Floor for a cuben tent

I started out with the tyvek sheet with my hexamid and that kinda wore out so i eventually sprang for the cuben sheet. Most people will say cuben is not the best for a groundsheet but with the netting floor under the cuben that helps and little bit. I don't have yet but i expect holes at some point and for that i just got some of zpacks cuben repair tape..

To me netting under a cuben floor seems redundant. Sewn in seems better.

60" x 96", trim to fit
3.5 ounces
$6.50

Bright
Durable
Reflective

I'm curious too – I think it will help by comparing each material against multiple factors: Weight, Packable Size, Cost, Water-Resistance, Durability.

I'll start off with what I can contribute from a quick search, but hopefully someone more informed can make this more comprehensive:

1) Tyvek (4-7 oz – heavy)[not expensive]
2) Polycro (1.6 oz) [slippery? – but not expensive]
3) Silnylon (oz = ?) [Not water resistant unless treated]
4) Cuben Bathtub [2.7-3.3 oz – Expensive]
5) Emergency Blanket (?)

if you can get the 1.1 tyvek lawson was selling a while back, thats lighter than the cuben.
make a bathtub floor and tie in just like the zpacks floor.

the mesh provides a lot of protection for the groundsheet, and insure groundwater runs under it pretty much.

emergency blanket is about as light as it gets.

all depends on how much rain you expect really.

In dry forecasts, I take 1 oz mylar emergency blanket, with rain forecast, I take my cuben groundsheet.

Although the emergency blankets I've tried are light, they are more fragile than other options.

Cuben is light and durable for it's weight, but polycryo is a hell of a lot cheaper. The lighter version of Tyvek is easier to work with, more durable and only a little heavier than polycryo.

They are all slippery, which can be fixed with some silicone diluted with paint thinner dots applied.

So depending on your requirements….

NO!!!! Do not use a space blanket. There are super noisy and crinkly. If a breeze blows through in the night, the noise will wake you up. Just don't.

The generic "emergency blanket" term used above introduced significant ambiguity.

There is a big difference between an 1 mil single layer mylar "space blanket" and the heavier, multi-layer "survival blanket" I referenced above.

When cut to size, the "survival blanket" is about the same weight as .75 cuben, far more durable, quiet, and cheap.

Mylar blankets can be noisy. The AMK blankets are polyethylene and noise is not a problem.

Another vote for the AMK blanket–or bivy. The bivy is much lighter (and cheaper) than a sil nylon version and gives you a double duty option–can be used as a ground cloth (sleep on top) or a VBL inside a sleeping bag/quilt. As a VBL it adds quite a bit of warmth to your sleep system (10-15F) if you can handle the increased humidity inherent to VBLs. The AMK material is better/quieter than mylar IMHO but you will still have to replace it once or twice a season–depending on use.