Should I overlap two G-Floor mats together? A Should I overlap two G-Floor mats together? Overlapping two mats is possible, but not recommended. If you have two mats, we would recommend trimming to fit and using either center trim or seam tape. Share facebook twitter linkedin pinterest email Back to Top What floor preparation is needed other than cleaning? Are there tools or any other materials, i.e. adhesive, trimming, seaming or other sundries needed to join mats or finish edges? Can G-Floor roll out flooring be used outdoors?