How come I have never seen any treated hardwood? Is it not possible
to get the treatment into the wood, or what?
I am setting a shed on cement blocks, and would like to make a solid
base out of wood, but treated softwood tends to flex and warp.
Hardwood stays pretty straight. In fact I have it on oak planks now,
but they will rot in no time.
I already know someone is going to tell me to pour a cement footing,
and that would be ideal. The only problem is that according to local
law, if it is cemented, or if there are posts in the ground, it is
considered a permanent building, and I will be taxed for it. If it
sits on timbers or blocks, it is movable, and is not taxed. So much
for stupid laws, but I will keep it movable.... I will probably put
some wind anchors in the corners though. like the ones they use on
Did you ever see those old 1920s and 30s Frankenstein movies where the
townspeople show up at the castle with pitchforks, axes and torches? If
you ask this question in rec.woodworking, this will happen at your house.
Treated softwood flexes and warps because it's usually wet. In your case,
put down four or five inches of gravel, rent a vibrator and compact it down.
On top of the gravel, put down those six by six pressure treated landscape
timbers and put your oak on top of them. PAINT the oak first. The object
it to keep everything as dry as possible - rot won't happen if things are
I have a similar situation, but my needs are smaller. I want to put a
generator down without a foundation. I plan on using two of those parking
lot cement dividers with 6x6s on top to mount the generator. Should work
like a champ! The local masonary place sells the dividers for about $25 each
but they're heavy, very very heavy.
same reason you dont see those little green tree shaped air fresheners in
look into redwood. its pre treated by nature.
but first, take a deep breath and relax. people always go nuts over the
word tax. before you do something silly, find out exactly how much extra
tax you will be charged. it may be 20$ a year. it may be 200. it may be
10. find out what it will actually be and make an educated decision. dont
just blindly hate the system and end up building a substandard building with
tie downs and all that crap just to save a couple bucks a month and avoid
'paying any tax at all costs'. not to mention all these costs for expensive
hardwood flooring and tie downs are gonna cost you something too.
Next year I plant to build a shed on back of my garage. The permit will be
about $10. The tax increase will be less than $10 a year. Not worth
avoiding for the potential problems of no permit.
The warping is directly dependant on the moisture content and how it is
nailed up if wet. Depends on where you buy it too. I had to completely
rebuild a deck built with Home Depot wood. I don't buy wood there anymore.
Pressre treated wood is usually lower grade to start with. Buy from a
reputable lumber yard and nail/support it properly and you shouldn't have
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Hardwood is not pressure treated. Untreated woods that are suited for
outdoor use include white oak, teak, cedar, redwood and cypress.
These resist insect and water damage. If you decide to go with oak,
make certain you use white oak and not red oak. You will still need to
build a floor support base from PT 2x4s or 2x6s. Another option is
using PT ply on top, much less expensive than the woods mentioned, and
probably easier to install.
On Sat, 07 Aug 2004 01:07:44 -0500, snipped-for-privacy@NOT.com wrote:
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