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Board-Building 101: FAQs
Got questions? We’ve got answers. From resin application tips to a breakdown of our CNC board design process, we cover everything you need to know. Get the details, dial in your process, and build better boards.
Glossing with polyester resin is less problematic than hot coating because the gloss layer is usually much thinner. Surface preparation is essential to ensure maximum mechanical bond. Thoroughly sand the epoxy hot coat with no finer than 100 grit before glossing.
GR epoxy is compatible with both EPS and polyurethane blanks.
Most common surfboard pigments/tints are compatible with GR epoxy although they will cause some loss in physical properties. Usage should be less than 5% by weight to ensure the least effect on physical properties. A small test batch with any pigment is highly recommended to ensure that there is no inhibition of cure.
Although it can be done, hot coating with polyester resin is not recommended because the results can be unpredictable. The bond between epoxy and polyester is purely mechanical and chipping polyester hot coats are a not uncommon occurrence without sufficient prep of the epoxy lamination.
Cure times are very temperature-dependent. At temperatures of 75° to 85° F, flip times are in the 1½ to 2½ hour range and full cure will occur over the next 3 to 5 days.
GR epoxy is designed to fully cure at normal room temperature, but a post cure of 110° to 130° F will increase some physical properties (primarily HDT).
Hot coats applied within the first 24 hours of lamination will not require sanding of the lamination. If more time has passed, the lamination should be lightly sanded with special attention paid to any shiny areas in the lamination.
Green Room epoxy has excellent sanding properties and is free of any additional additives. Most difficulties with sanding occur when the epoxy has not cured sufficiently. If the epoxy is clogging the sandpaper, allow more time to cure before continuing sanding.
We recommend that only the resin side be warmed in cold weather. Immersion of the resin container in a bucket of hot water (less than 100° F) is the preferred method. Use caution that the resin is not contaminated with water. Using a microwave oven to heat the resin is not encouraged and the hardener should never be placed in a microwave.
CNC (Computer Numerical Control) shaping is a process that uses a precision machine to cut and shape surfboards with incredible accuracy. This technology allows us to design boards customized to your exact specifications for excellent consistency and performance.
CNC shaping takes custom surfboard design to the next level by providing exact measurements, smooth curves, and perfect symmetry. Whether you’re after a high-performance shortboard or a classic longboard, this process ensures precision that’s hard to achieve by hand.
We offer full design services, meaning we can craft your board from scratch or fine-tune an existing concept. Our CNC shaping process allows us to create specialty boards that perform exactly as you need.
Absolutely. The CNC machine does the initial shaping, but the board still goes through our expert hand-finishing, glassing, and detailing. This combination of technology and craftsmanship gives you a board with both precision and personality.
Locations Worldwide
With locations across the U.S. and beyond, Green Room Board Co. is bringing exclusive surfboard-building materials to shapers around the world.
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