Suspended slabs are ground floors that are not in direct touch with the soil. They are commonly used to construct floors for a house's upper levels, but they may also be set on top of pre-built walls to make a floor. The slab is supported only by its edge against the wall or another slab. Floors built using this method cannot receive direct foot traffic because there are no nails or other fasteners holding the boards together. Instead, rubber feet or metal spikes are used to keep the slab from being pulled off the foundation. Floors made from suspended slabs can be any color, as long as it is well blended with the surrounding material. The color doesn't have to match the original wood used to build the house either. Often, builders will use darker colors for the suspended slabs and lighter ones for the rest of the floor. This way, part of the room will always be light and airy, even when the rest is being used for cooking or entertaining. These types of floors are popular in remodels because they provide a level, flat surface without damaging the existing structure or yard. They're also great for rooms where you want to preserve the look of the original floorboards while still making them more functional. There are two main types of suspended slabs: tongue-and-groove and half-lap.