From the start, I was determined to make All Ways look the classic she was. To me, that meant, among other things, a laid-teak deck. Hey, I had to rebuild the deck anyway, so why not make it yare? Thus began my research into ways to rebuild a fiberglass deck with a rotten core and how to construct a laid-teak deck.

First came the unglamorous task of repairing the rotten core.  After reading everything I could on the subject, I decided to combine several approaches. For the deck, I elected to use the doughnut approach. The first step was to tap out the entire deck with a plastic hammer, marking the areas that would need repair. That was both sidedecks and a goodly section of the foredeck. Then I began cutting circles out of the marked areas. In all, I cut more than 200 circles, each 3 inches in diameter and each carefully numbered to allow replacing in the original location. The holes were placed on an approximate 6-inch grid so nearly 50 percent of the deck surface was removed.

While the remaining exposed core dried out, I cut 200-plus circles of new core from sheets of Airex foam using the same hole saw. Note that although the old core was 1/2-inch thick, I used 3/8-inch Airex to allow for the thickness of the epoxy used to glue them in place on top and bottom. After flooding the remaining core with acetone and allowing it to evaporate overnight, I was ready to reassemble the deck. I used West epoxy mixed to a peanut-butter consistency with 404 filler for strength and microballoons for volume and weight reduction. Using a 1-inch-wide spatula, I forced this goop into the recess cut around the perimeter of each hole. I then buttered each foam circle, pushed it in place, buttered the previously removed circle of top skin (from which all core had been removed), and set it in place weighing down the whole mess with plastic grocery bags filled with sand.

After the epoxy kicked, I sanded the decks with 30-grit in a belt sander, removing all paint and gelcoat. I faired any major voids - where a disk was cockeyed, and so on - with a commercial polyester-based fairing compound. (Note that polyester does not stick well to epoxy, but I was just applying it to the original fiberglass. Since I intended to apply additional layers of fiberglass using polyester resin, it was the proper choice here.)

I then built up the original deck with one layer of bi-ply and two layers of mat to create a smoother, waterproof base for my laid deck. This was laid up with isophthalic polyester resin with the top coat cured by covering with plastic. (Polyester is an air-inhibited resin that never fully cures if exposed to air. This is great for building up layers as all bonds are primary (chemical), not secondary (mechanical), but you must exclude air from the final layer either by using a finishing resin which has wax added or by covering with plastic while it cures.) The deck at this point was very solid with minimal flex and no voids. After thorough drying, the smooth finish was sanded with 30-grit in a belt sander to create a good tooth for the epoxy that would hold the laid deck on.

This is a manufactured wood substitute that is 50 percent wood and 50 percent polyethylene, both recycled (plastic bags and sawdust). It's produced by Mobile Corp. and used primarily in 2 x 6s for outdoor decks around pools and such. It has a 25-year guarantee against deterioration and meets the Americans with Disabilities Act rating for non-skid with no treatment - even when wet. (This act specifies everything from how steep an access ramp can be to how non-skid is measured for public areas like swimming pool decks. -Ed.)

It weathers to a natural silver-gray that is very similar to untreated teak. There is also a brown version, but the color is not
very stable from batch to batch and fades unevenly, so I would not recommend it. Trex can be cut, drilled, and sanded with regular woodworking tools, and although most things won't stick to it, epoxy glues it well. In the last few years, since I chose Trex for my deck, several similar products have come on the market, one of which uses cedar for the wood. I do not have any experience with these and so cannot recommend them, but you might want to research the expanded possibilities if you choose to follow this path.

Several elements enter into the design of a laid deck. (See Chapelle's, Boatbuilding, for a discussion of traditional laid-deck
planking.) Features may include a wide cover board at the sheer, a king plank at the centerline, and nibbing pieces wherever planks will run into another structure at an acute angle. The planks themselves may be laid straight (parallel to the centerline) or sprung to the sheer. Rectangular structures, like cockpit seat hatches, can just be laid with straight planks or have edge boards that meet at a 45-degree angle, or are butted, and these edge boards may be the same width or slightly wider than the planks. Likewise, the edges of cabinsides and cockpit coamings can have a nibbed margin, or a wide plank can be cut to the curve. Each boat will require different options, depending on how it looks to the owner.

The screws are initially left loose so the outer edge of the next board can be slipped under them. Once the inner edge of that board is secured loosely, the screws along its outer edge are tightened down. This is repeated, ad nauseam, for each plank. The midline end of each plank must initially be cut square and carefully positioned along a line parallel to the centerline and spaced out several inches to create the appropriately shaped king plank. A screw placed at the end will aid in repositioning the plank later.

For reasons that will be obvious after the nibs are cut, this screw should be placed about 1/4 inch in from the outer edge. Once all of the planks are laid for one side of the deck, the ends must be nibbed for the king plank and margin boards, which are fitted later. Alternatively, the planks can be butted port and starboard, creating a herringbone pattern, but I don't think it is as attractive, and it requires working on both sides of the deck at once.

This is not a problem with sheet-metal screws. The screws should penetrate the outer skin but stop within the core. I used #8 5/8-inch screws, which create the correct 1/8-inch seam. If the screws are too long, double washers may be used when dry fitting. It is important to set the torque on your screwdriver so it can start the threads but will not crush the Trex or squeeze out all of the glue. Once half the deck is dry-fit, and screwed down, it's time to take everything back up.

First number each board so you can put it back in the same place. Also, mark the location of each screw on both sides of each board. Sand the deck surface with 30-or 40-grit to create a tooth for the epoxy to grip. Decide how many courses you can lay at a time and mix up enough epoxy to wet out both the fiberglass and the Trex.

As you position each board, use an awl to locate the screw holes and re-insert the screws. If you use the awl to locate and mark one hole and then locate the next hole, you can insert the awl in the second hole to force and hold the plank into place while you insert the screw in the first hole. Once again, you insert the screws loosely until the next plank is slipped under and secured and then go back and tighten them down. This time, however, you must spray the screws and washers with non-stick kitchen spray (Pam, or something similar) to prevent their being glued in by the epoxy. I put them in a shallow container and sprayed away while shaking them about, to be sure they were well coated.

It is important to remove all the screws the next morning as the epoxy will not have reached maximum strength yet, and you will be more successful with any screws that were not adequately coated with non-stick. This is where the square drive is a real must. It allows you to walk the screws right out. If one gives you a hard time, try tightening slightly first. If that doesn't work, try hitting it with a hammer while twisting. Heat will release the epoxy, but it will also burn or even melt the Trex, so I do not recommend it except as a last resort. If you do use heat, be careful, and be prepared for repairs.

After all seams are filled, don your mask and begin sanding. Epoxy dust is extremely toxic and a particulate face mask is mandatory whenever sanding epoxy. Use 80-grit in a belt sander, and sand everything flush. If the epoxy seams are quite proud of the Trex, or if the Trex is uneven, you can sand at right angles to the planks for the initial leveling, but final sanding should be parallel to the planks. You will undoubtedly find a few areas in the seam that remain shiny, indicating that the epoxy is below the level of the surface you sanded. As long as there are no holes through to the core, you can either re-rout, refill, and resand, or tolerate the shininess; it will fade with time. Another option for small areas is to hand sand, with a folded piece of sandpaper to dull the surface. At this point you are either done or almost done. The scratches left from the 80-grit leave a grain pattern in the Trex that can please the eye and increase the non-skid value. Alternatively, the deck can now be sanded with a random-orbit sander and 80-grit to create a smoother surface, which still has good non-skid properties. The rougher surface will catch more dust and dirt and require more frequent hosing off.

Cut all planks square, and lay them so that the foremost outboard corner lands exactly on the scribed line (fig b). Be sure spacing is exactly 1/8 inch. The planks will run parallel to the sheer. A straight edge across the corresponding plank corners should be
perpendicular to the centerline of the king plank.

Make a nib-marking tool from scrap wood (illustration in use in photos c-e). It should be about 4 inches long (exact length not critical). Assuming you are using 1 1/2-inch planks, make the piece 5/8-inch wide, then cut away 1/8 x 1/2 inch along one edge, leaving a 1/8 x 1/8-inch edge. The critical thing is that you have a 1/8-inch ridge for the seam, and that the shelf that remains is 1/3 of the width of the plank. The thickness is not critical, but 1/2 inch works well. I made mine from a scrap of teak because I like nice tools, but any close-grained wood will do.

Starting at the aft end, place the marking tool in the seam between the innermost plank and the next, flush with the end of the first plank. The 1/8-inch ridge fits in the seam. Make a mark along the edge of the tool that will be 1/2 inch from the outer edge of the plank (fig c). Fine lines are again important. Use a very sharp pencil or marking knife.

Before moving the tool, also mark the inner edge of the next plank (fig d). This line will be a projection of the outer end of the first plank. Move forward to the seam between the second and third plank and repeat.

Use the edge of your tool, or a straightedge, to connect the second mark (at 1/2 inch) with the first mark you made on the second plank (fig e). (On the first plank only, the inner mark will be where the inner aft edge of the plank intersects the guideline.). For all others, the point will be the projection of the previous plank's edge, which is actually slightly outboard of the line. See illustration above.) This is the line you cut for the nib. Repeat for each plank as you move forward. Cut all planks and glue down.

Lay a piece of paper over the entire length of the space where the king plank will be (fig f). I used a roll of butcher's paper, which is excellent for making patterns. Be sure the shiny side is down and secure in place with tape to prevent movement. Rub all the edges of the planks through the paper with your thumb. This is known as the dirty finger technique. A little of the carbon powder works well also. You don't want to press down into the void under the paper, just pick up the sharp edge of the planks.

Remove the paper and carefully cut along the marks (fig g). Test fit the pattern in place and trim or shim as necessary. Transfer the pattern to your king plank. An easy way to do this is to tape the pattern in place and then use a fat-tip marker to straddle the edge of the paper, marking on both the pattern and the board (fig h). When the pattern is removed, you will have a nice sharp line. (Photo shows paper slightly moved aside.)

Cut the king plank to fit. If you are confident in your markings and the width of your blade, you can cut inside the lines, as you
eventually want the king plank to have a 1/8-inch seam all around it. On the other hand, it is far easier to cut it twice than it is to
stretch it, so if the first cut is without seam allowances, you can use your marking tool to mark the 1/8-inch seam allowance during the test fit. Remember to leave this line when you make the final cut. Finally, glue the king plank down, holding it in place with the screws at the end of each plank and weights along the center (fig i).

fig a	fig b	fig c
fig d	fig e	fig f
fig g	fig h	fig i

A process such as this will be controversial. It closely follows a process published by Gougeon for laying teak. System Three does not recommend using a thickened graphite/epoxy mixture to fill the expansion joints between the teak strips. They recommend using their epoxy for gluing teak down and polysulfide compound for filling the gaps between the planks. Their concern is with the expansion properties of teak, which is not sealed with epoxy on top. The issue is that epoxy between the planks will not be flexible enough to allow for expanding and contracting. The partners at MAS Epoxies, like Gougeon and System Three, have experience gluing teak, but have concerns about using Trex because they are unfamiliar with it and
because they know epoxy will not bond to the polyethylene in the Trex without very specialized pretreatment. They recognize that epoxy will bond to the wood in the Trex. The folks at Westcoast Teak Products Ltd., who lay teak decks do not use epoxy. They prefer two polysulfide compounds, one for gluing the strips down and one for filling the gaps between them. All of these people are being cautious, as they rightly should be. They have experience with teak but not with Trex.

The deck described here is not teak, and as careful as Mark Parker has been in developing this process, it is a new process with only one satisfactory season of proven use. Mark is betting on a satisfactory outcome. Sailors familiar with traditional teak over fiberglass decks with screws and plugs realize that method of construction can have serious problems when the wood wears, the plugs fall out, and leaks through the screw holes start.

We are offering this article to you the way Mark offered it to us. It looks like an interesting alternative way to lay a "wood" deck. If you consider doing this, you will certainly want to make a thorough and independent evaluation of the method and perhaps follow up with Mark to see how his deck is doing. Either way, our hats are off to Mark for taking the process this far. We needed a better way. Maybe this is it. - (Ed. Good Old Boat)

Mark Parker, M.D., is director of the Emergency Care Center at The Cheshire Medical Center in Keene, N.H. He's been sailing since college - Sunfishes, Lasers, Hobie Cats. His work on a 16-foot trimaran, a "work in progress," was temporarily sidelined when the Pearson Triton, All Ways, received a higher priority rating. Mark sails with his family on Narragansett Bay.