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Not all marine plywood is imported from Africa and Southeast Asia. RevolutionPly plywood is certified for points toward ICC-700 National Green Building Standard (NGBS). Most of the sapele that finds its way to the United States is harvested in Cameroon. It requires a razor-sharp new cutting bit in the CNC machine at Chesapeake Light Craft. 1.5 finishing nails, 4d ring shank paneling nails, or x 1.5 narrow crown staples are recommended. In 2010 Patrick Mertaugh, a professional boatbuilder, was commissioned to build a plywood powerboat to William Atkins Rescue Minor design. A few minutes on the Internet will give you some idea of the quality, reliability, and sustainability of your chosen marine plywood source. The screw you choose should not penetrate through the bottom of the subfloor.

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. 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 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. Independent of the FSC chain of custody rating, Joubert also holds a PEFC (Programme for the Endorsement of Forest Certification) rating, a strict European standard for sustainability. Still have a question not answered? Ribbon-stripe plywood uses such sliced veneers, although theyre narrower still, and taken from quarter-sawn logs. Apply self-leveler to the structural subfloor or existing floor prior to the installation of the RevolutionPly panels. Its impossible to talk about marine plywood without a clear-eyed discussion of the classification system. 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. Most meranti is a better fit with the BS 6566 stamp. It is heavier and stiffer than its closest competitor, okoume.

RevolutionPly panels are designed for interior applications only. Within a week came big trouble. Once upon a time, it was common to order marine plywood in lengths greater than 8. 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. Its appropriate for interior bulkheads, engine boxes, cockpit soles, and so on. Its a cousin to lauan. 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. First lets cover the basics of plywood. It must also be assembled using a durable glue, and must pass rigorous testing for longevity. Thicker panels (9mm and up) have a more uniform quality, perhaps because the economics of thicker panels work better for the plywood mills. Lloyds Register Type Approval is not available for 6566 and its equivalents. Loading Quantity 20'GP-8pallets/22cbm, 40'HQ-18pallets/50cbm Sapele is a tall deciduous tree, a relative of African mahogany.

Like most, this is a voluntary standard, though in my experience the domestic marine fir is uniformly high quality. An Awlgrip primer and LPU paint finished the job. Nowadays its unusual for suppliers to stock sheets larger than 4 8 (1.23 meters 2.5 meters). We use BS 6566 okoume selectively at Chesapeake Light Craft without issue. The pulling boat below is made of it. Resplendent in dark blue, the Rescue Minor slid into the Chesapeake and the delighted owner moved the boat to a lift on his dock. Do not use drywall screws. Set it aside, and contact Patriot Timber Products immediately for a resolution. All veneers are Douglas-fir or western larch. Its available now only with sliced veneers, and rated for cabinet making. plywood bendable With the delamination not confined to a single area or a particular sheet or thickness of plywood, the owner and the boats horrified builder grasped the grim truth: The entire shipment of plywood was faulty, and the damage beyond repair. While classified as a hardwood, its soft, flexible, and very light. This includes stringent chain of custody rules that begin with each individual tree, the health of communities nearby, the welfare of workers, and so on up the line until the plywood arrives in the United States. It was developed as a weatherproof material for the manufacture of highway signs, and it does indeed take paint well and is durable. (Epoxy and fiberglass stick to the phenolic coating just fine.). It will be either phenolic resin or melamine.

Heres what I can tell you, based on my 20-year relationship with the French mill Joubert, Chesapeake Light Crafts main supplier. Reach out to us here. plywood flexible bending low larger Ask to see a sample of a scarf joint before emptying your wallet. Two summers ago I started the search for my plywood, that could be found anywhere in the top half of Maine, without breaking the bank. While much of the marine plywood used today originates in the forests of equatorial Africa, all of the veneer is dried elsewhere, mostly at mills around the perimeter of the Mediterranean. The exterior-grade AC fir plywood that Dynamite Payson advocated was already in precipitous decline. 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. plywood hardwood marine wbp formwork shuttering combi concrete sales Again, his name is Austin Bartlett. The queasy reality is that if it can happen to him it can happen to me and you. When I spoke to U.S. State Department officials with experience in equatorial Africa, they said that the European mills like Joubert were doing it right (their words) in terms of sustainability, though more work remains to ensure that citizens in places such as the Congo Basin share in the wealth generated by the industry. Vendia, a plywood made of Finnish pine, is the newest thing on the plywood market. The veneers are sprayed with glue, stacked up with the grain of each layer at 90 degrees to the next, then squashed in a heated press for a few minutes. The paper coating gives the normally rough fir face veneers a smooth, hard, paint-ready surface. Contemporary plywood hulls can be elegant and refined. Weve even cut airplane parts out of it. Its not very durable, but judicious use of fiberglass and epoxy will take care of that. Welcome Guest. (The U.S. equivalent would be ANSI, the American National Standards Institute.). One example is Vendia of Finland, who offer an unusual sliced veneer plywood made of slow-growing Finnish pine (see review, WB No. Click here to remove banner ads from this forum. Ive had trouble with the grain of its face veneers tearing when cut. The prospective plywood boatbuilder of 2017 wades into a thicket of unenforced standards, uneven quality, and outright flim-flammery. It grows in close stands, the trees reaching a height of over 100, the trunks thick and straight. For devoted conservationists, logging in delicate ecosystems for profit is a curse upon the land and the people who dwell in it. The response of the importer who sold Patrick the plywood added to the dismay: their warranty, they vowed, extended only to refunding the cost of the plywood, and nothing more. Blocking and bracing is recommended if you are installing directly to studs, as there may be some flex in the wall panel surface. Let us all know how it all works out Theresa God grant me the strength to restore the trailers I can. Its expensive, so if youre committed to using sapele, look for the Lloyds Register Type Approval. Gaps in the inner pliesso called core voidsare one of the qualities that separate good plywood from the mediocre stuff. The trees are selectively harvested; foresters locate trees with a GPS. (For those keeping track, the new equivalent is BS EN 315.) 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. Glued-lapstrake boats built of Vendia Marine Plank are strikingly handsome with a clear finish.

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. It aint pretty. RevolutionPly plywood contains no tropical hardwoods or species from endangered forests. As of this writing it remains the only widely available domestically grown marine-grade plywood. As the most popular of the tropical imports, okoume is available in a large variety of thicknesses, from 1.5mm up to 18mm. I stumbled upon a product made by Columbia Forest Products (locations throughout the East coast). Plywood quality varies depending upon its intended use, and builders should be well acquainted with grading standards. PS1-09 places major restrictions on face veneer repairs and core voids in plywood labeled Marine A-A.. Balancing the sheets in the factory so that they dont warp is tricky, so you should watch out for unstable panels. plywood flexible bending low larger Modestly good underlayment-grade lauan plywood could still be had, but the paper-thin face veneers and crumbly core that distinguishes lauan today would be the norm by the early 1990s. 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. Sapele is more expensive than both meranti and okoume, but its grain is more appealing. RevolutionPlyplywood should be fastened every 6 on center along the panel ends and edges and 12 on center over wall studs in the panel field. Equatorial Africa is damp, and plywood made there would warp the moment it arrived in a less humid climate. A great deal has changed in the world of plywood since those masters of the medium made the recommendations quoted above. RevolutionPly plywood is ideal for a variety of applications, includingflooring underlayment, paneling, millwork, and woodworking projects.

phenolic 18mm grade shuttering formwork JH. 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. Flexing the panel will help to reveal any delamination or core imperfections. 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 Some boats were even designed around 4 12 or 4 16 panels. phenolic 18mm grade shuttering formwork Aucoumea klaineana is an African hardwood found in the Congo Basin. Once a particular stand has been harvested, loggers may not enter that area again for 25 years. Stick with the A-A variety, which means both face veneers are reasonably clear. Go to Patriot Timber's Flex and Look Test Page to see the 4 simple steps or to watch a short video. Thicker plywood takes longer to cure. Built-in order protection service in alibaba.com. At the moment its the only homegrown marine ply on the market, with our own American Plywood Association minding the standards. In the rare instance you find such an imperfection, do not use the panel. Excessive or illegal logging and the fact that some Dipterocarpaceae species are endangered has led big-box stores such as Home Depot and Lowes to limit its use in the United States. The glued-lapstrake plywood boats of Iain Oughtred or John Brooks, for example, are an excellent fit for sapele. The, No. In other words, its perfect for peeling into plywood veneers. I started building boats in the 1980s. Designers always specify an epoxy or fiberglass coating. Most plywood is rotary cutthat is, it is made from long sheets of thin veneer peeled from straight logs. The best imported marine panels will have face veneers without blemishes, patches, or seams in the veneer. No more than 7 percent of the okoume in the forest may be taken annually, a number chosen to ensure sustainability indefinitely. 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. RevolutionPly panels should acclimate 24 to 48 hours in a climate controlled home environment of approximately 70 degrees Fahrenheit. Trapped water will turn okoume into mulch, and soon. All the veneersin RevolutionPly plywood come from plantation and sustainable wood sources. 246). BS 1088 is the coin of the realm, the sine qua non of plywood grades. RevolutionPlyhas a consistent appearance from piece to piece, a blemish-free face, and has the best packaging in the industry. To correctly secure RevolutionPlypanels to the subfloor,the minimum spacing requirement between each fastener is every 4 on center in the body of the panel and every 2 along the panel perimeter. Please Login or Register. 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. The phenolic glue is black and will show up more readily if you sand into it. For heavier boats that wont be varnished, marine-grade fir plywood continues to be a sound choice. Possibly the best current source for birch ply, from Northern Maine ~ Proud new owner of Lola, a 1960 Shasta Airflyte and Pearl, a 1962 Mobile Scout. A cubic foot weighs just over 25 lbs. 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. The Magazine for Wooden Boat Owners, Builders and Designers. Please note you may leave an expansion joint without seam filler when theRevolutionPlypanels are installed under carpet, engineered floors, or wood floors. Yes. If a self-leveler is needed, it should never be applied on top of the RevolutionPly plywood. for Bending plywood poplar bendable plywood lowes price. The seams were sheathed in fiberglass and the entire boat was coated inside and out with epoxy. 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. 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. The face veneers feature abrupt transitions between hard and soft grain, which makes a smooth surface difficult to achieve without a stabilizing coating of epoxy. The RevolutionPly panels should be installed with the label facing down towards the structural subfloor. Likewise, fir is notorious for checking as soon as you get it outdoors.

Engine and gear were retrieved from the ruined Rescue Minor, and the following winter Patrick built the client another Atkin powerboat. 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. MDO, or Medium Density Overlay plywood, has a layer of paper bonded to one or both surfaces, impregnated with phenolic resin. How do you perform the Flex and Look Test? Our preferred method is to lightly butt the panels together for a patch-free installation. Its really heavy. In my experience both are equally durable. Construction adhesive can be used in conjunction with fasteners (nails, narrow crown staples) in order to properly secure the panels. For now, Vendia is expensive and hard to get in the United States, and it comes in unusual sizes (16 100 is one option). 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. Yes, you can use coated flathead wood screws. It is strong and stable, like all plywood, but because it's made from sliced rather than peeled veneer it resembles solid wood. plywood bendable Nearly all marine plywood is made by peeling a giant continuous sheet of veneer off a spinning log, like tissue paper off a roll. 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. I'd think the lack of rigidity across the bending axis would translate to a significant loss of strength vs. traditional 1/8" ply. 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. At the end of the production line, the plywood is trimmed and stacked for shipping. Now officially retired, BS 6566 persists as a recognized standard for slightly lesser plywood. RevolutionPly plywood is a higher quality panel than Meranti plywood and Lauan/Luan plywood. It has a dark color sometimes resembling walnut. Glue for marine plywood is a settled science. No. 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. Gluing underlayment panels to the subfloor can cause problems such as a tack and release floor that crackles when you walk across it. Its changed very little in 50 years, and the quality is uniformly good. There are no BS 1088 police was a line I heard repeated by several different suppliers. (Okoume requires about 70 years from planting to harvest.). Okoume is the easiest to bend of the popular marine plywoods. The veneer has a lovely fudge-ripple-swirl figure that most find irresistible under varnish. RevolutionPlyplywood is manufactured from plantation and sustainable wood sources and is a far betteralternative to Meranti plywood and Lauan/Luan plywoodthat originates from poorly managed tropical rainforests. Average and better marine plywood will be free of core voids. 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. The important thing to understand is that it is a voluntary standard. 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. Durability is not okoumes strong suit. As my purchases grew from a hundred sheets, to multiple pallets, and eventually to entire shipping containers of okoume, I sometimes found myself in the same spot as Patrick Mertaugh at Choptank Boatworks (see sidebar, A Plywood Horror Story,) I could specify internationally recognized standards for my marine plywood, such as the exalted BS 1088 (see below), yet receive a shipment of plywood not fit for drawer bottoms. Douglas-fir marine plywood is strong and rot resistant, but due to its unstable grain is a poor choice for fine finishing unless sheathed in fiberglass. Like okoume, sapele is made into plywood at mills all over the world, and panel quality ranges from calamitous to surpassing. 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. Its worth a few more bucks. Yes. 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. table folding legs industrial northern tables lowes tools 1713 leg collect later remember saw week previous It has to do with managing moisture content, veneer orientation, and veneer thickness. By law, no okoume logs may leave the country. Research the reputation of the plywood mill and the supplier before you buy. table folding legs industrial northern tables lowes tools 1713 leg collect later remember saw week previous This will eliminate potential flooring issues resulting from insufficient and incorrect fastener placement. Plywood with sliced veneers has faces assembled from several narrower widths, cut like sliced cheese from one-half of a split log. Never attach, glue, or adhere theRevolutionPly panels to the subfloor with any type of adhesive. Strong for its weight and with a pleasing honey-colored grain figure, okoume is a heaven-sent choice for lightweight stitch-and-glue boats. SO, I did just get off the phone with Austin at Columbia Forest Products. RevolutionPlyplywood can be installed directly to wall studs as well as placed over a solid wall surface such as existing sheetrock, paneling or other wall covering. British Standards are issued by the BSI Group, which operates under a Royal charter and administers national standards for British manufacturers. Almost any one of those features would disqualify plywood from use in my shop, and it illustrates the variability of quality permitted under the standard. The melamine glue is somewhere between clear and milky-white, and some builders prefer this for panels in which sanding might reveal the glue lines. (The veneers are shipped to the southwest of France for drying and assembly.

Our preferred method is to lightly butt the panels together for a patch-free installation. And count on fiberglassing and painting the plywood. 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. In addition, gluing the underlayment panels to your structural subfloor will eliminate the opportunity to remove the underlayment for a future floor replacement. How did Patrick, a professional boatbuilder with lots of marine plywood experience, suffer such a spectacular swindle? I'd really hesitate to use bending plywood for the walls or ceiling. 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. Meranti belongs to the family Dipterocarpaceae, lowland rainforest trees that are native to Southeast Asia. ), The current relevant grade is APA PS1-09. Okoume and epoxy belong together like beer and pretzels. We are pleased to bring you the following RevolutionPlyplywood related frequently asked questions.

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. They make what they call Purebond Radius Bending Plywood, I forgot to put the contact information. Stability is the secret recipe of a plywood factory, said Michael Geoffroy, of the French okoume specialists Joubert, and thats about all he would tell me. So, I'm "stuck" with the bending ply (which he said is till quite a "stout" piece of plywood) but you absolutely call or email him, have him send you a quote, and place a special order through ANY Home Depot store nationwide, for either the bending ply or a regular 1/8" birch plywood. That one was strip-planked. Lots of great choices remain, but you cant simply judge marine plywood by its stamp. Which side of the panel goes face down in flooring underlayment applications? Watch out for overlaps of the core veneers, which create weak spots and cause an ugly crease in the surface veneer. So how do you find the good imported stuff? How sustainable are okoume, sapele, and meranti? More on shipping and other trade services. Here's where I get mine, just outside of Boston. Even if you could find a panel not riddled with core voids, it would be warped like a potato chip. Theres good BS 6566 and lousy BS 1088. His number is (800) 438-6069 ext. Rotary-cut veneers are dried with great care to a moisture content of less than 8 percent. Use fir marine plywood for heavy boats that need to be strong and rot-resistant, and dont have a lot of tricky bends. John C. Harris designs, builds, and writes about boats at Chesapeake Light Craft in Annapolis, Maryland. I once ordered some 4 16 plywood and received two 8-footers joined by an arrestingly ugly glued scarf. As you research your options, take a moment to reflect: This stuff really does grow on trees. It also allows dutchmen to fill gaps in the face veneers, which may be as thin as 0.5mm in 4mm plywood. Meranti is denser and some 10 percent heavier than its competitor, okoume, and a little stronger. They are not for direct exterior exposure. 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. Soon the bubbling had spread to the hull. Speaking as someone whos cut up more marine plywood than most, theres nothing about that small sample to suggest fraud. Plywood made of such veneers is known as rotary-cut plywood. Consult the designer before swapping species. In order to attain the level of form and finish seen here, a builder must be careful in choosing stock. In spite of the boats impermeable epoxy coating, the veneer in the 12mm sapele plywood deck began lifting in the hot Maryland sun. To qualify as marine plywood, a panel must have no voids. Make sure the screw selected has a minimum 3/16 diameter head. Okoume was the stock in trade when I joined the nascent Chesapeake Light Craft in 1994. A lamentable amount of plywood no better than home center underlayment is advertised as BS 1088, with unflinching villains ready to sell the stuff to bargain-hunting boatbuilders. The companies that have been around a long time have a track record of consistent quality. Jouberts okoume comes from the country of Gabon, whose government exercises unusual caution and oversight in extracting the resource. Some Lloyds Register marine panels will fail the most basic tests. Starting at 14 (6mm) thickness, the imported varieties will have five veneers or more. Patricks understanding and resourceful customer declared force majeure instead of unleashing lawyers. Well start with domestic marine fir, as its an easy one. I wished Id done it myself. A few suppliers will make up long panels to order, sparing you the trouble of sharpening your plane and cutting scarf joints. Veneer quality is the primary difference between marine plywood and the stuff at the home center. Plywood in which veneer species are mixed, or in which face veneers are too thin compared to the cores, are especially susceptible to warping. We do not warrant our underlayment panels that have been glued to the subfloor. He said he can accept either phone calls or emails, but he prefers to speak over the phone to be sure there is no miscommunication. If you want to make plywood, your veneer mill has to be in Gabon, where it can benefit the local economy. Not all mills and not all species enjoy such protections, and plywood from good, certified outfits is a lot more expensive. It looks just fine! The color ranges from blond to reddish-brown, sometimes within the width of a single face veneer. 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. The $75,000 boat was a total loss. ), A single, privately owned 600,000-hectare (about 2,300 sq miles) forest yields 90 percent of Jouberts okoume. Jouberts plywood has the highest level of certification offered by the Forestry Stewardship Council. Purchased from the better mills, BS 6566 plywood is usually just as pretty as BS 1088. MOQ 1x20'FCL Okoume is the most common choice for small-boat construction: it is soft, flexible, and light. 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. 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.

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