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  • How to Bend Wood

    Bending wood is not the daunting task that it appears to be at first glance. Depending on the degree of bend, and whether or not the bend is compound, there are a couple of methods for bending wood.

    curves-patio-furnitureFirst, you need to have a form to bend your wood around and clamp to to hold thedesired shape. Most bent wood will have a certain degree of "springback", so you must build your form with an allowance for this. And, unfortunately, there is no established formula for determining the degree of springback that a given species of wood will produce. Springback is also influenced by the bending method used. That is to say that steamed wood will spring, or "unbend" more than wood that is laminated and glued. Another variable is the type of glue used in laminating.

    As a general rule, the tighter the bend, the more the wood will spring back, making the allowance a matter of trial and error at best.

    As laminating thin strips is the easiest method, we'll begin with that process. The finished thickness of the project will have a direct bearing on the size of the strips to be used, but generally, the heaviest strip to use is about ¼" thick. Tight bends may have to be done with 1/8" strips or thinner, depending on the wood species. Sounds like a lot of experimenting, but I'm afraid that's a necessary evil.

    bend-woodThe form required for laminating can be as simple as a piece of pipe or as complex as a multi-station die. I like to keep things as simple as possible.

    When laminating thin strips, you can minimize effort and spring back by soaking the strips before bending, and clamping them in the mold without gluing. Once they are dry, remove them from the mold, spread the glue and re-clamp them in the mold. Line the mold with waxed paper to prevent the lamination from sticking to the mold.

    When I soak strips, I do so in an open container, and depending on the wood and the size of the strips, I soak them from 15 minutes to overnight. I also mix in a half cup of fabric softener per gallon of water. I find that it softens wood nearly as well as fabric.

    If the project is small, and open time on the glue is not a factor, I'll use poly-vinyl-acetate, or aliphatic resin glue. If I need more working time, I'll use epoxy or resorcinol. I stay
    away from the quick setting epoxies, however, because they rarely harden to the extent that the slow sets do. If you're using light colored wood, resorcinol dries to a reddish color which might be objectionable on a finished project.

    When bending thin woods such as guitar sides, the wood is commonly soaked as above, but it is bent over a hot bending jig, either electric, or heated with a propane torch. Brittle woods are supported on the outside of the bend with a thin stainless steel band to help prevent cracking. Green woods can be bent much in the same way, or by heating the wood over hot coals or with a good heat gun.

    For projects where lamination is objectionable, or when the wood is to be bent in compound curves, a steam box is the answer. One can be made fairly economically from PVC pipe, but it needs to be supported to keep the pipe from deforming.

    The ends of the pipe need to be closed with a screw cap on at least one end, to allow access to the interior. Fit the other end of the pipe with a DWV reducing tee, and attach a radiator hose to the side outlet and to a new gas can large enough to hold sufficient water to last through the job. The water may be heated with a hot plate or a propane burner.

    Drill through the pipe slightly below center in two or three locations and insert dowels for the wood to rest on. Steam must be allowed to circulate freely around the wood for even penetration. A hole about ½" in diameter should be drilled in the cap furthest from the steam inlet to allow circulation. When you build the support frame for the steam box, pitch the box toward the steam inlet to allow the condensation to return to the water supply.

    Rule of thumb says that wood should be steamed fifteen minutes per inch of thickness, but here again, some experimenting will be necessary.

    The wood needs to be placed into the form as quickly as possible, because as the wood cools, it is more difficult to bend. Make sure that your wood is at least two feet longer than the finished part, because it's nearly impossible to bend a 3/4" piece of wood that is less than a foot long, so that last foot will have to be cut off after the wood is dry.

    Clamp the wood in the form securely, and leave it there until it is completely cool. If you are working with multiple pieces, place them in the steam box a approximately the interval required to place the piece in the form and clamp it, and remove them from the box in the same order.

    With a little practice and a little luck, it shouldn't take long to become proficient in wood bending. Good luck with your project, and if I can be of any help or answer any questions, feel
    free to respond to this post, or email me at campbell5017@bellsouth.net .

    To get the e-book "How To Bend Wood" as well as other e-books I have written on various aspects of woodworking, click here.

    Grant Campbell. Grant has been a professional woodworker for over 50 years. He would like to pass on some of his favourite tips and techniques through his articles

  • How To Paint A Brick Fireplace

    Learn how to transform an old fireplace with new paint and molding.

    We brought an old fireplace back to life with a little elbow grease, a couple coats of paint and new mantel (materials found at a salvage shop). It was cheap, easy and the results are stunning.

    CI-Susan-Teare_Brick-FireplTools and Materials
    wire brush
    screwdriver
    tape measure
    chop saw (optional, if extra wood is added to mantel)
    studfinder
    simple recycled mantel (to slip over the old stone mantel)
    (2) salvaged boards (optional for larger mantel)
    4 to 8 long screws
    paintbrush and painter's tape
    white paint for mantel (eggshell, latex)
    paint for brick (eggshell, latex)
    black heat resistant paint for firebox
    sandpaper
    wood glue
    wood filler
    water/white vinegar spray
    rags
    shop vacuum

    Here's what the fireplace looked like before:
    Original-Brick-Fireplace_Before_s4x3_lg

    Scrub the Brick
    Lay down a drop cloth to make clean up easier. Use a wire brush to get all the dust and sot off the brick fireplace. Vacuum the entire area.
    Original-Brick-Fireplace_Scrubbing-Brick_s3x4_lead

    Wash the Brick
    Spray the fireplace brick with a 50/50 mixture of water and vinegar then use a rag to clean off any residue so the paint and adhesives can stick.
    Original-Brick-Fireplace_Spray-Vinegar_s3x4_lead

    Paint the Inside
    Paint the inside the firebox area with special heat-resistance paint. Apply two coats if necessary.
    Original-Brick-Fireplace_Painting-Inside-Box_s4x3_lead

    Paint the Brick
    Paint the rest of the brick with your paint color. Brick is porous, so make sure to push the paint into the brick so there are no pinprick holes showing. Apply a second coat if necessary.
    Original-Brick-Fireplace_Painting-Brick_s3x4_lead

    Build a New Mantel
    Measure the current mantel top and plan a design. We got lucky and found a simple mantel at a recycle center that will slip over our existing mantel. We added molding to the newly found mantel to give it more interest. We attached the molding with wood screws, covered the holes, then sanded and painted the entire mantel.
    Original-Brick-Fireplace_Mantel-at-Resale-Shop_s3x4_lead
    Original-Brick-Fireplace_Mantel-With-New-Molding_s4x3_lead
    Original-Brick-Fireplace_Painting-Mantel_s4x3_lead

    Install the Mantel
    Place the mantel over the top of the old mantel. Find the studs in the wall, they should be just at the edge of the fireplace. Toe-nail the screws into the mantel through the wall.

    Fill the screw holes with wood filler, let dry, sand and then paint to match the mantel.

    Joanne Palmisano - Joanne is the author of Salvage Secrets

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