Seems, with the extremely dry air out here in the southwest I need a groundcloth to keep my tent floor (Contrail) from getting very dusty/dirty with the "talcum powder" type dust we have compared to back east.
So, I'm back to using clear contractor 1.5 mil thick plastic sheeting cut 2" smaller than my floor dimensions.
Once I made a plain ripstop groundcloth for a hooped REI SoloLite. I sewed small hems W/ loops of elastic cord at each corner to loop over the tent stake pullouts. Worked well back east.
Should I be looking at uncoated ripstop? Silnylon? (Tyvek is not a contender. It's a debris magnet.)
"There are no comfortable backpacks. Some are just less uncomfortable than others."
“Is that GG Polycro material tougher than standard 1.5 mil plastic drop cloths? If so I think that's what I'll get.”
Some more thoughts. Yes it is tough. After a few years, I have no pin holes. It is getting stained. It picks up ground moisture soooo easy; so I pack it away in the morning wet and dry it out in the afternoon.
You can get the same stuff at Lowe’s, Home Depot, or Menard’s. It’s called Indoor Window Shrink Film. You heat it to seal to your window. That’s why you don’t want to store the ‘ground cloth’ on the outside of your pack or it shrinks.
If you want stronger yet polycro, get the Outdoor Window version. The weight will go from 1.5oz to 2.5oz for your footprint. Now we’re talking overkill.
This is how I got a big enough polycro for my TT Rainshadow.