Originally Posted by
warbonnetguy
yes, there definately would be a problem there. the way a uq works, moisture passes from you through the quilt, the insulation and out the bottom layer. top and bottom layers need to be about the same degree of breathability. you don't want moisture going in faster than it can escape, otherwise it will build up in the down.
most quilt companies will be using fabric finished with a dwr treatment, this treatment does wear off over time but like mentioned already, you can buy dwr in a spray can to revive it's water resistence.
you can make the bottom layer out of silnylon, but you'd need to make the inner layer out of sil too, i've done this and it works well and really cuts the wind, the problem is you could probably never wash it or dry it so you better hope it never gets wet inside. i think you'd be better off making a sil or cuben cover that covers both sides. or you could make a cover that just covers the bottom of the quilt but you'd need to make sure it fits "baggy" so there's air space between the undercover and the quilt so the quilt has an air space to vent into
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