Garrett Connelly wrote:A complete ferrocement how to on water tanks may be found here http://www.ferrocement.com/tankBook/indici.en.html
Ferrocement liners may be placed in old rock or steel tanks.
Sarah Haas wrote:I'm curious if ferro-cement is actually better than a rock water cistern.
Chris Dean wrote:Water tank, horray! Any ideas or thoughts are welcome!
We are building a tank to hook up to be fed by a windmill as well as gutters (we have long dry spells, hence the windmill--plus we have a good windmill sitting around not in use, and an unused well by the house too). In addition we have a dozen 40 gallon barrels we'll attach to each other and attach to the new tank. The water will be used for watering plants, and as emergency-only, to-be-filtered drinking source.
We have a guy who's good with rockwork and has built cattle tanks for us before. Planning to coat the inside with thoroseal. Don't know about a roof--will probably have just a simple tin roof with leftover tin, not air tight or anything.
Our plan is to dig down until we hit rock (we are guessing this will be maybe 1-2 feet--it varies around the property from 2" to 4 feet) and lay the foundation there. From the inner base of the tank (where the water will sit) we'll put a pipe going out one foot up so silt/debris will catch in the bottom and not clog the pipe. Hopefully this will be underground (depends on depth of rock) to avoid freezing. This will go to an above ground faucet pressurized by the water in the tank.
That's the plan anyway. We've never built a tank like this before--is there something we're missing? Or anything that's crazy?