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#1
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Pressure treated wood -- ACQ?
I was looking at lumber for building raised beds in my garden. I was
planning to use untreated 2x6's for the sides and ends, and pressure treated 2x4 stakes in the corners and joints. (I would use creosoted 2x4's if I could find them.) I live far enough north that I don't have to worry about termites. Home Depot has some new pressure treated lumber that's supposed to be non-toxic; it's treated with ACQ instead of CCA. "Alkaline copper quaternary." Has anyone heard of it? I haven't bought anything yet until I do some research. -Bob |
#2
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Pressure treated wood -- ACQ?
"zxcvbob" wrote in message ... I was looking at lumber for building raised beds in my garden. I was planning to use untreated 2x6's for the sides and ends, and pressure treated 2x4 stakes in the corners and joints. (I would use creosoted 2x4's if I could find them.) I live far enough north that I don't have to worry about termites. Home Depot has some new pressure treated lumber that's supposed to be non-toxic; it's treated with ACQ instead of CCA. "Alkaline copper quaternary." Has anyone heard of it? I haven't bought anything yet until I do some research. -Bob Bob Things you should be aware of with the new ACQ lumber. 1. There are different grades of it. You should be looking for wood labeled for ground contact. 2. The copper will corrode galvanized or zinc plated screws and nails. If you expect it to last you will need stainless steel hardware or at least double dipped galvanized. Does anyone here know at what level copper is toxic to plants? Boron treated lumber is another alternative but in high levels boron is also toxic to plants. Personally with all I have heard about the new PT lumber I will wait until more is known about them. Bill |
#3
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Pressure treated wood -- ACQ?
hollenback wrote:
"zxcvbob" wrote in message ... I was looking at lumber for building raised beds in my garden. I was planning to use untreated 2x6's for the sides and ends, and pressure treated 2x4 stakes in the corners and joints. (I would use creosoted 2x4's if I could find them.) I live far enough north that I don't have to worry about termites. Home Depot has some new pressure treated lumber that's supposed to be non-toxic; it's treated with ACQ instead of CCA. "Alkaline copper quaternary." Has anyone heard of it? I haven't bought anything yet until I do some research. -Bob Bob Things you should be aware of with the new ACQ lumber. 1. There are different grades of it. You should be looking for wood labeled for ground contact. 2. The copper will corrode galvanized or zinc plated screws and nails. If you expect it to last you will need stainless steel hardware or at least double dipped galvanized. I was planning to use bright 16d nails. I don't care if the stain, and it should take a *long* time to rust through a 16d nail. Does anyone here know at what level copper is toxic to plants? The copper level shouldn't as high as the bordeaux mixture or copper oleate fungicide sprays. Boron treated lumber is another alternative but in high levels boron is also toxic to plants. Personally with all I have heard about the new PT lumber I will wait until more is known about them. Bill Best regards, Bob |
#4
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Pressure treated wood -- ACQ?
zxcvbob wrote:
Home Depot has some new pressure treated lumber that's supposed to be non-toxic; it's treated with ACQ instead of CCA. "Alkaline copper quaternary." Has anyone heard of it? Greenhouses have been using 20% copper-naphthenate preservative on greenhouse benches for decades with no problems. Cuprinol is one brandname for this product. The copper is no problem. I don't know anything about ACQ. -- Pardon my spam deterrent; send email to Visit my Rhododendron and Azalea web pages at: http://home.earthlink.net/~rhodyman/rhody.html Also visit the Rhododendron and Azalea Bookstore at: http://home.earthlink.net/~rhodyman/rhodybooks.html Cheers, Steve Henning in Reading, PA USA http://home.earthlink.net/~rhodyman |
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