Yes. A few suppliers will make up long panels to order, sparing you the trouble of sharpening your plane and cutting scarf joints. As the sidebar on page 42 illustrates, the stamp on the plywood doesnt always correlate with the advertised quality. It also allows dutchmen to fill gaps in the face veneers, which may be as thin as 0.5mm in 4mm plywood. Still have a question not answered? Aucoumea klaineana is an African hardwood found in the Congo Basin. 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. As the most popular of the tropical imports, okoume is available in a large variety of thicknesses, from 1.5mm up to 18mm. Once upon a time, it was common to order marine plywood in lengths greater than 8. Most of the sapele that finds its way to the United States is harvested in Cameroon. 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. I stumbled upon a product made by Columbia Forest Products (locations throughout the East coast). 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. Like okoume, sapele is made into plywood at mills all over the world, and panel quality ranges from calamitous to surpassing. The glued-lapstrake plywood boats of Iain Oughtred or John Brooks, for example, are an excellent fit for sapele.

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. plywood hardwood marine wbp formwork shuttering combi concrete sales Designers always specify an epoxy or fiberglass coating. The trees are selectively harvested; foresters locate trees with a GPS. British Standards are issued by the BSI Group, which operates under a Royal charter and administers national standards for British manufacturers.

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. JH. (The U.S. equivalent would be ANSI, the American National Standards Institute.). Do not use drywall screws. All the veneersin RevolutionPly plywood come from plantation and sustainable wood sources. We are pleased to bring you the following RevolutionPlyplywood related frequently asked questions. Okoume and epoxy belong together like beer and pretzels. It grows in close stands, the trees reaching a height of over 100, the trunks thick and straight. It is heavier and stiffer than its closest competitor, okoume. At the end of the production line, the plywood is trimmed and stacked for shipping.

Even if you could find a panel not riddled with core voids, it would be warped like a potato chip. Glued-lapstrake boats built of Vendia Marine Plank are strikingly handsome with a clear finish. 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 have found the easiest method is to heat the label with a hairdryer prior to removal. 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. Its a cousin to lauan. Apply self-leveler to the structural subfloor or existing floor prior to the installation of the RevolutionPly panels. 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. This veneer is sprayed with glue and stacked to form a panel, with each layer laid with the grain oriented 90 degrees to the previous one. We use BS 6566 okoume selectively at Chesapeake Light Craft without issue. The phenolic glue is black and will show up more readily if you sand into it. Make sure the screw selected has a minimum 3/16 diameter head. Lloyds Register Type Approval is not available for 6566 and its equivalents. 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. An Awlgrip primer and LPU paint finished the job. Veneer quality is the primary difference between marine plywood and the stuff at the home center. The color ranges from blond to reddish-brown, sometimes within the width of a single face veneer. Okoume is now so ubiquitous in small-boat construction that it scarcely needs introduction. ), The current relevant grade is APA PS1-09. Click here to remove banner ads from this forum. Its impossible to talk about marine plywood without a clear-eyed discussion of the classification system. If there is any residual adhesive, you can remove it using either Naphtha, Goo Gone, mineral spirits or by lightly sanding the area.

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. plywood birch aircraft thin woodworking pdf Stick with the A-A variety, which means both face veneers are reasonably clear. Average and better marine plywood will be free of core voids. Blocking and bracing is recommended if you are installing directly to studs, as there may be some flex in the wall panel surface. The queasy reality is that if it can happen to him it can happen to me and you. Gluing underlayment panels to the subfloor can cause problems such as a tack and release floor that crackles when you walk across it. If you want to make plywood, your veneer mill has to be in Gabon, where it can benefit the local economy. Plywood with sliced veneers has faces assembled from several narrower widths, cut like sliced cheese from one-half of a split log. RevolutionPly plywood is certified for points toward ICC-700 National Green Building Standard (NGBS). More on shipping and other trade services. RevolutionPly plywood is ideal for a variety of applications, includingflooring underlayment, paneling, millwork, and woodworking projects. 1.5 finishing nails, 4d ring shank paneling nails, or x 1.5 narrow crown staples are recommended. Okoume was the stock in trade when I joined the nascent Chesapeake Light Craft in 1994.

In spite of the boats impermeable epoxy coating, the veneer in the 12mm sapele plywood deck began lifting in the hot Maryland sun. All veneers are Douglas-fir or western larch. It will be either phenolic resin or melamine. There are no BS 1088 police was a line I heard repeated by several different suppliers. Khaya is the original African mahogany. Thirty years ago it was considered more or less interchangeable with okoume, but as the resource has dwindled it has all but vanished from the U.S. market. 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. They are not for direct exterior exposure. Glue for marine plywood is a settled science. The paper coating gives the normally rough fir face veneers a smooth, hard, paint-ready surface. Research the reputation of the plywood mill and the supplier before you buy.

Not all mills and not all species enjoy such protections, and plywood from good, certified outfits is a lot more expensive. And his email is ARBartlett@columbiaforestproducts.com That is the email address on the quote. 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. First lets cover the basics of plywood. The screw you choose should not penetrate through the bottom of the subfloor.

Yes. Ribbon-stripe plywood uses such sliced veneers, although theyre narrower still, and taken from quarter-sawn logs. 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. 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. In my experience both are equally durable. 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. Outer Packing-Pallet is covered with plywood or carton and steel tapes for strength If the glue dispenser hiccups or the plywood is hastened through the hot press, the veneers wont bond properly and the stage is set for a delamination disaster. Its appropriate for interior bulkheads, engine boxes, cockpit soles, and so on. Purchased from the better mills, BS 6566 plywood is usually just as pretty as BS 1088. It has to do with managing moisture content, veneer orientation, and veneer thickness. It requires a razor-sharp new cutting bit in the CNC machine at Chesapeake Light Craft. RevolutionPly panels are designed for interior applications only. 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. If a self-leveler is needed, it should never be applied on top of the RevolutionPly plywood. Lots of great choices remain, but you cant simply judge marine plywood by its stamp. Thicker panels (9mm and up) have a more uniform quality, perhaps because the economics of thicker panels work better for the plywood mills. A cubic foot weighs just over 25 lbs. RevolutionPly plywood is a higher quality panel than Meranti plywood and Lauan/Luan plywood. Gaps in the inner pliesso called core voidsare one of the qualities that separate good plywood from the mediocre stuff. Watch out for overlaps of the core veneers, which create weak spots and cause an ugly crease in the surface veneer. This will eliminate potential flooring issues resulting from insufficient and incorrect fastener placement. (The APA started life as the Douglas Fir Plywood Association, a name that stirs nostalgia as a source for funky boat plans in the old days. Our preferred method is to lightly butt the panels together for a patch-free installation. He said the price difference between that and the bending ply was approximately $2.00 cheaper per 4x8 panel. 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. Again, his name is Austin Bartlett. How do you perform the Flex and Look Test? Sapele is more expensive than both meranti and okoume, but its grain is more appealing. Within a week came big trouble. (For those keeping track, the new equivalent is BS EN 315.) And count on fiberglassing and painting the plywood. Its expensive, so if youre committed to using sapele, look for the Lloyds Register Type Approval. The prospective plywood boatbuilder of 2017 wades into a thicket of unenforced standards, uneven quality, and outright flim-flammery. The best imported marine panels will have face veneers without blemishes, patches, or seams in the veneer. Patricks understanding and resourceful customer declared force majeure instead of unleashing lawyers. Use fir marine plywood for heavy boats that need to be strong and rot-resistant, and dont have a lot of tricky bends.

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. Its available in a marine spec, though I suspect most of it is sold to signmakers. Now officially retired, BS 6566 persists as a recognized standard for slightly lesser plywood. 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. I once ordered some 4 16 plywood and received two 8-footers joined by an arrestingly ugly glued scarf. 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. Meranti is denser and some 10 percent heavier than its competitor, okoume, and a little stronger. 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. (Epoxy and fiberglass stick to the phenolic coating just fine.). It aint pretty. 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. In other words, its perfect for peeling into plywood veneers. Starting at 14 (6mm) thickness, the imported varieties will have five veneers or more. Never attach, glue, or adhere theRevolutionPly panels to the subfloor with any type of adhesive. 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. For devoted conservationists, logging in delicate ecosystems for profit is a curse upon the land and the people who dwell in it. SO, I did just get off the phone with Austin at Columbia Forest Products. 2330. 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. I'd think the lack of rigidity across the bending axis would translate to a significant loss of strength vs. traditional 1/8" ply. BS 1088 is the coin of the realm, the sine qua non of plywood grades. Resplendent in dark blue, the Rescue Minor slid into the Chesapeake and the delighted owner moved the boat to a lift on his dock. Meranti belongs to the family Dipterocarpaceae, lowland rainforest trees that are native to Southeast Asia. (The veneers are shipped to the southwest of France for drying and assembly. PS1-09 places major restrictions on face veneer repairs and core voids in plywood labeled Marine A-A.. 246). Strong for its weight and with a pleasing honey-colored grain figure, okoume is a heaven-sent choice for lightweight stitch-and-glue boats. Jouberts plywood has the highest level of certification offered by the Forestry Stewardship Council. Patrick was stuck with a lost winters work, or an upwind slog through the legal system, or both. 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. In order to attain the level of form and finish seen here, a builder must be careful in choosing stock. No more than 7 percent of the okoume in the forest may be taken annually, a number chosen to ensure sustainability indefinitely. MDO, or Medium Density Overlay plywood, has a layer of paper bonded to one or both surfaces, impregnated with phenolic resin. It has a dark color sometimes resembling walnut. We do not warrant our underlayment panels that have been glued to the subfloor. The veneer has a lovely fudge-ripple-swirl figure that most find irresistible under varnish. 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. Our preferred method is to lightly butt the panels together for a patch-free installation. The Magazine for Wooden Boat Owners, Builders and Designers. Okoume is the easiest to bend of the popular marine plywoods. The BS 1088 specification applies to tropical hardwood plywoodthat is to say, okoume, sapele, meranti, and a few others.

It was developed as a weatherproof material for the manufacture of highway signs, and it does indeed take paint well and is durable. So how do you find the good imported stuff? One example is Vendia of Finland, who offer an unusual sliced veneer plywood made of slow-growing Finnish pine (see review, WB No. Ask to see a sample of a scarf joint before emptying your wallet. The, No. 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. Durability is not okoumes strong suit. Its not very durable, but judicious use of fiberglass and epoxy will take care of that. 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. 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 pulling boat below is made of it. The seams were sheathed in fiberglass and the entire boat was coated inside and out with epoxy. The RevolutionPly panels should be installed with the label facing down towards the structural subfloor. I started building boats in the 1980s. Rotary-cut veneers are dried with great care to a moisture content of less than 8 percent. ), A single, privately owned 600,000-hectare (about 2,300 sq miles) forest yields 90 percent of Jouberts okoume. A great deal has changed in the world of plywood since those masters of the medium made the recommendations quoted above. It is strong and stable, like all plywood, but because it's made from sliced rather than peeled veneer it resembles solid wood. plywood flexible bending low larger Construction adhesive can be used in conjunction with fasteners (nails, narrow crown staples) in order to properly secure the panels. 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. 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. At the moment its the only homegrown marine ply on the market, with our own American Plywood Association minding the standards. Equatorial Africa is damp, and plywood made there would warp the moment it arrived in a less humid climate. Speaking as someone whos cut up more marine plywood than most, theres nothing about that small sample to suggest fraud. Theres good BS 6566 and lousy BS 1088. Please Login or Register. Let us all know how it all works out Theresa God grant me the strength to restore the trailers I can. John C. Harris designs, builds, and writes about boats at Chesapeake Light Craft in Annapolis, Maryland. 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. 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. Welcome Guest. Engine and gear were retrieved from the ruined Rescue Minor, and the following winter Patrick built the client another Atkin powerboat. phenolic 18mm grade shuttering formwork 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. Trapped water will turn okoume into mulch, and soon. 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. Its available now only with sliced veneers, and rated for cabinet making. In 2010 Patrick Mertaugh, a professional boatbuilder, was commissioned to build a plywood powerboat to William Atkins Rescue Minor design. 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. However, the address he emailed me from is ARBartlett@CFPWood.com.

Sliced and ribbon-stripe panels are common in marine grades, but are used mainly for decorative joinery. Balancing the sheets in the factory so that they dont warp is tricky, so you should watch out for unstable panels. Likewise, fir is notorious for checking as soon as you get it outdoors. I'd really hesitate to use bending plywood for the walls or ceiling. MOQ 1x20'FCL Plywood made of such veneers is known as rotary-cut plywood. 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. It looks just fine! 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. 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. Sapele is a tall deciduous tree, a relative of African mahogany. Here's where I get mine, just outside of Boston. Plywood in which veneer species are mixed, or in which face veneers are too thin compared to the cores, are especially susceptible to warping. 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. 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. 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. I wished Id done it myself. How sustainable are okoume, sapele, and meranti? Like most, this is a voluntary standard, though in my experience the domestic marine fir is uniformly high quality. 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. 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.

RevolutionPly plywood contains no tropical hardwoods or species from endangered forests. Heres what I can tell you, based on my 20-year relationship with the French mill Joubert, Chesapeake Light Crafts main supplier. Some Lloyds Register marine panels will fail the most basic tests. The result has the strength and stability of plywood but looks a lot more like solid timber. 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. Its really heavy. 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.