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cbzdel 07-26-2010 03:18 PM

raised garden next to house
can you make a raised garden next to a house? not directly on the house, but if I build a pressure treated box about 4" to 6" off the face of the house?

Gerry Petard 07-26-2010 07:22 PM

I don't see the problem with that. What is your concern, specifically?

firehawkmph 07-26-2010 08:22 PM

I don't think being close to the house is a problem, as long as you didn't already have a drainage problem to start with. I would consider using something besides treated lumber to frame it with, maybe cedar, redwood, or cypress. I don't like the idea of whatever is in the treated lumber leaching out where I am growing things to eat. Just my personal opinion.
Mike Hawkins:)

cbzdel 07-27-2010 10:53 AM

I was just concerned about moisture and maybe condensation on the siding, with possible mold and mildew problems... Just over thinking a simple projects :laughing:

edit: good idea on the treated lumber to, I didnt think about that!

Scuba_Dave 07-27-2010 12:17 PM

I used PT on my raised garden
I then lined the inside with the old vinyl siding off the house
I have PT posts in my garden for support structure
CCA (has arsenic) is no longer made, new wood is ACQ & does not have arsenic


Certain national gardening publications have raised concerns about the safety of using treated lumber in food gardens. Pressure-treated lumber uses CCA (chromated copper arsenate) or ACA (ammoniacal copper arsenate) as a preservative. However, studies done by Texas A&M Agricultural Extension Service showed insignificant movement of these compounds into surrounding soil. Pressure-treated lumber has no proven effect on plant growth or food safety. However, on Feb.12, 2002, the U.S. Environmental Protection Agency (EPA) announced a voluntary decision by the lumber industry to move consumer use of treated lumber products away from a variety of pressure-treated wood that contains arsenic by Dec. 31, 2003, in favor of new, alternative wood preservatives. Alkaline cooper quaternary (ACQ) is a relatively new wood treatment that is available in some areas of the country. This product is higher in copper than CCA but is free of arsenic.

Gary in WA 07-27-2010 01:32 PM

P.t. wood is not waterproof. Unless you buy it specifically treated for that--- with an extra cost. You are fine using the "ground contact, 40%retention" in dirt but remember not to water the plants as the p.t. will absorb water and rot, but not from insects or decay. Never entomb p.t. in concrete. A p.t. post in the ground will absorb water from the dirt by capillary action and adhesion. A tree feeds water to its leaves and fruit from its roots up through the trunk (think post). I would treat the p.t. with a waterproof liquid, especially the cuts and bare ends.

Be safe, Gary

cbzdel 07-27-2010 03:49 PM

got me thinking maybe I should try out a composite material... that would last forever right :thumbup:

Scuba_Dave 07-27-2010 04:32 PM

Like the composite decks that fall apart after 2 years ? :laughing:

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