You can burn old pressure treated wood

Do not paint pressure impregnated wood too early

Wood has to dry out for up to two years

In general, pressure-impregnated wood can be painted. Especially with the boiler pressure process, the absorbent and soft coniferous wood gets quite wet. If an earlier and faster coat of paint, for example in white, is desired, leached and oiled pine can be an alternative.

Typical locations where pressure impregnated wood is used are the framework of a carport, the supporting structure of a terrace roof and the hunter fence. During the impregnation process, the wood is “bathed” in a boron and copper solution that is deeply absorbed. The wood can take one to two years to achieve a paintable residual moisture. A previous deletion is usually not successful.

Colors and care products can be used individually or in combination

The painting of pressure impregnated wood can fulfill several functions:

  • Refresh and renew the effectiveness against fungi, insects and mold
  • Cover the look of weathered surfaces
  • Form a protection against UV rays
  • Seal cracks, cuts and injuries

Glazes are suitable as colors, wood oils as care products. They can develop additional protective effects in particular at drill holes, cracks and interfaces. The products are also available as combined solutions that both care and protect as well as color. Wood oils can be used as pure protective agents without coloring properties. If the wood is cut and drilled so that "injured" surfaces arise, an application of oil is always recommended. The impregnation usually does not reach into the core of the wood and cut surfaces and continuous holes expose unprotected substance.

If the paint is applied too early, the glaze will not hold up and efflorescence from salt residues contained in the impregnation agents can quickly destroy the initially opaque color image. The period of at least six weeks after manufacture and assembly often stated by manufacturers is far too short.

The impregnated wood rinses out the penetrated substances for up to two years. When it rains, it is easy to check whether the wood is ready to be painted. If streaks appear when getting wet and drying, the impregnating agent will leak out. The residual wood moisture must fall below twenty percent. As a rule of thumb, around two months can be calculated per centimeter of cross-section depth or diameter.

If somehow possible and you intend to re-color pressure treated wood, try to find old (long-seasoned) wood. For example, a used hunter fence can make more sense than a new one, since you will be redesigning it anyway. In general, you should use very strongly pigmented glazes and process them as viscously as possible.

Author: Stephan ReporteurStartseite »Building» Building materials »Wood