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Depending on your location, build a planter. This included the base and the wall surrounding it. You could do a traditional rectangle or something modern like these...

The easiest way to insulate concrete block is to glue foam insulation board directly to the block. These boards come in 4 ft X 8 ft sheets and different R values. The other method is to build a wood or steel stud wall along the block to hold blanket style insulation along with electrical wiring etc. This method is a lot more work, but gives you a base to ...

This website has a good explanation of hydrostatic forces on a dam surface. You could build your wall with a submerged lip to help counteract the moment applied by the water pressure on the vertical face of the wall. Image from TheConstructor.org I did some quick calculations and got the following: So to sum up my incoherent scribblings, assuming a 30 ...

http://en.wikipedia.org/wiki/Cinderblock - easy way to describe this one. They're just concrete blocks that stack together (much like legos). They're held together with mortar like bricks. They're very common for foundation work in the US.

Unbelievable good math for a block wall, but I think Jim is only going to have one block on the ground at the top of the pond. The liner itself is very strong, and once laid up and over the block, that block is not going anywhere. Not only would 6 inches of water have to move the block, but stretch the liner the same distance as moving the block. The most ...

Since concrete blocks are fairly thick, I'd drill several holes along the line you want to cut with a masonry bit, then use a use a mini jack hammer such as a small DeWalt with a 1/2" chisel bit. The hole will not be perfect shape etc, so you will need to fill around the vent after installed with some mortar. The pilot holes will help keep the hole in a ...

Berkeley, CA has a tool library for just this kind of rental. Major home stores have rentals, and there are chains of rental shops like Hertz Rentals. You'll need a drill, a masonry bit, and a concrete anchor. Your local hardware store can supply the last two. Each anchor will have a specified hole size. The ceiling is almost certainly not cinderblock. ...

You could make a small seating area with benches made from cinder blocks and blocks for side tables; it'll be nicer if you top the cinder block structures with something comfortable to sit on. A quick web search turned up: cinder block furniture projects, hand make outdoor furniture A smoker might work, but the blocks are very porous; you're going to ...

You could use an epoxy coating (similar to what you use on a garage floor) - they are thick enough to give a smooth coat on cinder block. You would need to first morter/plaster the seams to get them smooth. There are also concrete compounds intended for use on vertical structures (see concretenetwork.com for examples) - that can give a very nice appearance. ...