More recently, restrictions on the use of creosote and heavy-metal based wood preservatives
have focused public and government attention on technological developments in the wood protection area, specifically on the availability of more natural alternatives (Evans 2003, Schultz et al.
Standard Method of Determining the Leachability of Wood Preservatives
On the other hand, growing performance and environmental issues are major factors driving gains for greener or superior-value wood preservatives
. Growing concerns over the emission of VOCs has paved the way for the launch of various eco-friendly solutions such as radiation-cured coatings, water-based coatings and powder coatings.
In 2002, a 15-group coalition headed by the national nonprofit Beyond Pesticides sued the EPA for continuing to allow the use of these wood preservatives
, despite knowledge of their harmful effects, and dragging out the review process.
In February of this year, the Environmental Protection Agency announced a phase-out of a number of uses of arsenic and chromium-based wood preservative
by January 1, 2004.
"We changed the amount and the type of resins we used, added a borate based wood preservative
, and changed the geometry and matrix of how we put the product together," Bradford says.
The EPA has undertaken a reevaluation of penta, creosote and copper chromium arsenate (CCA), the most commonly used wood preservatives
. These chemicals can case cancer, birth defects, blood diseases and nervous system disorders.
Juss.) for its potential as an eco-friendly wood preservative
. In contrast to expectations from the literature, according to which neem oil should be effective against insects and fungi, neem oil performed poorly as a preservative for Pinus radiata D.
They will need more maintenance to avoid rot - to prevent rot add concrete to the bed of the posts; use tanalised timber or treat posts with a wood preservative
If the boards aren't pre-treated remember to apply a decking oil or treatment to them, and seal any cut ends with wood preservative
so they don't rot.
PREVENT WET ROT THE best way to protect wooden window frames against wet rot is to apply wood preservative
, paint or varnish regularly and always ensure that any new timber used for repairs or replacement is also treated with wood preservative
4 To prevent further decay, coat the remaining sound section of post with wood preservative
, including the base.