From wood finishes expert Bill Feist: Most pressure-treated wood sold in lumberyards is treated with CCA (chromated copper arsenate). Manufacturers who have wood chemists on their product-development staffs understand the nuances between different species and are more likely to tune their products to match the properties of particular woods. Ecolife, with its built in wood stabilizing system, has been specifically designed for above ground use, and as such has been proven to perform.
Wood treated with waterborne chemicals, such as alkaline copper quaternary (ACQ) or chromated copper arsenate (CCA) can be painted right after installation before any weathering occurs (assuming the wood is dry). A slight film may be formed after treatment with Ultimate Repair Wood Hardener on the surface of timbers of low absorbency. Wood and bamboo can be buried in mud to help protect them from insects and decay.
Also, by drying before treatment, checks and splits that develop are treated instead of opening after treatment and possibly exposing untreated wood. Ecolife is not a copper based preservative although there is some colorant added to distinguish the Ecolife treated wood from untreated wood. Paint will not last long periods on pressure treated wood if ya do not mind painting every couple years then go ahead.
If it is for an inside situation then you can paint due to peeling not being to much of a problem. All stainless steels may not be acceptable for use with preservative treated wood. It is possible that other white substances can develop on the surface of connectors. I assume he thought came across the same issue in the past as i did, where when painting the treated wood, only dark color was used.
EPA’s draft preliminary childhood risk assessment takes into consideration variations in exposure due, for example, to climate, weathering of the wood play structures, whether the child also spends time on a pressure treated wood deck, and months of the year that outdoor play occurs. If a particular landfill has restrictions against traditional treated wood, it may accept Wolmanized Outdoor wood.
Simpson Strong-Tie has tested more than 1,800 samples of various combinations of steels, coatings, preservative treatments, wood species, and over 3,000 fasteners to try to better understand the issues. However, it generally is not practical for the purchaser of small amounts of treated lumber to inspect the treatment. If your deck is getting some mildew or green moss, try a small spot to check for color changes.
By that time, I am hoping I’ll be able to afford to completely demolish the old porch and deck and rebuild. Wood should be treated with a preservative system to control the destructive activities of these organisms and ensure long-term structural soundness and serviceability. However, pressure treated wood should still be maintained with a stain or paint because it will still weather like untreated wood over time. Clean the surface of the WeatherShield pressure-treated wood again, and allow it to dry for 24 hours.
Always follow the precautions outlined in EPA’s Consumer Safety Information Sheet before working with CCA pressure treated wood. Because of that, kiln-dried wood reacts to weather conditions in a more consistent manner, and takes finishes more evenly. Waterborne, Creosote, and Oil-borne (penta) are the three broad classes of preservatives typically used when pressure-treating wood.
Limit their access to the deck; if limiting access is not possible, consider a rug for them to lie on. When laundering any rug from the deck wash it by itself to keep from cross contaminating any other items you launder. My input comes from a total neophyte, I do not paint for a living, and I have not a CLUE what the correct answer is. Therefore do not put stock in my little story. As small cracks develop on the deck’s surface from exposure to sun and water, water passes through and the paint soon peels.
Since most pressure-treated wood has knots and other defects, any lumber used for exterior trim would need to be carefully selected to find boards that are as clear as possible. D-Blaze fire retardant treated wood (FRTW) is designed for above ground use that is 100% sheltered from precipitation and direct wetting. At this point if the deck is too gray or weathered for your liking you could use a deck wash from the Hardware store or use oxalic acid to bleach the gray.
Preliminary Evaluation of the Non-dietary Hazard and Exposure to Children from Contact with Chrominated Copper Arsenate Treated Wood Playground Structures and Contaminated Soil. In the vacuum process, wood is placed in a sealed container and as much air is pumped out as is possible, creating lower than atmospheric pressure in the wood cells. Buying wood treated to either AWPA or federal specifications can help insure a quality product.
While Valspar does not make deck treatments, its acquisition of Cabot has certainly propelled it to the top of the category. As far as shortened lifespan goes, you may be observing a particular instance, but I’m not sure you can generalize – treated wood has been used and recommended for small boat docks where it’s constantly wet – like standing in water – and often for years. Water based sealers tend to stay on the surface where oil based are quickly absorbed into the wood.
A. William Feist responds: It’s not surprising that the paint on your pressure-treated wood decks is failing in two or three years. As mentioned earlier, each preservative usually has a number of variations available so care should be exercised when specifying treated wood. Completely remove all grey or de-natured wood from planed surfaces by sanding or by scraping back to a clean, bright surface then treat as new wood. Go back to SW, get enough A-100 oil primer and A-100 latex paint to do the job and try it out.