Jun 14, 2020 at 4:12 pm #3652975StumphgesBPL Member
MLD and Zpacks use 0.7 oz DCF for floors. Tarptent and HMG use 1.0 oz. Is 0.7 up to the job?Jun 14, 2020 at 5:31 pm #3652990JCHBPL Member
ZPacks uses 1.0 for the Duplex floor. See the “materials” tab.
This is true for all of their floored shelters I checked and is true of my Duplex.Jun 14, 2020 at 5:32 pm #3652991RSpectator
I’ve always known Zpacks to use 1oz, and on the two I just spot checked, they still do. MLD lists 0.75 for their separate floors, and inner tent floors.
For a while, RSBTR had a 0.8 that had the same laminate as the 1oz, and less fiber – so just as tough, lower tensile strength, which makes sense for a floor.
And there in lies the gotcha with referring to DCF solely by its weight – the fiber content and laminate weight are two separate parameters. Referring just to their combined weight doesn’t tell the whole story.
Between the cottage industry preference for 10z., and the availability of much cheaper alternatives at the same weight, DCF isn’t a compelling floor material unless you really are going for every last gram, and don’t mind the high price and short life span of a lighter grade.
If your concern is weight, but you don’t like the price, you can tape up a polycro sheet in to a bathtub at half the weight, a fraction of the price, and expect a season of use out of it.Jun 14, 2020 at 8:19 pm #3653013M BBPL Member
In my opinion….no.
0.7 is not good enough for floor unless put polycro under it or such, which negates the purpose.
Zpacks uses 1.0. after 80 nights it’s looking pretty haggard. I doubt it maintains its waterproofness, mine have never been put to the test.
I have a Cuben bivy w/0.7, I use a 1 oz ground sheet under it.
30 D silnylon is still the best floor material for UL imo. Bottoms should be 30D, sides can be .7.Jun 14, 2020 at 9:58 pm #3653038Sam FarringtonBPL Member
@scfhomeLocale: Chocorua NH, USA
Re: “Zpacks uses 1.0. after 80 nights it’s looking pretty haggard.”
Thanks for the distinction between fiber and mylar weight in DCF. BPL is a learning experience.
I’ve never had a 30D silnylon floor show any sign of wear, and I think this is because its slippery quality deters punctures, rips or abrasion both under the floor and from within the tent. Note this is only a benefit with floors that are pulled taut at the corners; otherwise, the silylon might tend to bunch up or slip underneath you.
There are different qualities of silnylon. The Dupont 6.6 30D nylon offered by RBTR is 1.3 oz/sq/yd and spec’d at over 3000mm HH, but offered only in the color white. Bought some in Charcoal when they first offered it. But a white floor would help to prevent misplacing or leaving gear in a rolled up tent, so maybe not such a bad idea. A pale green or tan silnylon would be ideal for a floor, were it available in the best quality.
A floor uses a lot less yardage than a canopy, and 0.3 oz/sq/yd is not much of a weight penalty for being able to dispense with a footprint, polycro or other. So why do they use heavy and stiff DCF for floors? Maybe because silnylon has been viewed as too slippery, but with the sil chevrons on the bottom of my sleeping pad, courtesy of Nemo, this has never been an issue. Or maybe it is a question of bonding rather than sewing a DCF floor to a DCF tent. That could be it. But since I don’t use DCF, this is not an issue. Or maybe it’s a matter of not sourcing different materials for a tent, when wholesale quantities of just one material can be bought for less.
Can DCF be recycled after it wears out? That might make a one oz DCF floor worthwhile, if you can afford it and somehow get it rolled up and stuffed into the pack.Jun 15, 2020 at 2:21 am #3653055Roger CaffinModerator
@rcaffinLocale: Wollemi & Kosciusko NPs, Europe
>> I’ve never had a 30D silnylon floor show any sign of wear, and I think this is because its slippery quality deters punctures, rips or abrasion both under the floor and from within the tent.
Agree. I have had a few tiny holes in my blue tunnel, but you should have seen what it was pitched on!
A wet silnylon poncho seems to slide through the scrub. I was expecting damage, but it didn’t.
>> Can DCF be recycled after it wears out?
Define ‘wears out’.
As what normally happens is that it develops lots of tiny holes at the 2-axis creases (which leak), I doubt it.
CheersJun 15, 2020 at 5:59 am #3653067Brad RogersBPL Member
@mocs123Locale: Southeast Tennessee
DCF just doesn’t make since for shelter floors to me. DCF has great tear strength, which makes it good for fly’s, but it’s Achilles heel is abrasion and puncture resistance, two things floors are subject to nearly every use. I wish you saw more DCF shelters available with Sil Floors.Jun 15, 2020 at 11:29 am #3653134StumphgesBPL Member
Thanks everyone. My mistake about ZPacks using 0.8 DCF. Looks like MLD is the only maker (apart from BPWD) using 0.8 oz for floors.
The arguments against DCF floors are rock solid. I wonder why MLD uses the lighter stuff, and I wonder how many DCF floors they sell. My interest is in the lightest possible shelter but obviously don’t wanna stupid light. Henry Shires choosing 1.0 oz for the floors in his Lithium series tends to make me think DCF floors might not be as bad as they would seem, but this choice may have been driven more by marketing/aesthetics than utility/durability.
Apart from weight, friction is the only real advantage of DCF over silnylon. The PU/TPU-inner coating fabrics are superior, but are a bit heavier as well.Jun 15, 2020 at 12:38 pm #3653149jscottBPL Member
@bookLocale: Northern California
I use polycryo under my tent floors no matter what. It greatly lessens abrasion, adds a bit of puncture resistance for your sleeping pads, keeps the tent floor from becoming muddy or as dirty, all for about two ounces. I think it’s worth it. And then a non sil-nylon floor might not be a deal breaker.
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