When cleaning out the laps, pay attention to this transition zone. It may be necessary to remove fasteners at the ends of the planks and open them slightly to clean out the seams and the rabbets. 4 Wet out the opened seam surfaces with resin/hardener mixture. Work epoxy into the seam as deeply as possible with a disposable brush or syringe. 5. Apply thickened epoxy/403 or 406 (peanut butter consistency) into the opened seams. Use a plastic spreader to force the thickened epoxy into the seam as far as possible (Figure 5-9). Check inside for epoxy leaking through the planks. Clean excess epoxy before it cures. 6. Shape the thickened epoxy at the inside corner of the seam to a square inside corner or a cove-shaped fillet.Anti Termite patio flooring cheap price A fillet increases the bonding area around the seam and provides more protection to the edge of each plank. For more details on fillets see Section 8.4.3. 7. Sand the seams and plank surfaces fair after the epoxy has cured thoroughly.

Fill and fair any remaining voids with an epoxy/low-density mixture. Follow the coating/finishing procedures in Section 7.Plywood has a high strength-to-weight ratio and makes an excellent boat building and repair material. Douglas Fir is the most common wood species used in plywood. Exterior construction grade plywood, available at lumberyards, has been used for boat building and repairs, but if the boat is going to see offshore service, we recommend a higher grade of plywood. Medium Density Overlay (MDO) is used by some boatbuilders because the resin-impregnated paper face provides a smooth base for paint and epoxy. AA marine grade is the highest quality Douglas Fir plywood for marine repairs. Mahogany plywood is the highest quality and first choice if the high costs are acceptable.Use a syringe to fill all voids (found in lesser grades of plywood) with thickened epoxy after cutting the panel to final shape. deck plans combination wood and compositeLesser grades of Douglas Fir plywood may require a layer of fiberglass cloth to prevent grain checking. 5.3.1 Rebuilding a plywood joint If the seam between plywood sheets has deteriorated, you can clean out the joint, seal the edges with epoxy and reinforce the joint with fiberglass tape applied with epoxy.

The seam may be on a flat surface or at an edge or chine. Rebuild a plywood joint as follows: 1. Clean out the seam by running a circular saw or scraping tool along the seam. Set the depth of the saw cut to the full thickness of the plywood when the seam runs along a frame. Set the width of the blade to shave the edges of both sheets of plywood at the joint and expose fresh wood on each edge. Remove any fasteners in the way of the cut. Be sure the wood is thoroughly dry. 2. Drive the fasteners deeper at the joint to allow for a valley to be sanded along the joint for the placement of one or more layers of fiberglass tape. 3. Sand a 4" to 5"-wide valley along the joint with a disc sander to allow the layer(s) of tape to lie below the surface.84 lumber pvc deck railing in Bengal Make the depression about 1 32" deep for each layer fiberglass tape that will fill the joint. Use the sander or a chisel to remove any additional damaged or rotted plywood around the joint. At an edge or chine, use the sander or a router with a round-over bit to round the corner.