***scroll down for TL;DR*** Hey folks, Let me start by apologizing if any of what I say is ignorant or has been addressed in other forum posts here before. I've been doing some research now for months and I still have questions that I hope someone here can help me with. I'm a Canadian (therefore in Canada...) looking to build a 10'6 SUP. This will be my first ever surfboard/SUP build. I understand everything about the building process thanks to some very informative videos on youtube, especially by Andrew W, and some others out there, but the parts themselves (fiberglass, epoxy, foam, etc) I need help with. -FIBERGLASS- I'm sure there are several other options out there, but I've found these two places in Canada that seem like somewhere I could buy fiberglass from (https://www.rayplex.ca/fabric-cloth-6oz-38-.html & http://shop.compositescanada.com/#/product/FIB060-3733-60-LY). The issue though, is that these options are extremely expensive compared to what I found in the states (http://www.uscomposites.com/cloth.html ***The 60" 6oz***). I want to use the 60" cloth because I plan to use the extra width for other projects. Now, even with conversion, tax, shipping, duty, buying the fiberglass from the states is a couple hundred dollars cheaper for the amount I want. Makes no sense to me, but who am I to argue. What I need help with though, is understanding why the fiberglass is SO MUCH MORE expensive in Canada. Also, if I buy from uscomposites, it makes sense to buy my epoxy from them too, to save on shipping and what not, but that brings me to my next point. -EPOXY- If you google surfboard epoxy, you get boards, not resin. If you google surfboard epoxy resin, you get one of two options, Resin Research or the greenlight marine grade epoxy. I've tried to find lists of resin brands that people have used and tried and I honestly can't find anything useful. Does anyone have a list of brands that are known to work for surfboard construction? Also, from uscomposites, I have the options of the more expensive West System, or their own brand (http://www.uscomposites.com/epoxy.html). I've contacted them but I don't think they fully understood the nature of my questions. I was told that their epoxy takes up to 6 months to cure, that it's not a finish (when trying to explain the hot coat and gloss coat process), and goes gooey in the sun. This doesn't really make sense to me based on what I've read. Their FAQ lists canoe/kayak lamination as an appropriate application for their thin epoxy system so... IDK. Greenlight has a 10 facts about epoxy page (https://greenlightsurfsupply.com/blogs/news/10-facts-about-epoxy-resins-you-need-to-know) and number 7 is that epoxies soften at high temperatures. I have to imagine the uscomposites was refering to the same process, but they made it sound like their epoxy would turn into a gummy bear type gooey and fall apart or something. Has anyone here used their thin epoxy before, and if so, how did it turn out? The medium and fast hardeners have a slight amber hue that isn't a deal breaker, but I'd prefer a crystal clear finish. -EPOXY AMOUNTS- This is kind of a tough one. I've been trying to calculate how much epoxy I need for a SUP for ages now. Greenlight has a chart (https://greenlightsurfsupply.com/bl...f-board-length-for-epoxy-and-polyester-resins) that suggests the amount of resin needed for different sizes. I'm doing a 6oz x2 top and bottom. I think the calculations came out to something like 1.5 or 1.85 gallons for 1 SUP, but I've seen other forums where people say 1.5 gallons is enough for 2 longboards and a shortboard. I've seen videos of people using 1/2 as much epoxy as is the minimum recommendation from this chart and having excess in the end. Honestly this is the most confusing part in my opinion. Has anyone followed the Greenlight chart. How much resin did you end up wasting or did you have the right amount? -FOAM- Finally, I'm planning on building this out of EPS foam from home depot. I'm not looking to make a super performance racing SUP, this is just a for fun project. I have however considered the possibility of using polyester resin with a polyurethane core instead. The issue however is that I've google where I could buy just a big rectangular chunk of PU and I couldn't find it. Anywhere. Did I miss something somewhere? Odds are still that I'll go with the EPS but on the off chance it's cheaper to go PU with PR, I'd do that. -TL;DR- Why is fiberglass so much more expensive in Canada? cheaper to buy in the US even after shipping, duty, taxes and conversion. Has anyone used uscomposites thin epoxy (http://www.uscomposites.com/epoxy.html) for a surfboard/SUP? How did it turn out? how much epoxy do I really need? This chart seems to suggest 2x the amount that I've seen others use (https://greenlightsurfsupply.com/bl...f-board-length-for-epoxy-and-polyester-resins) Where the heck to you buy PU blanks or just a big rectangular chunk? -FINAL THOUGHTS- Again, if any of this is very obvious to others and it seems like I didn't do my research, I apologize. I've just found it difficult to get clear, to the point, information. I really really really appreciate anyone who's taken the time to read and reply to this and I'm grateful for any information you can pass along my way. Cheers!