Make sure your counters are level, true and solid. At every seam or cut you will need to have a support. Never have granite hanging in the air with no support, if you put to much weight on it, it could crack.
After that is done, put a bead of 100% silicone on the top of the cabinets and then put your granite down. Good to go.
Some of the special care requirements for a granite counter top include applying granite sealer.
The cost will vaey on size on your counters and kind of granite. It is about $4.00 per square foot, for black granite 3/8" thick for materials only.
Granite counter tops are large and attached to the lower cabinets, forming a work top. Granite cutting boards are small and rest upon the counter top.
Granite is the most desired countertop today as it is durable and beautiful. On the down side, it is also very expensive and difficult to install if you try to do it yourself.
I would. I use to install granite but now I remodel custom kitchens. Almost every sink in a granite top is a undermount sink. Unless you had a decent undermount sink to begin with that could be reused, I would get a new one.
The answer is in the question. Natural granite and engineered granite are like steak and beefburger. However, engineered granite is probably more practical and cheaper in the long run. See link.
Yes, carpenters can install counter tops.
Granite counter tops are usually sanded and polished to create a smooth surface. A design element that is used sometimes is to keep the edges of a granite counter top rough or unpolished and unsanded to give a more natural look.
Yes, you will have to make sure your granite counter top is properly sealed or it will stain.
It would be easier, and cheaper, to go ahead and yank out the old counter tops. Granite tends to be thick and heavy so you don't want to compromise it in any way. I'd go with the granite only.
Granite counter tops can be wiped down with a wet cloth. However, granite polish can be used to help preserve cleanliness and luster.
Granite counter tops aare not sensitive to the heat normally associated with their use in kitchens. A hot pan will not affect them.