wool upholstery fabric as insulation/covering?

I have access to a decent supply of this fabric on 48" rolls:
https://kvadrat.dk/products/1200?colorway=0462

It is a 100% new wool, but isn't designed to be insulation. It feels about the same weight as wool coat fabric, maybe a little thicker. Like a kilt.  A yurt-sized kilt. I can get it at $3 a yard, or maybe less if I buy it all.

Here's the burn test certificate for it:
https://static.kvadrat.dk/assets/pdf...l-117-2013.pdf

Would this be good for an insulation layer, and if not, would it be a good inner layer? I happen to like orange-yellow a lot, so that's lucky I guess.

I went ahead and bought 120 yards.  Its about 250lbs I guess?  



Its about as thick as an army blanket and smells faintly, pleasantly of llama.  I hope this will make a decent inner liner!

Traditional yurts used felted wool, so it definitely insulates. Will it be exposed to rain? Depending on how warm you need to keep things, you may need/benefit from multiple layers. Do you have a picture/plans of what you're trying to cover/insulate?

OK, I tend to blow my buffer when doing math without an actual piece of paper and a pencil, but a single layer on standard 8 ft wide by 20ft long by 8 ft tall trailer would use that much fabric unless I totally blew it. If you're thinking ceiling insulation, I'd definitely want multiple layers, not to mention the floor - I was amazed how much nicer our trailer was when I fit carpets on a bunch of the floor due to the insulation factor.

That said, that's a great price. Yes, you need to consider the weight - wool is heavy compared to things like styrofoam, but you won't get toxic fumes if it lights on fire or off-gassing the rest of the time!

Thanks, Jay.  I am considering a yurt with 7' high walls and a 45 degree roof pitch.  The max size I've read is feasible is a 30' yurt.  So let's use that as a stretch goal.

That's ~30yards for the wall circumference, x2 because my fabric rolls are 5 feet high, so 60 yards of fabric.  The roof is another 60 yards.   That basically uses up everything I have for one layer of wool membrane around the yurt.  I intend to have another insulation in the middle (perhaps reflectix or bubble wrap) and a third shell fabric.  Maybe cotton canvas treated with boiled linseed oil.  Not sure yet.

I originally asked this question because I was trying to figure out if wool upholstery fabric is even acceptable as an insulative layer.  But I have since decided it is quality fabric and has a place in my yurt, so there's no harm getting it either way.  Now the question is morphing into, what else do I need?  NC is quite rainy.

Do people use felt for the roofs?  is the roof insulated?  I have more learning to do.

The people I know who had a yurt here had some sort of artificial material on the outside and a friend said leaking was a major issue after fewer years than would have impressed me. They used the foil-covered bubble wrap between the rafters and the roof material. I'd have to go and look at what they did with the walls. I don't know if they insulated the floor at all, but I heard from a different lady who was renting a "summer cottage" year round, that insulating the floor even in our "moderate" climate is important for comfort.

I like the idea of canvas water-proofed with linseed oil. Does the "boiling" part stop it from going moldy? As I learn more about linseed oil's abilities, I'm getting more impressed with it, considering it's something that can be locally grown and processed without crazy unique equipment. "I know enough to know I don't yet know enough!"

Consider that humans and cooking give off a lot of moisture, not to mention coming in in wet clothes at times. You need to know what will happen to that moisture. If it's warm inside, the moisture will condense on the first "cool surface" it gets to. Modern homes prevent rot in the walls but putting plastic up and "sealing" the home, but that can create indoor air quality issues. Choosing a suitable place for the water to condense and run down to where it won't cause mold or rot is the critical step, and then having a way to check if that's indeed what's happening, would be helpful.

I'll ask my friend more about the yurt if you think the info would be helpful for you.

Those are really great things to consider!  thanks.  If it's convenient for you to ask your friend I'm curious, but also you've given me enough to ponder to keep me busy for now. :)