90 gram /sq. meter for flysheet, (or 50 gram, or..)?

Hi Peter
I am in the process of making a bivi using their 50gsm as the floor. I was really impressed by the stuff when it arrived, it looks really good quality. It looks tougher than the silnylon used by tarptent which my squall is made of which has taken everything I have thrown at it.
I would go with the 50 unless abrasion is going to be a problem in which case I wouldn't use sil nylon.
James

Making a mid out of the 50g/sqm at the moment – take it's Extremtextil your dealing with? (Mine is) Think it's plenty strong for the purpose, I would even consider lighter if it were available. I'd say go with 50. :)

Best regards,
Daniel, Finland

I used the 50g/m2 silicone coated nylon for the flysheet, 90g/m2 PU coated nylon for the groundsheet.

http://www.backpackinglight.com/cgi-bin/backpackinglight/forums/thread_display.html?forum_thread_id=46644

Hello again,

Thank you for the comments. It is Extremtextil from germany I was talking about.

What is a ' mid ' ?

The Westwind and Tadpole by TNF use 70 gram says the official North Face site.
Many manufacturers only put the HH value in the description.

Thanks to your advice, I decided to go for the 50 gr, it has a good colour(dark green) an absolute Must for me,and see if the projects works out well. I'll probably put a 'my first tent project 'somewhere on the internet.

Thanks for the input.

Mid is short for piramid.

I'm also in the process of making my own tent (got my material from Extremtextil as well) and I'll be using 50 g/sqm silnylon for the floor. By itself I don't think that material is waterproof or tough enough (though it is surprisingly strong), but I'm going to give it an extra coating on both sides (using this guide: http://jwbasecamp.com/Articles/Silnylon1/index.html) which should make it more waterproof and as tough as the 90 g/sqm PU nylon. Weight will probably be roughly the same for the PU nylon and the treated silnylon