An easy to build option to cardboard tubes for poured concrete piers.
http://www.fab-form.com/fast-tube/fast-tubeOverview.php
UPDATE to old thread - The manufacturer continues to develop interesting options for concrete forms.
Interesting product, but I'm not so sure it's "greener" than cardboard tubes.
Anyway, I would have a couple of questions for them besides cost.
How would one position re-bar in the tube?
How would one seal the joints of the left over tube material under a slab?
They also didn't show how to vibrate the air voids out during the pour.
I like it!
Would it be possible to use this in the bush of Alaska? Do you need to have a hose pumping in the concrete?
saw these at my lumber yard yesterday.
Cool - about a $1 per foot for 8"
http://doitbest.com/4294963880-Concrete+Forms.dib
We have a doitbest here so I pulled their number up.