Machines can be rented or aerifying services are available for hire. Spikers are similar to core aerifiers in that they make holes in the soil. However, they use solid tines, and thus, do not remove cores. Vertical mowers have rotating blades arranged vertically that can cut into turf and soil. Turfgrass rooting in the thatch is typically torn out, so reseeding is suggested afterwards.
Vertical mowers can also roughen the soil prior to overseeding areas.
Slit-seeders are useful for lawn renovation projects. Slit-seeders combine vertical mowing with seeding. As the machine goes across the lawn, it opens the soil and deposits seed directly into the soil opening. Most slit-seeders have a roller that helps firm the soil after seeding. Since the seed is placed in direct contact with the soil, seeding success is usually high when using slit-seeders.