Poor coverage also with mesh

[rammx 2]

I try to coverage a medium area but the relay and other zwave device don't have good coverage also with mesh network.

I installed HC2 with HCL (master & slave) on many places on house but don't work properly, I think we need a better antenna.

If I colocated the slave on one side of the house some device don't work also a few meter.

The house was built with blocks (20 cms) with rock decoration the wall in some places, tempered glass, and steel girders.

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[Momos 102]

If those are all the devices in the network then there is no mesh network. The sensors do not act as repeaters, only the relay from the picture will act as a repeater.  You will need to add other mains powered z wave devices to actually have a mesh, 

[rammx 2]

Many relay was installed to try to have better zwave network, why are to poor the zwave signal ?

One more thing if I have a electrical problem with some relay almost all the network will down... too bad!