When installing heat mats in wet areas including shower rooms and bathrooms ( as well as fitting above any mats within 50cm of any sinks or any metallic kitchen appliance) Grounding nets should be fitted on top of the heat mats to increase safety of the system and to comply with UK regulations.

Grounding nets consist of a fine metal mesh 0.6mm thick and are supplied in three sizes: 

• 0.5m x 1.0m
• 0.5m x 2.0m
• 0.5m x 3.0m

Grounding nets should completely cover the heat mat it is laid on top of, secured using staples or adhesive tape and may be cut if required. Each grounding net has a five-metre length of earth cable that should be connected (via the underfloor heating system junction box) to the property’s earth.