It can last as long but there are some limitations. Large cracks in the original surface can reflect through the new and if there are any base problems you cannot improve them. This is a new surface.

It can eliminate puddles but if there is not an adequate slope it cannot make water run. Think of it as a large blanket over your existing job, everything is the same, just higher.

- The most important thing is a good base.
The base supports the asphalt. 

- Proper grade and slope of the base. You always want water to flow properly.

- The asphalt should be at least 2” to 3" thick for new paving

and 3" to 2 1/2" thick for layers.

- For resurfacing, the asphalt should be a minimum

of 1 1/2" to 2".

- Layout is important for good use of the pavement and

traffic flow. 

- Installation is important. Choose a qualified company with experience to do the job right.

No, but you do have to make sure you have enough after it has been cut to grade. Many times all the stone is removed to make the water flow and it leaves you with no stone under the asphalt. Make sure you have 6” of stone after the job is graded before you apply the asphalt.

First if you have a very poor base you should not, I will not last very long. Secondly, if it will create a drainage problem like making water run into a building and third if you are not willing to accept reflective cracks in the new surface.