King Electric FCM Floor Mat - Manual (Page 16)

King Electrical Floor Heating Cable Installation Manual 16
6.6 DO NOT leave gaps between mats. Heat will only radiate
out approximately 2” from the cable.
6.5 To ensure maximum coverage of the floor, it will likely be
necessary to cut the mesh of the mats to fit odd-shaped areas,
such as corners or working around various angles or cabinets.
Examples of the different techniques you may need are described
below.