the surface. To avoid this, a pop rivet tool can be used.
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What You'll Learn
Choosing the right snap/screw combo
When choosing the right snap/screw combo, it is important to consider the specific requirements and characteristics of your boat. Here are some factors to consider:
The type of snap: There are different types of snaps available, such as regular snaps or snap studs. Regular snaps can be modified to work with stainless steel screws. Snap studs are available at stores like McMaster-Carr.
The material of the screws: Stainless steel screws are a common choice for installing snaps in fiberglass boats. Ensure the screws are compatible with the snaps and the boat's material.
The use of adhesives: It is recommended to use an adhesive or sealant along with the screws. Silicone sealant is a common choice, but it can be difficult to clean and may not adhere well to cured silicone or its residue. Alternatives suggested include Dolphinite, 3M 4200, 3M 4000 UV, and 5200.
The installation method: You can choose between drilling and screwing the snaps into the fiberglass or using pop-rivets for installation. Both methods have their advantages and may depend on your personal preference and the specific application.
The location of the snaps: Consider the placement of the snaps on your boat. Snaps can be installed around the perimeter of the canvas, on window coverings, enclosures, or rail coverings. The location may influence the type of snap/screw combo and installation method chosen.
By considering these factors, you can make an informed decision about the right snap/screw combo for your fiberglass boat. It is always recommended to consult with marine stores or experts for specific product recommendations and installation advice.
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Positioning the snaps accurately
Firstly, decide on the desired locations for your surface studs. This step is important as the studs will act as a guide for installing the buttons and sockets in the fabric. Mark these locations carefully, considering the overall canvas project. It is recommended to use a position marker like the Easy Fit Kit, which allows you to mark all the socket positions accurately.
Once you have determined the locations, install the surface studs. You can use standard Phillips head or machine screws to attach them, but be cautious as this method can sometimes splinter the surface. An alternative is to use a pop rivet tool, such as the SnapRite Surface Mount Stud Die, which can prevent splintering and securely hold the stud and rivet in place.
Now that the studs are in place, you can use them as a guide for the fabric. Snap one of the Easy Fit Pin Sockets onto the installed stud, then poke the fabric onto the pin. This step ensures that the button on the cloth aligns with the stud on the surface. After marking the fabric, use the Easy Fit Release Tool to detach the pin sockets from the studs.
Finally, take the canvas to a workbench and carefully remove the pins. The holes left by the pins will guide you during snap installation. You can use a tool like the SnapRite System, which includes four unique dies and a rivet tool, to install the snaps directly over the studs without moving back to the workbench. Alternatively, you can use a setting tool and anvil, rapping it with a hammer to set the snap, or pliers to squeeze the socket part of the snap onto the button's barrel.
Remember, accurate positioning is key to a successful installation. Take your time, double-check your measurements and markings, and choose the method that works best for you.
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Using the right tools
When installing canvas snaps in a fibreglass boat, it is important to use the right tools to ensure a secure fit and avoid damaging your boat. The tools you will need depend on the type of snap fasteners you are using and the condition of your boat.
If you are installing snap fasteners for the first time, you will need to drill holes in the fibreglass. To avoid splintering the surface, you can use a pop rivet tool to install the studs. However, keep in mind that balancing all the small pieces can be tricky, and the studs may not fit tightly. Alternatively, you can use standard Phillips head or machine screws to install the surface studs. Remember to ream out the hole (countersink) to prevent cracking the gel coat when screwing in the screws.
If you are reinstalling snaps, you may need to remove the old glue or caulking from the previous snaps. You can use a small drill bit to chase out the old glue, ensuring that the bit is small enough to not drill out the threads made by the previous screws. If the holes are filled with 5200 or similar caulking, you can simply screw through the existing caulking. After installing the new snaps, carefully scrape away any excess caulking with a non-marring tool, such as a plastic blade or a sliver of wood. Then, wipe away any remaining film with a rag dampened with paint thinner, kerosene, or diesel fuel.
To accurately position the snaps, you can use a positioning system like the Easy Fit Kit or the SnapRite System. These systems allow you to mark the desired locations of the snaps and ensure proper alignment between the button on the cloth and the stud on the surface. The SnapRite System includes a SnapRite Surface Mount Stud Die that screws into the end of a standard pop rivet tool, making it easier to set the snap studs securely.
For installing the snaps, you can use a basic pliers-like tool, which is often included in snap repair kits. If you are installing snaps through thick, doubled-over seams, a setting tool and anvil that you rap with a hammer may be a better option.
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Sealing the screws
Epoxy and Filler
If you are sealing screw holes and not planning to put the screws back in, you can use epoxy with a filler to thicken it up so it doesn't run. You can then use a gel coat to match the colour of the boat.
Dolphinite
This is a product suggested by a user on a forum. It is not clear if this is a type of epoxy or another type of sealant.
3M 4200
This is a type of glue that can be used to fill screw holes. It is important to make sure that the epoxy is fully cured before drilling. You can also use a small drill bit to chase the old glue out before filling with new glue.
3M 5200
This is a permanent sealant that can be used to fill screw holes. However, it is flexible so you do not want to put a gel coat on top of it. It is also important to note that fresh silicone will not adhere to cured silicone or the film it leaves behind.
Butyl Tape
Butyl tape is a type of sealant that has been used by high-end builders for decades. It can be used to seal around screws, but it does ooze a little.
Golf Tee and Goop
If all else fails, you can take a white golf tee, cover it in goop, and slam it into the hole. Then, cut it off and re-drill when set.
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Repairing and replacing snaps
To repair a snap that has pulled out of the canvas, you will need to assess the damage. If there is tearing, you will need to sew or glue a patch to the underside of the fabric. The patch should be at least four times bigger than the hole. If you are gluing the patch, use a product like Amazing Goop, available from hardware stores and online, and weight or clamp the patch for several hours. If you are sewing, use Tenara thread or braided fishing line and a good-size needle.
To replace the snap, you will need to punch a hole through the canvas using a 1/8-inch hole punch or an awl. Insert the barrel or shaft of the button part of the snap through the hole from the top side of the fabric. Slide the socket part of the snap onto the button’s barrel from below. If using a pliers tool, squeeze hard. If using a setting tool, make sure all is lined up and, with the canvas on a sturdy surface, deliver a sharp blow with a hammer.
If you need to remove a snap, the method is to drill out the rivet in the socket piece of the upper half of the fastener set. The drill bit needs to be bigger than the size of the rivet so you can drill off the rim. Once that's drilled off, you can remove both the socket and button. You'll also use this technique for removing the bottom half of the fastener assembly.
When installing the base for snaps on a fiberglass boat, it is recommended to ream out the hole (countersink) so you don't crack the gelcoat when screwing in the snap. You can also use pop rivets. Remember to use an adhesive in the hole, such as silicone sealant, 3M 4200, or Dolphinite.
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Frequently asked questions
You can purchase snap/screw combos from most marine stores. To install them, you can drill into the fiberglass and attach the snap with a screw and a little silicone sealant or pop-rivet them in. Make sure you ream the hole out (countersink) so you don't crack the gel coat when screwing them in.
The best tool is called a Pres-N-Snap, available from marine supply outfits like Sailrite and on Amazon. It punches the hole and installs the snap in one go.
The SnapRite System is an entire snap installation system that uses four unique dies and any standard rivet tool to install snaps components. To position the snaps, snap one of the Easy Fit Pin Sockets to the installed stud. Then, poke the fabric onto the pin.
