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-   -   use of pressure treated wood in the garden (http://www.diychatroom.com/f16/use-pressure-treated-wood-garden-8773/)

bscout 05-28-2007 05:38 PM

use of pressure treated wood in the garden
 
I am doing a boyscout eagle project building benches in a high school garden. My plan was to use pressure treated wood for the posts that go into the ground but i just found out the school district will not allow toxic chemicals. IT would be impossible to convince them that a product is okay if it is not on their list. What alternatives do I have to this which would be durable in Los Angeles ground, would not be chemically treated with anything which might be called toxic, and would be a reasonable cost and easy to obtain. Please also include whether i should coat whatever you suggest and what i should use as a coating.(paint, oil, etc)
Thank you

Teetorbilt 05-28-2007 06:02 PM

This is just FYI (I submitted an idea on your other topic), you can coat almost any wood with epoxy (most become inert when cured) and get a very long lifespan. It will have to be painted from time to time as most current epoxies tend to deteriorate rapidly from exposure to UV radiation (sunlight).

ocoee 05-31-2007 11:10 PM

What is their stand on boric acid compounds such as Timbor or Borid
http://www.alsnetbiz.com/homeimprovement/homemade.html

handy man88 06-01-2007 09:00 AM

Quote:

Originally Posted by bscout (Post 46670)
I am doing a boyscout eagle project building benches in a high school garden. My plan was to use pressure treated wood for the posts that go into the ground but i just found out the school district will not allow toxic chemicals. IT would be impossible to convince them that a product is okay if it is not on their list. What alternatives do I have to this which would be durable in Los Angeles ground, would not be chemically treated with anything which might be called toxic, and would be a reasonable cost and easy to obtain. Please also include whether i should coat whatever you suggest and what i should use as a coating.(paint, oil, etc)
Thank you

PT that was treated with arsenic was phased out back in 2004. Now, all PT wood use a copper based treatment, which is supposed to be safe.

AtlanticWBConst. 06-01-2007 09:10 AM

ACQ information
 
EPA Link:

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.
http://www.epa.gov/oppad001/reregistration/cca/acq.htm

Additional Link:

Can ProWood ACQ treated wood be used in gardening?
Yes. Treated wood can be used to construct raised vegetable gardens and flowerbeds. ...... In addition, the components of ACQ are known to be non-carcinogenic.
http://www.ufpi.com/product/ptlumber/ptfaq.htm#1

handy man88 06-01-2007 09:49 PM

CCA is is not available anymore since it contains arsenic. ACQ is safe.

silva12 06-06-2007 11:10 PM

my goodness they are strict

skymaster 06-07-2007 12:23 AM

Bscout: TIMBERSIL also if you can locate it in your area


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