Making an unserquilt

[Marnoc]

Is it a bad idea to use silnylon for the bottom of an underquilt. I would use non waterproof ripstop on the top that touches the hammock.

[Double]

Depends. I went against conventional wisdom and used silpoly on the outside layer of mine. With living in Kansas I have to contend with 20+ mph most of the time. Even more so when camping out at the state lakes. That and I don’t use it more than two nights in a row, so I haven’t had condensation issues. If I lived in other conditions or was hiking with it I would of went the tried an true route. I’m in the process of making another one for hiking. Recently finished one for my girlfriend so taking a little break.


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[mathineer]

One idea to consider, is to use breathable material for the underquilt, but then make a waterproof underquilt protector. It's a bit more expensive, but it will pack really small, weigh next to nothing, and you can use it or not depending on conditions.

mathineer

[MiteyF]

I'm just finishing up a hammock/UQ/TQ project, and I'm trying an experiment. I've essentially added a permanent UQ protector to my CDT UQ made of some random waterproof 1.1 fabric I had laying around. We'll see how it works.

[Carrico]

But what would the difference be between a waterproof bottom layer on the quilt its self as opposed to wrapping the whole quilt in waterproof fabric?

[Marnoc]

But what would the difference be between a waterproof bottom layer on the quilt its self as opposed to wrapping the whole quilt in waterproof fabric?

good question

[crasmussenjr]

I did a breathable fabric for the interior of my recent underquilt and top quilt build. For the exterior fabric I did silnylon on both. This was a synthetic build. My logic was an underquilt protector or a sock is pretty much the same thing as using a sil fabric on the exterior. When I do my summer quilts in a month or 2 I’m probably going to not do sil for the topquilt but will still do it for the underquilt.

[Kayak_Medic]

But what would the difference be between a waterproof bottom layer on the quilt its self as opposed to wrapping the whole quilt in waterproof fabric?

Main difference being with the UQ protector, you can improve breathability of the UQ by only using it when conditions warrant it. Also, the UQ protector wouldn't be completely snug against the UQ, so it would still allow some breathability through the bottom layer for condensation to escape.