Wash the wood with this solution and let dry. Do you have a clue as to what is happening? Moisture is the primary vehicle for the tannins being leeched to the exterior of the substrate. Be sure to use a plastic bucket to mix this solution. Oxalic acid is poisonous and can burn your skin and eyes. • The surface of the cedar must be adequately primed and sealed; this includes all edges and cut ends. These stains appear to originate from behind the siding. Sign up to my newsletter to receive expert advice for your home! Remember, the end grain of a piece of wood is where water can most easily enter. Cedar bleed occurs when the natural tannins in the wood are drawn to the surface and deposited on the exterior face of the substrate. The bleeding is often increased and made more noticeable by other moisture problems such as improper venting, insufficient caulking or flashing, leaks, and other situations that allow moisture to get into or behind the wood. Fall & Winter are Ideal for Home Interior Painting Projects. Subscribe to the FREE Ask the Builder newsletter to receive professional advice for your home. • The cedar needs to be properly cured. How to Clean Painted Walls Without Damaging Them? The stains caused by the extractive chemicals and the nails can often be successfully removed. Five Star Painting is a Neighborly company. The good news is that there are ways to remove or hide the staining and prevent the problem from continuing. These tannins are often observed as a reddish-brown discoloration. The primary cause for tannins to bleed to the substrate’s exterior is moisture. This water could have been water vapor that condensed on the back of the siding after it traveled through the walls of your house. Moisture is the leading cause of discoloration in cedar siding. or at our main office number 860-678-7701 Make sure the siding is installed properly including priming of cut ends, proper flashing, and the use of the correct fasteners.2. Blisters can only form if water has soaked into the wood. The trick is to seal completely each piece of exterior wood before it is installed. • The paint you use should not be water-based latex stain or paint, since these products use water as carriers. When the water finally broke through a seam in the siding it ran down the siding, evaporated, and left the brown chemicals behind. The use of inferior types of siding and trim is usually a result of trying to cut corners to build at the lowest possible costs. It may be in your best interest to replace the nails to prevent further staining. A common problem that homeowners have with cedar siding, however, is extractive bleeding or tannin staining. At Neighborly, we are committed to being there for all your home services needs. Apply primer to the edges and ends. The methods for avoiding and removing tannin staining can get complicated and confusing if you are not experienced in this type of work. Whenever possible, use the best available materials including pre-primed (and pre-finished if possible) clear vertical grain (CVG) cedar clapboards. Follow this with a solution of four ounces of oxalic acid … This natural phenomenon is not caused by the coating itself. • Use a scraper or wire brush to remove all loose paint. Complete the form below and each week you'll get: Unsubscribe at any time. Feel confident that you are hiring the best in the business. When the solution dries, rinse with fresh water. How to Make Your Interior Trim Stand Out! If you are experiencing a problem with cedar bleeding on your home, contact your Five Star Painter to receive expert advice and a free estimate for the professional maintenance. To make sure the staining is done correctly the first time or to fix existing problems, allow our professional home maintenance staff to help you with any cedar bleeding and tanning staining issues that you may have. Mix one cup of trisodium phosphate, one cup of bleach and one gallon of water and wash the siding with this solution. Allow the property to dry completely after power washing (5-10 days)4. Then allow the repellant to dry and fill each hole with exterior wood filler. Be sure to seal the cut ends of each piece of wood as well. But another strategy is to countersink each of the nails and swab the holes with top-quality water repellant. Water soaks into the wood, dissolves the chemicals and then is drawn back to the surface by wind action or sunlight. Follow this with a solution of four ounces of oxalic acid crystals dissolved in one gallon of warm water. This natural phenomenon is not caused by the coating itself. Many species of wood contain tannins, including cedar and redwood. There are now stain blocking primers on the market that will effectively reduce the cedar bleed. Be careful! The current building owners usually realize that they would have been better off paying slightly more for a better product up front. Many species of wood contain tannins, including cedar and redwood. Should you decide to paint redwood in lieu of staining, this sealing process or back-priming is absolutely essential.