While the lightening Conductors have been fitted to the roof and the copper conductor put in place down the side of the house, they have not been connected to any earth rods. How many rods you need depends on the resitivity of the ground, which depends on whether it is sandy, clay or whatever. Our friendly Lightening Conductor designer suggested for our soil type we should have 3 earth rods on each side, 2 metres deep and connected across the top with a strip to which the copper conductor is connected with a soldered tag. Fortunately this summer has been miserable and incapable of getting things hot enough to create any thunder and lightening.
On the south side of the house we had put teram and pea shingle down where the decking will go so the conductor assembly will sit nicely under the deck