The cable in my house doesn't seem to react too well with HD signals. So I'm ripping the old lines out of the walls and installing/fishing new cable. Any suggestions on the type of cable I should be installing into the house?

The cable in my house doesn't seem to react too well with HD signals. So I'm ripping the old lines out of the walls and installing/fishing new cable. Any suggestions on the type of cable I should be installing into the house?
RG6 - altho I'm not sure what you mean by not reacting well. At the RF level there's not much diff between analog and digital signals on coax. If the old cable worked previously it should work for HD as well.

I think you would be mich better off if you install an amplifier/cplitter combo where the cable comes into your house and possibly change the cable ends for the line going to your TV.
Do you have any signal strength problems with analog tuners such as snow ghosts etc? What symtoms are you having with SD or HD digital channels that make you say the cable does not react too well?
Are you using any splitters that do not pass all frequencies with equal strength?

a) what grade are the "old" cables? Maybe they don't need to be replaced.
b) what HD signals? Cable TV, satellite or an Antenna?

Do you have any signal strength problems with analog tuners such as snow ghosts etc?

The TV's that aren't behind the digital tuner don't seem to have a problem. They can't access the higher channels though.

What symtoms are you having with SD or HD digital channels that make you say the cable does not react too well?

After checking it seems I was wrong. Some channels that aren't high def have massive problems with pixelation and aren't watchable. The problems seem to be localized to certain channels. Massive pixelation, loss of audio, etc. One channel will work flawlessly while another won't work at all. I'm looking at some channel called TCM which is in standard definition and I get an almost completely black screen with the occasional pixels. When I was recording nova and a couple of other programs on the national geographic channel it worked fine for a while and then the screen would freeze, audio would give out and there would be pixelation. Then everything would go back to normal.

Are you using any splitters that do not pass all frequencies with equal strength?

The splitter was professionally installed by insight communication 10 years ago and the cable lines are about 20 years old. I've been told that the professional said we were "losing too much signal at the higher frequencies".

b) what HD signals? Cable TV, satellite or an Antenna?

This is insight digital cable.

If the cables, splitters, etc were installed by Insight, it's probably best to call Insight to come to diagnose and resolve. There should be no charge to you.