If you are new to the forums, you must register a free account before you can post. Generally, if your deck has not been constructed with redwood or cedar, then most likely the deck was constructed with CCA pressure treated wood. On pressure treated wood penetrate below the surface for more thorough protection of the wood. Ultraviolet rays from the sun, moisture, heat and foot traffic will degrade surfaces of deck boards. Your best bet is to leave the wood in the sun for several months until it no longer leeches liquid, and then coat. The grease provides a protective long lasting coating that can be slowly absorbed into the wood.
Recent concerns about the health and environmental impacts of metallic wood preservatives have created a market interest in non-metallic wood preservatives such as Propiconazole-Tebuconazole-Imidicloprid better known as PTI. Boric acid, oxides and salts (borates) are effective wood preservatives and are supplied under numerous brand names throughout the world. Back brush the spray, or better yet, use a sponge-pad applicator to push stain deeper into the wood.
Least to most durable (least to most expensive) goes like this for SW: A-100 exterior latex, Super Paint exterior latex, Duration exterior latex. During the treating process, water repellent is driven deep into the wood to protect all surfaces and to help minimize the weathering effects of cracking, splitting and warping. Maintenance through sealing creates a natural wood (pine) appearance due to the transparent or semi-transparent properties of the sealer. Ecolife treated wood exhibits reduced cracking, warping and splitting in service, and uses no more chemicals than is absolutely necessary. Use regular wood and treat with linseed oil or non-toxic stain or paint, and replace it more often.
CCA may no longer be used to treat wood used in ‘intimate human contact’ applications such as children’s play equipment, furniture, residential decking and handrailing. Most of the world’s experts in wood protection actively serve on our Technical Committees – a level of expertise unmatched elsewhere. For fully exposed decks, a water-repellent sealer or a penetrating semi-transparent stain may provide the best finishing solution, even on wood that has been pressure treated with preservatives. Dipping or brush treatments of penta for wood in areas of mild decay hazard can generally be painted without problems.
Verify that the sealer has a few key properties: 1) waterproofs, 2) stops the growth of mold, mildew and fungi, 3) protects the wood from wood-destroying insects. Industrial users may dispose of treated wood in commercial or industrial incinerators in accordance with provincial and federal regulations. Apply Cuprinol Ultimate Repair Wood Hardener liberally by brush to the repair area and immediately around it. Apply 2-3 coats, allowing each to soak in before the next coat is applied. This bridge made from acetylated wood near Sneek , the Netherlands , is designed to carry heavy traffic.
Unfortunately, on deck and most outdoor applications except siding the surface will get nicked, scratched and otherwise develop leaks in short order. Round posts of white oak and jack pine cold soaked in penta for 48 hours have average service lives in the range of 18 and 27 years respectively. The most common chemicals used to treat wood are Alkaline Copper Quaternary (ACQ), Copper Azole (CA), and Micronized Copper Quaternary (MCQ). This is important on wood that people will be touching, such as decks, porches, and outdoor railings.
I agree with Jim Casper – after about 50 years of dealing with weathered wood finishing both in my homes and in the construction business, it comes down to about 90% preparation, 10% the finishing. I use black asphalt paint and it works fine but the key is to be sure they are good and dry before you try to paint or it will bubble. There is nothing like real wood to me, even if it does requires TLC from time to time. So, when the porch and deck began to look bad, I only had one choice to make it look nice again: REPAINT IT! Dispose of cut-offs or old, weathered wood with the other construction debris at your local dump or transfer station.
The wood used was most prevalently preserved with chromate copper arsenate (CCA) and its use began to cease in 2004 due to safety concerns. None of the water collected from the specimens coated with latex or oil-based paint contained any detectable copper, chromium or arsenic. This treated wood utilizes a fire retardant chemical that remains stable in high temperature environments. All new work should include treatment with a wood preservative where necessary. The deck is right beside the screened-in porch and you access the deck through a soon-to-be-door from the screened-in porch.
Before treatment wood should be clean, free from bark, dirt and any surface treatment such as paint or varnish, air dry (25% moisture content maximum), properly prepared and fully worked. It is harvested from both old-growth and plantation in Australia and is highly resistant to rot and termites It is most commonly used for fence posts and house stumps. If pressure spraying, don’t set the pressure too high, so you won’t damage the surface of the wood.
Wood is nature’s own material, entirely sustainable, 100% renewable, recyclable and a reusable building product. When building your fence for the long term, understand that the chemical process does not go through the entire piece of lumber. The extractives of some wood species are toxic to rotters making their heartwood very durable for use in areas of high decay hazard. As time progressed and the public concern over the safety of CCA-C intensified, the treated wood industry decided to voluntarily phase out CCA-C. All of the railings and spindles are brand new (i.e. were unpainted pressure treated).
For new pressure treated wood just a single penetrating coat of stain like Rainforest or Mountain XT is the best. Every wood species takes pigments differently, and while color charts can provide some guidance, don’t rely on them. Exterior wood treatment solutions extend the natural life of the wood used in construction applications, and provide exceptional performance for outdoor projects. Pressure treated wood does not have to be stained, painted, or otherwise sealed immediately.
For the control of pests that may be harbored in wood packaging material (i.e. crates and pallets ), the ISPM 15 requires heat treatment of wood to 56 °C for 30 minutes to receive the HT stamp This is typically required to ensure the killing of the pine wilt nematode and other kinds of wood pests that could be transported internationally. Other water-based preservatives: are based on boron salts which are widely considered to be safe to humans and are usually applied as a paint or gel.
To check if the wood is dry enough for stain or paint, put water drops on the surface. If you do tackle the staining yourself, you’ll want to make sure the deck is dry – two to three days in dry weather is typically sufficient – after it’s been cleaned and then apply either a clear sealer or a semi-transparent stain. I used to paint my house on the outside, but after falling off a ladder and breaking some ribs, I promised my children I wouldn’t do that again! Wolmanized wood waste, such as scraps, broken boards, and sawdust, can be disposed of with ordinary trash collection. Ensure flaking or chalky paint is removed by stripping and sanding to a sound surface.
If the plant’s treating practices meet AWPA specifications they are allowed to stamp the AWPB quality mark on their treated products. Although it doesn’t look so nice, it doesn’t affect the structural integrity of the deck. Pressure-treated wood may contain arsenic, so EXTREME caution should be used when sanding it. Arsenic is known to cause cancer in adults and children. The twisting effect can end up loosening floorboards and railings, causing the wood to crack, splinter and become uncomfortable. CCA or penta in volatile solvents should be used where a clean paintable surface is required.
There was no pressure treated lumber widely available back then and the rough hemlock that was often used has stood up as well as any PT. My own 22 yr. old deck was framed with ordinary spruce, posted with white pine and decked and railed in select PT. We do not have termites in my area. It is made for preservative use by distilling coal tar, and it can also be made from wood or petroleum. Apart from this, fire retardant treated wood should not be used where preservative treatment is required, nor should preservative treated wood be used when fire retardant treated wood is required.
There is no waiting period for today’s pressure treated wood to let chemicals leach out. Wash away the dirt with a hose or a very low setting (below 500 psi) on a pressure washer. When the timbers are changed to the cold bath (the preservative can also be changed) a partial vacuum is created within the lumen of the cells, causing the preservative to be drawn into the wood. Acetylation effectively changes the free hydroxyls within wood into acetyl groups.
I finally got it down to clear wood, used … guess what … Olympic Elite Wood oil for a fabulous finish. Apply a coat of clear wood preservative to the WeatherShield pressure-treated wood with a good-quality paintbrush or paint roller to keep it from deteriorating in the elements. Plants can take up arsenic from the soil, so it may not be a good idea to use pressure treated wood in gardens.
These processes autoclave the treated wood, subjecting it to pressure and heat, along with nitrogen or water vapour to control drying in a staged treatment process ranging from 24 to 48 hours at temperatures of 180 °C to 230 °C depending on timber species. Plant based preservatives: Some vegetable-based natural products are available from specialist companies but they are largely for staining or interior use and tend to be expensive.