Tyvek groundsheet.

ctznsmith · Post by **ctznsmith** » Sun Feb 28, 2016 3:48 pm

The easiest myog?

Room for two hopefully 1.4m x 2.3m tapered to 1.2m to fit under my Silwing.

Packs down to beer can size.

and is under 200g.

Do I bother adding something so you can peg it out? Probably won't.

Stumpym4 · Post by **Stumpym4** » Mon Feb 29, 2016 9:18 am

Wheres the best place to buy this from ? , as wouldnt mind making one for my mini peak 2
Cheers in advance

GregMay · Post by **GregMay** » Mon Feb 29, 2016 11:43 am

Stu was sourcing me some...not sure where he's got to with that?

Bearbonesnorm · Post by **Bearbonesnorm** » Mon Feb 29, 2016 12:48 pm

Stu was sourcing me some...not sure where he's got to with that?

I have it, that's where Ben got this ^ from. Many apologies for being shoddy and forgetting to let you know I now have the worlds biggest supply of Tyvek in various types.

Artie Fufkin · Post by **Artie Fufkin** » Mon Feb 29, 2016 5:09 pm

What types are you currently holding then, Stuart?

Bearbonesnorm · Post by **Bearbonesnorm** » Mon Feb 29, 2016 5:35 pm

What types are you currently holding then, Stuart?

Tyvek - Paper - like feel but very tough. Sold as waterproof and breathable but I consider it very water resistant as heavy direct pressure from a knee or elbow can push water through if it's on saturated ground. Cuts easily with scissors and doesn't fray. Bit crinkly at first bit softens up with use, non-slippery. 140cm wide and 90g per meter.

Permavent - Feels more like material. 100% waterproof and breathable. Cuts easily with scissors, sew's okay and doesn't fray. non-slippery. 100cm wide and 92g per meter.

ctznsmith · Post by **ctznsmith** » Mon Feb 29, 2016 7:35 pm

Stuart I meant to message you I think the Tyvek - paper is actually 140cm wide not 150 (well the bit you sent me was).

firedfromthecircus · Post by **firedfromthecircus** » Mon Feb 29, 2016 7:51 pm

Bearbonesnorm wrote:
What types are you currently holding then, Stuart?
Tyvek - Paper - like feel but very tough. Sold as waterproof and breathable but I consider it very water resistant as heavy direct pressure from a knee or elbow can push water through if it's on saturated ground. Cuts easily with scissors and doesn't fray. Bit crinkly at first bit softens up with use, non-slippery. 150cm wide and 90g per meter.

Permavent - Feels more like material. 100% waterproof and breathable. Cuts easily with scissors, sew's okay and doesn't fray. non-slippery. 100cm wide and 92g per meter.

And is this for sale?

Bearbonesnorm · Post by **Bearbonesnorm** » Mon Feb 29, 2016 9:02 pm

Stuart I meant to message you I think the Tyvek - paper is actually 140cm wide not 150 (well the bit you sent me was).

Sorry about that Ben, I never actually measured it, just went off the spec'. Was it still wide enough for you or do you need more?

And is this for sale?

It is. I haven't added it to the shop yet (later this week) but if you need some asap, give me a shout.

ctznsmith · Post by **ctznsmith** » Mon Feb 29, 2016 9:40 pm

Bearbonesnorm wrote:
Stuart I meant to message you I think the Tyvek - paper is actually 140cm wide not 150 (well the bit you sent me was).
Sorry about that Ben, I never actually measured it, just went off the spec'. Was it still wide enough for you or do you need more?

140cm is fine, possibly even better.

whitestone · Post by **whitestone** » Mon Feb 29, 2016 10:28 pm

How water resistant is the Tyvek? Good enough for an emergency cover?

90 grams per square metre or per running metre?

Bearbonesnorm · Post by **Bearbonesnorm** » Tue Mar 01, 2016 9:49 am

How water resistant is the Tyvek? Good enough for an emergency cover?

Plenty good enough Bob. It's only something like kneeling hard on it that can push water through and then only if the ground is soaking. Rain just runs off.

90 grams per square metre or per running metre?

Running, 1m x 1.4m weighs 90g.

HaYWiRe · Post by **HaYWiRe** » Tue Mar 01, 2016 10:54 am

Given how light and cheap tyvek can be, is there any reason why its not used more for cheap tarps/shelters?
I see loads of ultralight groundsheets but only a few bivis or tarps...

I mean its not the only fabric (paper??) that can't be sewn?

Bearbonesnorm · Post by **Bearbonesnorm** » Tue Mar 01, 2016 11:13 am

Given how light and cheap tyvek can be, is there any reason why its not used more for cheap tarps/shelters?

No reason at all really. I wonder whether it's the look of the stuff that puts people off?

Ray Young · Post by **Ray Young** » Tue Mar 01, 2016 12:08 pm

Bearbonesnorm wrote:
Given how light and cheap tyvek can be, is there any reason why its not used more for cheap tarps/shelters?
No reason at all really. I wonder whether it's the look of the stuff that puts people off?

I made a bivi bag out of it once and it worked fine until I went to get out of it one morning and a small tear quickly turned into a very big tear. If I had made a better job of hemming it then the original tear may not have appeared at all.

Gari · Post by **Gari** » Tue Mar 01, 2016 12:33 pm

I have been looking at a locus gear Khufu, in Tyveck. Pretty light and cheap. A lot less than the Cuben version, with not much extra weight.

Trigs · Post by **Trigs** » Sun Mar 06, 2016 10:52 am

I use this as a groundsheet also. Even kneeling on it, ive not really felt the water come through. I find it also helps to give it all a good crumple/squash as it makes it less crinkly/noisy.

If theres any building sites near you putting up kit houses (wooden frames), it might be worth asking a joiner if they have any. Its used as a barrier between the kit and brickwork, and on roofs too i think.
(Mod, Feel free to delete this part

)

johnnystorm · Post by **johnnystorm** » Sun Mar 06, 2016 2:22 pm

The tyres sheet that came with my SMD Wild Oasis said you could put it in the washing machine to soften it up a bit. (I don't think I dreamt that....)

Just checked, it said wash without soap...

Bearbonesnorm · Post by **Bearbonesnorm** » Wed Mar 23, 2016 9:13 am

Tyvek and Permavent now listed on the shop: http://www.bearbonesbikepacking.co.uk/s ... at=shelter

whitestone · Post by **whitestone** » Wed Mar 23, 2016 10:29 am

How easy is Tyvek to sew/attach tie-out points? I'm not looking at hammock strength but just enough to attach guy lines at each corner.

Bearbonesnorm · Post by **Bearbonesnorm** » Wed Mar 23, 2016 5:14 pm

How easy is Tyvek to sew/attach tie-out points? I'm not looking at hammock strength but just enough to attach guy lines at each corner.

Permavent sews easily Bob, as long as you double up on material / create a hem, it should offer enough strength for tie-outs. The Tyvek won't sew as well ... it will, just not as well

whitestone · Post by **whitestone** » Wed Mar 23, 2016 5:40 pm

Bearbonesnorm wrote:
How easy is Tyvek to sew/attach tie-out points? I'm not looking at hammock strength but just enough to attach guy lines at each corner.
Permavent sews easily Bob, as long as you double up on material / create a hem, it should offer enough strength for tie-outs. The Tyvek won't sew as well ... it will, just not as well

A bit of searching (I've been on prepper sites

) and it seems that tying a line to the corner with a Sheet Bend works. That might be enough. There are also adhesive grommet/tie-outs which might be an option. Will need to get some ordered once I'm back from the Braunton 150 and have a play

mtbmarkymark · Post by **mtbmarkymark** » Wed Apr 13, 2016 11:45 pm

I've made a Tyvek footprint to protect the groundsheet on my Lunar Solo
after reading up on it I used pva glue to hem it all the way round the edge.
You end up with 3 thicknesses at the corners
I then just hole punched it to add my "guys" made from kite string
surprisingly the pva is holding well with use.

richvs · Post by **richvs** » Fri Apr 15, 2016 9:00 am

Mark;
I've used a similar method when hemming fabric for kite tieouts.
To avoid the fabric pulling through I capture some thin line inside the hem before folding to spread the load over more than just the hole.
Then punch or sew just inside the captured line so the guy pulls the line and not the fabric.

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