Flat roofs usually come with a 10- to 20-year warranty but the roofs can last 25 years if properly installed and maintained. The traditional hot-tar-and-gravel roof is built from three or more plies of waterproof material alternated with hot tar and ballasted by a layer of smooth river stone.
Common herbs are mint, rosemary, and thyme. The American Spice Company sells herbs made from both fresh and dried leaves, while many of our spices curate from seeds, bark, fruit, flowers, and roots. Use herbs in cooking, aromatherapy, medicines, and cosmetics.
Examples of herbs are basil, parsley, rosemary, thyme and dill. Note that for each of these, we're talking about the green or leafy part of some kind of plant. In the case of basil, the leaves can be quite large, whereas rosemary leaves or more like spines. Still, each is the leafy or green part of the plant and thus an herb.