An aircraft floor assembly for use with an aircraft subfloor, the aircraft subfloor being configured to access one or more access panels, compartments, or items underneath the aircraft subfloor, the aircraft floor assembly comprising: an underlayment layer comprising: an underlayment magnetic layer including a first magnetically-responsive material and further including a first adhesive on an underside of the underlayment magnetic layer for attaching the underlayment magnetic layer to the aircraft subfloor; and an underlayment sublayer comprising closed cell board between a second magnetically-responsive material and a third magnetically-responsive material, wherein the second magnetically-responsive material is coupled to an underside of the closed cell board by a second adhesive, wherein the third magnetically-responsive material is coupled to a topside of the closed cell board by a third adhesive, wherein the underlayment sublayer is configured to attach to the underlayment magnetic layer via magnetic attraction between the underlayment magnetic layer and the second magnetically-responsive material of the underlayment sublayer; and a decorative layer comprising a magnetic layer, wherein the magnetic layer is adjacent the third magnetically-responsive material of the underlayment sublayer and attaches the decorative layer to the underlayment layer, wherein a combined weight of the underlayment layer and the decorative layer is less than or equal to 15 kg per square metre (three pounds per square foot), wherein the underlayment magnetic layer is cut to the configuration of the aircraft subfloor to allow access to the one or more access panels, the compartments, or the items underneath the aircraft subfloor, and wherein the decorative layer and the underlayment sublayer are configured to be selectively removable to access the one or more access panels, the compartments, or the items underneath the aircraft subfloor. an underlayment layer comprising: an underlayment magnetic layer including a first magnetically-responsive material and further including a first adhesive on an underside of the underlayment magnetic layer for attaching the underlayment magnetic layer to the aircraft subfloor; and an underlayment sublayer comprising closed cell board between a second magnetically-responsive material and a third magnetically-responsive material, wherein the second magnetically-responsive material is coupled to an underside of the closed cell board by a second adhesive, wherein the third magnetically-responsive material is coupled to a topside of the closed cell board by a third adhesive, wherein the underlayment sublayer is configured to attach to the underlayment magnetic layer via magnetic attraction between the underlayment magnetic layer and the second magnetically-responsive material of the underlayment sublayer; and an underlayment magnetic layer including a first magnetically-responsive material and further including a first adhesive on an underside of the underlayment magnetic layer for attaching the underlayment magnetic layer to the aircraft subfloor; and an underlayment sublayer comprising closed cell board between a second magnetically-responsive material and a third magnetically-responsive material, wherein the second magnetically-responsive material is coupled to an underside of the closed cell board by a second adhesive, wherein the third magnetically-responsive material is coupled to a topside of the closed cell board by a third adhesive, wherein the underlayment sublayer is configured to attach to the underlayment magnetic layer via magnetic attraction between the underlayment magnetic layer and the second magnetically-responsive material of the underlayment sublayer; and a decorative layer comprising a magnetic layer, wherein the magnetic layer is adjacent the third magnetically-responsive material of the underlayment sublayer and attaches the decorative layer to the underlayment layer, wherein a combined weight of the underlayment layer and the decorative layer is less than or equal to 15 kg per square metre (three pounds per square foot), wherein the underlayment magnetic layer is cut to the configuration of the aircraft subfloor to allow access to the one or more access panels, the compartments, or the items underneath the aircraft subfloor, and wherein the decorative layer and the underlayment sublayer are configured to be selectively removable to access the one or more access panels, the compartments, or the items underneath the aircraft subfloor.