I Have A Flat Roof And It Is Leaking. How Do I Repair It?

You don't mention what type of roof you have, the age or if the kitchen roof is connected to the rest of the house.  I am thinking that you probably have tar and gravel on your flat roof.  If it is ten or more years old. It would be a good idea to do a tear off and check to see if any or all of the sub-roof needs replacing.   Since you are asking for advice on how to repair it yourself, I am assuming that you don't want to hire a roofing company.   If your roof is tar and gravel, you can scrape it off with a flat edged shovel, (it is a lot of work), but once you have the old top portion off, check to see if any of the plywood sub-roof needs replacing. (You'll need a janitors broom to sweep the sub-roof off with, to clear any loose bits of gravel off). If you see any deterioration in the sub-roof, replace those pieces, then you can lay felt paper, but you will need to overlap the felt at least 8 inches per line. Make sure to over lap the same where each roll ends. You will n