I want to make a large circular pot out of sheet metal that can hold water. How should I construct it so that it has a circular bottom and ensure it is leak-proof.
Boiling water will be poured into this pot.
Thank you
Water – How to fuse galvanized sheet metal with a circular bottom together so that it is water tight
metalwaterproofing
Related Solutions
You can make watertight trays from flat sheet metal without soldering or riviting.
Take a sheet of metal whose
- length is the length of the finished tray plus two time the height of the sides;
- width is the width of the finished tray plus two time the height of the sides.
Fold the sheet so it ends up looking like this:
You can fold up one side at a time using a piece of wood (maybe 1x2), a bit shorter than the length of the side you are working on, as a bending edge.
Work around the piece, clockwise or counterclockwise.
You will have to work the angle fold in the corners as you move to each successive side. The angle corners will point outward initially. Then you bend them inward toward the short end.
All edges will end up at the height of the sides with no seams. The easiest kind of waterproof.
Based on questions answered in chat you have a case where the contractor didn't measure the deck properly, and built it too high, could not flash properly under the door frame, and performed a "some genius" move putting a transition strip (meant for interior use) over top of the door frame and the vinyl, with caulk under neath.
Stupid.
Two options: 1 cheap and temporary, 1 expensive and proper.
Cheap: Use proper caulk (props to @tester101)
Option 2 - and the door is old so this isn't actually a terrible idea.
Replace the door. In the process, raise the rough opening of the door frame half an inch or so - however much is necessary to be able to put a proper piece of flashing under the door frame and over the vinyl.
You will probably have to custom order a door to fit your new rough opening, but at least you can seal the door area properly.
And props to @bmitch for pointing out that flashing needs to run the entire width of the deck.
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Best Answer
Soldering is the usual method, but without metal-forming equipment I'd guess you don't have, that's not going to be a likely (or affordable) road to success for someone with no experience, for any value of large.
Buy a galvanised washtub or trashcan is the direct, simple route to a watertight circular metal "pot" over a wide range of sizes. Move into "stock watering tanks" for a larger size, though most of those are more oval. Without exhaustive shopping around:
17 gallons, $30:
31 gallons, $19, with lid:
This one is 477 gallons, circular, and costs $219.
Now I've gone and started to think that would make a nice country-style hot tub, and the price is so right...