I have an old block wall garage with new roof and gravel floor. I would like to pour concrete in it for a new floor. How do I start and finish this project, its 19 x 27. I think it’s 6 2/3 yards
Best answer about New concrete floor in old garage?
Answer by Dan the brick man
make sure your grade is 4 in. lower than your entry point and make it level all the way around…put chalk lines where you want the top of your
concrete to be and nail up some expansion joint where concrete will meet the blockwork…floor drain is optional but always a good idea…set drain an in. low and pour your concrete…of course theres a little more to it than this so unless you know how to finish concrete, you may want to hire it out…
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Do the appropriate framing, have a truck come in and pour, and do a lot of leveling. Or have a pro do it.
First, jackhammer out the old slab. You can get a dumpster, and as long as that is the only thing that goes in, it can be classified as clean fill. That will cost less to have hauled away. Next, Establish your grade. You will want the slab to pitch towards the door, unless you have a floor drain. The pitch is around 1/8″ to 3/16″ per foot of run. If your garage is 27′ from front to back, it will slope 3-1/2″ to 5″ in the total run. Snap a level line along the back wall, and a line with the slope on the side walls. Nail felt expansion along the line. Check the grade on your substrate, and add more sand/gravel if needed. Compact it well with a plate compactor.
If you plan on pouring the garage 4″ thick, which is standard, you need 6-1/3 yards. Order 6-1/2 to be safe. You can either have fiber mesh added to the mix, or lay some 6x6x10 woven wire mesh on the ground. Be sure to pull it up into the pour as you go. Set it in place, strike it off, bull float it, then take a break while it starts setting up. Work the edges with a mag and a trowel, and finish the middle with a power trowel. Cut it, seal it, and then it’s beer thirty. Hope this helps.
If you planning to live in there fro at least 5 years you will need to seal your new concrete(you can get a free estimate at your local concrete company,they usually charge about $ 3/sq.f.)
But to extend your concrete’s life you have to use some seal.Find out here www.creto.net