You always laminate the bottom of the blank first. If you choose to do a cutlap, you need to tape off and mask the top of the blank before you lay your fiberglass down on the bottom of the blank. More details on cutlap techniques are presented in the Cutlap Preparation section. You can do a pretty good cutlap on your first try if you have good tape and good technique.
While we wouldn’t recommend doing this on your first glass job, we wouldn’t talk you out of it either. The cutlap requires s few more tools/materials and a bit more preparation. The max glass schedule you would want on a longboard is about 16 oz on the bottom and 18 oz on the top. Go up from there if you want to increase the durability (and weight) of your longboard. This would be for a pretty light longboard. Most longboards typically have at least a single 6 oz bottom and double 6 oz top glass schedule. For most shortboards, it is not recommended to have much more than 10-12 oz total on the bottom and 12 oz of glass on the top, it'll make the board heavier and not worth the extra strength. This setup will use less resin in the seal coat stage of glassing and keep the board lighter. When you are layering 4 oz and 6 oz together, it is best to put the heavier cloth on first, and the lighter cloth on the outer layer. Another way to add additional strength is a “deck patch” under the main layers to reinforce the area you stand on, which takes a lot of abuse from your feet. The next step might be two layers of 4 oz on the bottom and a layer of 6/4 on the top. If you want to increase the strength/weight of your shortboard, you can simply go up from there. This gives you additional strength in the fin area without adding too much weight.
Set 4 perfect layers tools borders kit Patch#
For this super-light glass schedule, you may also want to add a small patch of 4 oz glass under the main layer in the fin box area.
The extra glass on the top gives you some protection from pressure dings from your feet and other bodily contact. The lightest glass schedule that you would want to use is one layer of 4 oz on the bottom and two layers of 4 oz on the top. Read more about the different types of fiberglass cloth SHORTBOARDS There are a few more types of fiberglass cloth used in surfboard building and you can tailor the strength-to-weight-ratio by incorporating different fiberglass in your surfboard lamination. The most common weights for surfboards are 4 oz and 6 oz per square yard. Fiberglass is measured by weight per square yard. Surfboard and SUP fiberglass comes in rolls which are 30” to 42” wide and meant to be cut to the correct length and width once the glass is rolled out over your blank. The more glass you use, the heavier, but stronger your board will be. This is called the “glass schedule” and it dictates the final strength and weight of your board. The first step in glassing is to determine how much fiberglass cloth you are going to put on your board. Nonetheless, we are confident you’ll get a good result if you prepare and follow these directions. Like anything, it takes some practice to perfect the art of glassing. Don’t expect your first glass job to go perfectly. This guide will cover glassing your surfboard with traditional fiberglass hand layup method, both “freelap” and “cutlap” techniques, using state-of-the-art Greenlight Marine Grade Epoxy resin and Silmar 249B Polyester resin. Epoxy resin must be used with EPS foam cores but can also be used on Polyurethane foam cores with great success as well. Epoxy is much less toxic to work with, but just as importantly, we feel it makes a stronger, longer-lasting, better flexing surfboard. At Greenlight, we like to focus on the more environmentally friendly methods of construction, which is one reason why we prefer glassing with Epoxy resin. Like shaping, glassing your surfboard becomes much less intimidating once you break it down into clear steps, use the right tools, and do some simple preparation prior to each step. Laminating the fiberglass to the foam is step one, seal coating with resin is step 2. "Glassing" is a term used for the entire process of fiberglassing and sealing the board.
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