DIY Radon System Installation
So, Ive done some digging into this already and was just hoping for some confirmation. I'm currently installing my own Radon Mitigation System. The house is older and without drain tile. Beneath the slab in the basement is packed dirt/clay. Based on my square footage of the basement, Ive opted for the RadonAway GX4 fan. Because of the lack of drain tile, I'll have to dig a void underneath the slap so that the system will actually work. Based on the research I have done, the void has to be about 4-5 5-gallon pails of dirt removed.
My question is, with this void, is there any drawbacks to filling it in with river rock? I'm nervous of having that big of a void underneath and pretty close to the foundation footers. With the river rock, in my mind, it would still allow for airflow while giving some support for the concrete slab as well as the foundation footers. Unless I am just being paranoid about it?