I live in a townhouse condominium. This summer, we are going to repave the parking area. Our original phone, cable, low-voltage type stuff was installed through the buildings in the basement ceiling during construction. As times have moved on, it would be nice to maybe upgrade the wiring, but going through 10 units to get to the other end is just not going to happen.

So, I'm suggesting that we install some conduit under the pavement when we tear things up to regrade and then repave. It sounds like we'd need to run individual runs for each unit. The longest would end up at about 200'. To enable say RG6, or a phone line, or maybe a fiber optic cable to be fished through the thing, what would be the recommended size? Would it make sense to try to blow a pull string through each, or just wait until it needed to be used.

They've installed fiber optic on the road, but won't bring it into the complex since there's no easy way to get it to individual townhomes. Plus, the old cable coax is just that, getting old, and mostly RG59, where RG6 works better.

Thoughts on what would work underground, size, material?