I'll assume you are doing a two piece cover- wall and roof.
First, the wall. I'll assume you will sew vertical seams on the wall cover. For a 14' yurt that is 44' in circumference, you need 9- 5' (60") wide pieces of fabric the height of your wall plus 3" extra for top and bottom seam. Add on to that wall height number how many inches you want the wall to drape down over the floor frame on the outside. Plus add another 5% for shrinkage.
If your fabric is different than 60" width, REDO THE MATH. 9 pieces will NOT be the correct number if your fabric isn't 60" wide.
As for the roof footage, using a compass graph out the roof diameter on 1/4" graph paper.
To get the actual yurt cover roof diameter, double the rafter length. Add the ring diameter, and add an additional 4'. That will give an overlap of two feet all around the wall. Why so much overlap? The cover will shrink about two feet total, plus a perimeter seam allowance is neesed.
Compass out that diameter on the graph paper. Then using the width of your fabric bolt, lay out the courses to cover the diameter. Round up to the nearest whole number for seams and allow 1.5" per seam as well.
Sew the tarp.
You need to turn that 'tarp' into a proper conic shaped yurt cover. To do so, cut from the *center* of one side -parallel with a seam-to the focal point of the where the roof ring will go. That's the center of the 'tarp' you just made.
Simply lay the roof 'tarp' atop the yurts rafters until the focal point -where the cut stops-is in the middle of the roof ring. Overlap the cut edges until the tarp fits snug to the rafters. See, now it is conic in shape. Easy, huh? lol
Mark up a 1.5" seam allowance at the new seam line. Use the side of a rafter for a guide for your Sharpie. Make witness marks every foot of the lap for alignment during sewing.. The more you mark up the seam, the better when you sew it, believe me.
Again, allow at least 1.5" for SEAM ALLOWANCE!! Mark the ring hole while you got it up there, several inches inside the ring hole!
Cut out the hole. Flat fell the seam. Sew the snot out of that sucker.
Reposition the cover atop the yurt and align it with the ring hole. Admire the fine job you just did. See how nice and snug it fits?
Now that the fabric fits the roof, you can make your final marks for the ring. DO NOT CUT IT TOO SMALL! Ya gotta have a plan here to know how to proceed. I just stitched loops at the roof hole and tie off the cover to screw eyes screwed into the bottom of the ring. Otherwise, ya gotta know what you are doing. Sew do it. lol
Mark the perimeter. All that extra length is gonna shrink, I guarantee. Do *NOT* cut it too short!! It's gonna shrink! BIG time!
Have fun.
Hello peeps... Can I pick your brains...? :P
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