I have just completed a down underquilt and having spent some time doing the calcs I was fairly confident. However when I hold it up to the light I can see there are areas where the down looks very thin.
Is this normal?
I have used 200 grams of 900 fill for an area 2400sq in with baffle height 1.25" (5 baffles)
Any info appreciated.
I was expecting it to be good for 40deg
Keep in mind that fill power ratings are laboratory measurements under ideal conditions. It's been my experience that real world numbers, at least in the humid eastern USA, are 10%-15% lower, especially if you don't wash your quilt often. In my calculations, I use a 12% reduction in the advertised fill power. Your mileage may vary.
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Mike
"Life is a Project!"
Between the idea that FP won't likely match advertised, in the field, and our impulse to simplify and quantify the volume of a cloth object (which we all typically do worse than we think) ... I plan for about 25-30% over calculations and find that works about right.
You need to figure what works for you, but if you went straight by calculations, you are almost certainly light.
Brian
Can you give your quilt an overnight chance to see if it will do the job? And then if you are too cold, is it feasible to open seams and add more down, then sew back closed?
Or maybe down is unevenly distributed in baffles and needs to be gently shaken and allowed to expand after being packed tight
Good luck and let us know your thinking
Thanks for the replies. I decided to sew it closed and have hung it on the hammock and actually it's not looking bad.
So I could be wrong. Like you say P G I'll give it a try I can always add some I guess if it's really necessary.
You might also consider that the fill rating is mostly an average. Also, the down tufts can be very small (if you've got good down) and there may be more down in the areas that don't look like they have down at all.
Actually Scrope, I believe it's the reverse, the larger the tuffs, the better the down.
Brian
You are absolutely correct. What I was trying to convey was that because a single down tuft can be small in the noticeable part but still cover a lot of area, you may not see a lot when you look through the quilt because you're only seeing a tiny part of the tuft because most of the rest of it is so small that you wouldn't really be able to see it. It would look like there is no down there but there may be more than you are seeing. When I said small I was referring to the parts of the down that extends out from the center. They are small in comparison to the center.Originally Posted by Cruiser51
If you literally just finished it, it's probably really clumpy from the filling process. Toss it in the drier on cool with some tennis balls to fluff it up and spread the down. Report back if you still think you are light, but you should be good with 7 oz of 900 fill. I'd say you've even got some overfill in there given your baffle height.
Thanks guys,
Appreciate the feedback.
Mab - good point too I think I'll shake the livin daylights out of it!! Ha ha.
But I'm thinking its prob ok.
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