Cotton vs Polyester vs PVC

[Yurts_latvia]

Nice feedback guys!



So Bob sounds like your poly-cotton painters tarps for walls weren't treated at all - did rain ever come through? Or did they ever go moldy?


TS, thanks a lot for your insights on hemp. Great to understand a bit more about its virtues.


Do you think if was waterproofed it would also hold up well as an outer cover for several years?


My current thinking of my ideal would be to have a single breathable cover like that for the summer (I just love the simplicity, breathability and light penetration of single layer) whilst perhaps the reflective

insulation

and pvc would be a good bet for the colder months.



I think having a pvc cover backup is a nice touch also if there's ever a problem with a more delicate material - you can be sure that stuff is pretty bomb-proof!


+ I wonder about woven materials under snow? Sheeting off drops of rain is one thing but being impermeable to a slowly melting foot of snow - that seems like a tall order!



Thanks all of you

[TSRalex]

Originally Posted by Yurts_latvia

TS, thanks a lot for your insights on hemp. Great to understand a bit more about its virtues.

Do you think if was waterproofed it would also hold up well as an outer cover for several years?

On fact, that I haven´t the experience with hemp as outer shell I need to ask my crystal sphere and got the answer: "YES, maybe better than cotton".

During my evaluations for the right outer wall cover I found in an high-strength polyester fabric, with high UV resistance and a soft-PVC coating on both sides.
Thanks to the special surface sealing, durability and best dirt-repellence are ensured.
Properties:
Weight: 690 g/m²
Max. tensile strength: 3000/3000 N/5cm
Tear strength: 300/300 N
Surface: high gloss, lacquered - many colors
Membrane: flame retardant according to EN 13501-1 and fungicide finish


BTW: An alternative possibility to the - in my previous post mentioned - inner liner with hemp, would be an mold resistant and dirt repellent cotton/polyester mixed fabric, which I found too during my search.

Properties:
Weight: 430 g/m²
Max. tensile strength: 2200/1700 N/5cm
Tear strength: 75/60 N
Surface: only in light sand color available
Membrane: fungicide finish

[TSRalex]

Originally Posted by Yurts_latvia

Do you think if was waterproofed it would also hold up well as an outer cover for several years?

Your question was somehow an incentive for me to look up again briefly regarding the robustness of hemp fabrics and I want to share one interesting link:

Is Hemp Really Stronger Than Steel? How?