Wood differs from other common building materials in that it is a natural biological material. I thought about a dark brown stain for everything but I’m hesitant to stain my new redwood fence with any stain that is going to take away from the beautiful natural wood look. If the wood in your deck is pressure-treated with CCA, the EPA recommends using a semi-transparent stain, which tends to penetrate wood and seal in the arsenic, preventing it from leaching out. Love the look of the red and white wood colors and leaning towards some sort of oil clear coat. The result is a table that’s colored, but still shows the wood grain through the paint.
They also help protect the wood from sunlight damage to varying degrees depending on their content of organic UV absorbers or inorganic pigments. Since 1988, Preschem has become Australia’s leading manufacturer of timber preservatives and exterior finishes. Sherwin-Williams manufactures deck treatments under the Deckscapes line, which is sold at more than 3,000 company-owned retail stores.
However, because it’s in the wood rather than on it, these oils don’t offer the best protection and wear/moisture resistance, and should be used on places that receive minimal wear, or on pieces where fresh coats of oil can easily be reapplied. I am designing a pergola for my back porch right now and I haven’t decided what finish to put on the wood. Particleboards are manufactured from whole wood in the form of splinters, chips, flakes or shavings. These finishes are absorbed into the wood without forming a film; they do not crack or peel.
Any film-forming finish is likewise subjected to excessive stress because of the continuous shrinking and swelling of the wood that results from changes in its moisture content. Oil-based finishes penetrate better than the water-based finishes, whereas water-based versions offer more coverage than oil-based lines – because they don’t penetrate as much – and clean up with soap and water.
The toxicity of the chemicals used in wood treatment has led to research into less toxic methods such as the use of borates derived from the natural element boron (borax). Architectural coatings available for wood generally include paints, stains, varnishes and water repellents. However, wood properly treated with a preservative can withstand years of exposure to severe decay and insect attack without being affected. DO NOT apply Restor-A-Finish to the new imitation wood finishes or use it under polyurethane finishes.
But that density also makes it harder for manufacturers of stains and wood coatings to create products that penetrate the surface rather than forming a film over it. By understanding the nature of finishes as chemicals on the surface of the wood, the finisher can greatly expand his abilities to use different finish materials. Wood siding and trim should be treated with a water-repellent preservative or water repellent.
Let the wood dry and then sand it with 220- or 320-grit sandpaper, coarse enough to remove the raised grain efficiently, but no coarser. Also known as opaque stains, solid treatments typically hold up for at least three years—the longest overall. Semi-transparent stains, transparent stains, water repellents and natural oils are often thought of as penetrating the wood rather than leaving a thick film on top of the wood. We’d recommend you leave your doors in the house where they are to be re-hung to allow the wood to acclimatise and dry fully.
Avoid frequent or prolonged skin contact with creosote-treated wood; when handling the treated wood, wear long-sleeved shirts and long pants and use gloves impervious to the chemicals (for example, gloves that are vinyl-coated). Water repellents protect the wood against the entrance of rain and dew and thus prevent swelling and shrinking. With this in mind, the following is an overview of a number of consumer-level wood finishes, as well as my honest assessment as to which ones work best, and when.
Water-borne coatings are generally more flexible (less prone to crack as wood shrinks and swells from moisture changes) and more vapour permeable. Alternate finishes such as semitransparent stains and water- repellent preservatives will give a longer service life and are easier to refinish. Unmodified oils such as tung, linseed, and walnut can also be used as sealers if they are thinned to penetrate the wood.
Figure 5. Oil-based finishes are likely to remain on the market for some time, although new VOC regulations may limit where they can be sold. It is absolutely critical with open-grained woods that the pores be filled in order to obtain a smooth wood surface before any finish is even applied to the wood. Note the normally weathered paint, good condition of the wood and glazing on the treated structure.
In these cases, sanding the wood prior to finishing it will release damaged lignin and loose wood fibers and provide a better base for finishes to cling to, making them last longer. Although coconut oil is excellent as a wood treatment, wood conditioner, and wood stain carrier, it does not provide a durable finish to wood, as it does not dry to a polymeric topcoat. Note: Film-forming finishes are normally not recommended for use on Western Red Cedar decks because they can fail by cracking, flaking and peeling and can be very difficult to refinish and maintain. After the water-repellent preservative or water repellent has dried, the bare wood must be primed.
Made with acrylic-based resins, today’s water-based finishes have gained a respectable place in the finishing market. With an effective advertising campaign that includes television spots over the last decade or two, Thompson’s WaterSeal has become a recognizable brand leader in deck treatments. When wood is treated in place, liberal amounts of the solution should be applied to all lap and butt joints, edges and ends of boards and panels. Recoat Regularly: Even the best finishes wear and break down over time when exposed to the elements, so plan on recoating your furniture every year or two. Wood treatment does offer a method to extend the usable life of our wood resources.