Re: Concrete Patio
As Tim notes, fiberglass fiber will be visible in the finished concrete, not something I'd recommend for a patio, go with rebar or mesh.
Originally Posted by Timothy Miller
I personally don't like the look of visible expansion joints. Wood joints will rot out over time, the felt won't, but it's a big ugly black thing that sticks out like a sore thumb. IMHO, a felt expansion joint is only necessary when the concrete will be in a confined space, even then it's questionable in most situations. Trex would be a suitable alternative that won't rot an still looks somewhat wood-like.
Striking every 20sqft is a little overkill, one strike line at the center point in both directions will suffice. Use a 1" seaming tool for the job and you'll have no issues. Another alternative would be to pour four individual pads. It's a little more work and draws out the pour time a little, but in the end it's easier because you're doing less concrete at a time and you do not have to seam or use expansion joints because this method of pouring automatically puts those joints in and they will be virtually invisible.
Minimum slab thickness should be 3-1/2". Make sure that it slopes away from the house by a minimum 1/8" per foot and a maximum 1/4" per foot. The surface should be at least 1/2" below the bottom of the door threshold.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!