Building Your Hollow Wood Surfboard. A guide to building a hollow cedar surfboard using 1/4" cedar planking covering a thin plywood frame. You also get one free set off blueprints featuring our patented rail construction method, making the building process easier and allowing for a better finished product. Plans are available for instant download with proof of purchase (details inside) and free real time help from the author through email to help you through the build process, along with the Timeless Surf Forum"s online community to share information and updates.