So many Roofs so little Time

I have a gravel tar roof that needs replacing .What are my options for different roofs I could replace it with .Also do I have to have the gravel and Tar removed ?

Is this on a house or a business? You can lay over if it is one roof and dry. You can go over with just about anything. Another built up roof, SBS modified, APP, EPDM, PVC, TPO. There are a lot of options. T

Remove the gravel , apply a foam board and underlayment per manufacturers specs and cover it with one of many types if low slope nembranes that are on the market