BS 1088 is the coin of the realm, the sine qua non of plywood grades. For now, Vendia is expensive and hard to get in the United States, and it comes in unusual sizes (16 100 is one option). We use BS 6566 okoume selectively at Chesapeake Light Craft without issue. SO, I did just get off the phone with Austin at Columbia Forest Products. Strong for its weight and with a pleasing honey-colored grain figure, okoume is a heaven-sent choice for lightweight stitch-and-glue boats. table folding legs industrial northern tables lowes tools 1713 leg collect later remember saw week previous Boats designed for it, especially of the stitch-and-glue variety, might be difficult to assemble if a stiffer material such as fir or meranti were substituted. For flooring underlayment applications, can screws be used when fastening, ICC-700 National Green Building Standard (NGBS), What is the best way to remove the label from the backside of the, Meranti Plywood / Lauan / Luan vs. RevolutionPly. Starting at 14 (6mm) thickness, the imported varieties will have five veneers or more. Glue for marine plywood is a settled science. The, No. Patricks understanding and resourceful customer declared force majeure instead of unleashing lawyers. Lots of great choices remain, but you cant simply judge marine plywood by its stamp. Its expensive, so if youre committed to using sapele, look for the Lloyds Register Type Approval. Equatorial Africa is damp, and plywood made there would warp the moment it arrived in a less humid climate. However, the address he emailed me from is ARBartlett@CFPWood.com. Sapele is a tall deciduous tree, a relative of African mahogany. (For those keeping track, the new equivalent is BS EN 315.) I started building boats in the 1980s. Its easier to list what BS 1088 allows than what it prohibits: Sound pin knots, as many as two per square foot on average; longitudinal joints in the face veneers every 20cm; variations in the advertised thicknessfor example, 6mm plywood can range between 5.35mm and 6.04mm. He told me that they do make, and sell through Home Depot as a special order from the Pro Desk, a regular construction 1/8" birch plywood with one good face suitable for finishing.

RevolutionPly panels are designed for interior applications only. ), A single, privately owned 600,000-hectare (about 2,300 sq miles) forest yields 90 percent of Jouberts okoume. The big mills insist that the resource is prudently and thoughtfully managed and offer as proof alphabet soups of official certifications, some of which cost millions of dollars to obtain.

Among the stamps youll see on marine plywood are the letters WBP. This stands for water and boil proof, resistance to boiling being the established standard for the strength of glues. Once a particular stand has been harvested, loggers may not enter that area again for 25 years. This will eliminate potential flooring issues resulting from insufficient and incorrect fastener placement. In addition, gluing the underlayment panels to your structural subfloor will eliminate the opportunity to remove the underlayment for a future floor replacement. Since the face veneers find their way to the plywood sheets in sequential order, its common to find a grain feature echoed right down through a pallet of a hundred sheets. By law, no okoume logs may leave the country. If you want to make plywood, your veneer mill has to be in Gabon, where it can benefit the local economy.

Several suppliers told me that MDO shouldnt be used below the waterline because the relevant standards allow more core voids than marine plywood, but durable utility skiffs have in fact been built out of it. The second method is to leave an expansion joint, approximately the thickness of a nickel, between the panels, and fill the seams with a Portland Cement-based seam filler. Flexing the panel will help to reveal any delamination or core imperfections. Thicker plywood takes longer to cure. Patriot Timber Products, Inc.117 S Westgate DriveGreensboro, NC 27407Fax: 336-299-4050, Go to Patriot Timber's Flex and Look Test Page to see the 4 simple steps or to watch a short video. Plywood quality varies depending upon its intended use, and builders should be well acquainted with grading standards. The companies that have been around a long time have a track record of consistent quality. Sapele is denser, heavier, and stronger than okoume, making it an excellent choice for boats that have wide unsupported spans and dont rely on fiberglass. Lloyds Register Type Approval is not available for 6566 and its equivalents. The BS 1088 specification applies to tropical hardwood plywoodthat is to say, okoume, sapele, meranti, and a few others. Its not very durable, but judicious use of fiberglass and epoxy will take care of that. The important thing to understand is that it is a voluntary standard. All the veneersin RevolutionPly plywood come from plantation and sustainable wood sources. My understanding is that both the bending and the regular 1/8" plywood typically have 3 layers, but the difference lies with the orientation of the grain. We strongly recommend you read our full instructions on using seam filler and how to prevent telegraphing seams in ourRevolutionPlyInstallation Instructionsor by watching ourSurePlyPremium Underlayment Installation Video. Its worth a few more bucks.

Marine plywood manufacturers who sign up for Lloyds Register Type Approval receive regular factory inspections, submit samples, and in general are expected to shoot straight. Okoume is now so ubiquitous in small-boat construction that it scarcely needs introduction.

JH. So how do you find the good imported stuff? Average and better marine plywood will be free of core voids.

RevolutionPly plywood is a higher quality panel than Meranti plywood and Lauan/Luan plywood. Meranti belongs to the family Dipterocarpaceae, lowland rainforest trees that are native to Southeast Asia. Now officially retired, BS 6566 persists as a recognized standard for slightly lesser plywood. Heres what I can tell you, based on my 20-year relationship with the French mill Joubert, Chesapeake Light Crafts main supplier. Let us all know how it all works out Theresa God grant me the strength to restore the trailers I can. Contemporary plywood hulls can be elegant and refined. More on shipping and other trade services. No. The trees are selectively harvested; foresters locate trees with a GPS. Sapele is more expensive than both meranti and okoume, but its grain is more appealing. The prospective plywood boatbuilder of 2017 wades into a thicket of unenforced standards, uneven quality, and outright flim-flammery. Nowadays its unusual for suppliers to stock sheets larger than 4 8 (1.23 meters 2.5 meters). Our preferred method is to lightly butt the panels together for a patch-free installation. In my experience both are equally durable. Exterior grade panels are acceptable for plywood boat construction., Glen L. Witt, Boatbuilding with Plywood, 1962, AC [exterior plywood] gets my vote because of its competitive price, its wide availability, and its equivalent building strength., Harold Dynamite Payson, Build the New Instant Boats, 1984. Ive had trouble with the grain of its face veneers tearing when cut. Likewise, fir is notorious for checking as soon as you get it outdoors. Durability is not okoumes strong suit. It was developed as a weatherproof material for the manufacture of highway signs, and it does indeed take paint well and is durable. Which side of the panel goes face down in flooring underlayment applications? Its changed very little in 50 years, and the quality is uniformly good. Its impossible to talk about marine plywood without a clear-eyed discussion of the classification system. The result has the strength and stability of plywood but looks a lot more like solid timber. Please note you may leave an expansion joint without seam filler when theRevolutionPlypanels are installed under carpet, engineered floors, or wood floors. While classified as a hardwood, its soft, flexible, and very light. (The U.S. equivalent would be ANSI, the American National Standards Institute.). Designers always specify an epoxy or fiberglass coating. Within a week came big trouble. It was sapele, Patrick said, generally the best marine plywood money can buy. The plywood was also stamped BS 1088, the code indicating conformity with the universally accepted British Standards Institute specifications for marine plywood. I have on my desk as I write this a scrap of the plywood used to build the doomed Rescue Minor.

A thick panel and a thin panel both eat up the same two valuable face veneers, but the mill can charge a lot more for the thick panel. Its a cousin to lauan. The Flex and Look Test is an important procedure that only takes a few seconds and should be applied to any panel prior to use. Engine and gear were retrieved from the ruined Rescue Minor, and the following winter Patrick built the client another Atkin powerboat. Aucoumea klaineana is an African hardwood found in the Congo Basin. John C. Harris designs, builds, and writes about boats at Chesapeake Light Craft in Annapolis, Maryland. RevolutionPly plywood is certified for points toward ICC-700 National Green Building Standard (NGBS). Most meranti is a better fit with the BS 6566 stamp. There are no BS 1088 police was a line I heard repeated by several different suppliers. Jiangsu Hanbao Building Material Co., Ltd. 100000 cubic meters per Month Bending plywood, Bending plywood flexible marine plywood for sale, Standard Packing Inner Packing-Pallet is wrapped with a 0.20mm plastic bag 246). Like okoume, sapele is made into plywood at mills all over the world, and panel quality ranges from calamitous to surpassing. He said the price difference between that and the bending ply was approximately $2.00 cheaper per 4x8 panel. Meranti plywood is a good, economical choice. In the rare instance you find such an imperfection, do not use the panel. Stick with the A-A variety, which means both face veneers are reasonably clear. It has to do with managing moisture content, veneer orientation, and veneer thickness. Theres good BS 6566 and lousy BS 1088. While made of the same glue and tropical hardwoods, BS 6566 or BS EN 315 panels are described as exterior rather than marine grade. More blemishes in the face veneers, larger core voids (if filled), and mixing of species is permitted. Some boats were even designed around 4 12 or 4 16 panels. The construction was conventional and fastidious, the sort of clean job for which Patricks Choptank Boatworks has earned a solid reputation on the East Coast. Veneer quality is the primary difference between marine plywood and the stuff at the home center. They are not for direct exterior exposure. How do you perform the Flex and Look Test?

The RevolutionPly panels should be installed with the label facing down towards the structural subfloor. The glued-lapstrake plywood boats of Iain Oughtred or John Brooks, for example, are an excellent fit for sapele. (Okoume requires about 70 years from planting to harvest.). The veneer has a lovely fudge-ripple-swirl figure that most find irresistible under varnish. While this was once open to some debate, in 2017 it almost goes without saying that marine fir plywood should be sealed in fiberglass or epoxy or both. Please Login or Register. There isnt a Lloyds agent standing on the assembly line with a clipboard, so bad stuff can slip through, but the bump in quality of BS 1088 panels with the Lloyds Register stamp is pronounced. Thinner panels, such as the 4mm thickness common in kayaks, tend to strain the BS 1088 standards if marked as such; Ive never seen a single thin panel of meranti that I liked. This will be a fairly long read, so I apologize, but it very well may be worth your time if you are looking for 1/8" birch plywood. Although 5 10 panels are common in Europe, Ive yet to see any on these shores that were up to standard, or for which I was willing to pay the high shipping costs. Our preferred method is to lightly butt the panels together for a patch-free installation.

Blocking and bracing is recommended if you are installing directly to studs, as there may be some flex in the wall panel surface. Research the reputation of the plywood mill and the supplier before you buy. Right now, U.S. builders have a binary choice: domestic marine fir thats heavy and must be painted, or imported plywood with a tropical provenance that makes some conservationists uneasy. To qualify as marine plywood, a panel must have no voids. Ribbon-stripe plywood uses such sliced veneers, although theyre narrower still, and taken from quarter-sawn logs. Loading Quantity 20'GP-8pallets/22cbm, 40'HQ-18pallets/50cbm Nevertheless, Vendia Marine Plank may point the way to the future of boatbuilding plywood: local species sliced into high-quality panels in small, artisanal batches. And count on fiberglassing and painting the plywood. MOQ 1x20'FCL I stumbled upon a product made by Columbia Forest Products (locations throughout the East coast). In my experience MDOs hard phenolic surface is bloody awful to sand, so its use should be restricted to sheathing jobs requiring a minimum of patching and fairing. It will be either phenolic resin or melamine. It requires a razor-sharp new cutting bit in the CNC machine at Chesapeake Light Craft. Okoume and epoxy belong together like beer and pretzels. Using okoume as a core material in epoxy-composite assemblies results in wondrous feats of engineering: dinghies that weigh 80 lbs, kayaks that weigh 40 lbs, canoes that weigh 30 lbs. Reach out to us here. Apply self-leveler to the structural subfloor or existing floor prior to the installation of the RevolutionPly panels. An Awlgrip primer and LPU paint finished the job. Meranti is denser and some 10 percent heavier than its competitor, okoume, and a little stronger. The Magazine for Wooden Boat Owners, Builders and Designers. Go to Patriot Timber's Flex and Look Test Page to see the 4 simple steps or to watch a short video. Click here to remove banner ads from this forum. For strength and durability the 19'6" Rescue Minor was planked with expensive 18mm sapele marine plywood over a male mold, then righted for decking and trim. Resplendent in dark blue, the Rescue Minor slid into the Chesapeake and the delighted owner moved the boat to a lift on his dock. Patrick is well familiar with marine plywood: before opening his own shop, he had worked through mountains of the stuff as a staff boatbuilder at my own firm, Chesapeake Light Craft. Glued-lapstrake boats built of Vendia Marine Plank are strikingly handsome with a clear finish. 1.5 finishing nails, 4d ring shank paneling nails, or x 1.5 narrow crown staples are recommended. Vendia, a plywood made of Finnish pine, is the newest thing on the plywood market. It has the characteristically redolent grain of sapele; there are no core voids and certainly no delamination; the face veneers are blemish-free, if a little thin, and its sapele all the way through. Okoume was the stock in trade when I joined the nascent Chesapeake Light Craft in 1994. In 2010 Patrick Mertaugh, a professional boatbuilder, was commissioned to build a plywood powerboat to William Atkins Rescue Minor design. As of this writing it remains the only widely available domestically grown marine-grade plywood. Please note you may leave an expansion joint without seam filler when the, Better Alternative than Lauan and Meranti Plywood, For flooring and paneling applications, how long should the. ), The current relevant grade is APA PS1-09. Thicker panels (9mm and up) have a more uniform quality, perhaps because the economics of thicker panels work better for the plywood mills. Here's where I get mine, just outside of Boston. Patrick was stuck with a lost winters work, or an upwind slog through the legal system, or both. Plywood shoppers seeking some sort of safe harbor in the mayhem of the BS 1088 marketplace can look to Lloyds Register Group, Ltd. Lloyds Register is an organization that will, for a tidy fee, validate compliance with standards such as BS 1088. The exterior-grade AC fir plywood that Dynamite Payson advocated was already in precipitous decline. RevolutionPly plywood is ideal for a variety of applications, includingflooring underlayment, paneling, millwork, and woodworking projects. The $75,000 boat was a total loss. Purchased from the better mills, BS 6566 plywood is usually just as pretty as BS 1088. I'd think the lack of rigidity across the bending axis would translate to a significant loss of strength vs. traditional 1/8" ply.

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