https://www.epa.gov/ingredients-used-pesticide-products/overview-wood-preservative-chemicals
Newer Wood Preservatives for Residential Uses
More recently, EPA has registered several new wood preservative active ingredients. These wood preservatives have lower toxicity profiles when compared to older wood preservatives. As required under section 3(g) of FIFRA, these newer wood preservatives will be re-evaluated through EPA’s registration review process.
The following chemical wood preservatives are registered for treatment of lumber to be used in the residential lumber and timber market:
ACQ.
Borates.
Copper azole.
Copper naphthenate.
Copper-HDO (Bis-(Ncyclohexyldiazeniumdioxy-copper)).
Polymeric betaine.
Of these chemicals, ACQ currently is the most widely used wood preservative for residential applications.
ACQ (alkaline copper quaternary) is a water-based wood preservative that prevents decay from fungi and insects (i.e., it is a fungicide and insecticide). It also has relatively low risks, based on its components of copper oxide and quaternary ammonium compounds.
Water-based preservatives like ACQ leave a dry, paintable surface. ACQ is registered for use on: lumber, timbers, landscape ties, fence posts, building and utility poles, land, freshwater and marine pilings, sea walls, decking, wood shingles, and other wood structures.
Human Health Risk Evaluation of ACQ-Treated Wood By Cushing, C A Golden, R; Lowney, Y W; Holm, S E
http://www.walterreeves.com/uploads/pdf/acqwood.pdf
This risk evaluation included all chemical components of ACQ Type D that might be present on the surface of ACQ-treated wood. Overall, the results demonstrate that exposure to copper, DDA Carbonate, and MI/MCI from ACQ Type D from the surface of treated wood are not expected to be associated with any adverse effects to adults or children who might come into contact with this product.
Alkaline copper quaternary (ACQ) Type D
9 Comments
Thank you. Thank you.
You definitely did your research for this video, and it's much appreciated.
I haven't experimented with this, but you could also use a Japanese fire hardening process call sugi-ban. It's usually used on cedar, or cypress
It's pest resistant, water resistant ,UV resistant, rot resistant, and fire-resistant. The method was used on Japanese architecture that is hundreds of years old, and still standing.
Something else I've seen used lately is the corrugated metal raised beds that stand about 3' tall.
You can fill the bottom with small logs, sticks.yard debris, then top it of with soil, and compost.
When the debris below breaks down, it adds nutrients, helps retain moisture, and adds heat to the soil. Great for those that live in a colder climate.
The poisons that get sprayed on food are more of a problem than treated lumber.
Study funded by Georgia Pacific. The same company that the EPA keeps hitting with violations.
South island, New zealand , we have been using CCA forever .Plenty of testing shows it to be generally safe (as you stated).As a carpenter I never wore masks or gloves – no one did generally – after 35 yrs working i am not sick and there are no arsenic poisoning epidemics i am aware of (although with education i do now wear a mask in confined space and gloves if timber is newly treated , wash hands befroe eating ) Ironically the very real danger exists when timber was not needed to be treated with a change in building code 20 yrs ago – these houses present a real danger with mold spores –
Thank you for your post. I planned to use borates to reclaim some wood, and test subsequent paintability. New weather means persistent bugs in new places, so more diligence. Your reminder and link to online resource was timely. Thank you for your resource, and for sharing your interests!
it says what they use in the specs section
Color/Finish
Brown
Fastener Recommendation
Galvanized Fastener
Features
Paintable,Pressure Treated,Stainable,Water Resistant
Lumber Grade
#2 prime
Material
Southern Yellow Pine
Moisture content
Green
Pressure treatment chemical
MCA – Micronized Copper Azole
Texture
Smooth
Wood Species
Southern Pine
I just bought a new shed which is supposed to have treated plywood floors, but the color of the plywood seems to be very lite in color, is that normal?
Who did this study — people working for the lumbar company? Studies are bias and only include and conclude what they want you to know and what sells.