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How Much Fabric Do You Need When Using Our Triple Pinch Pleat Tape?
Last Updated: 12/10/2009
Follow the formula below to determine how much fabric and lining you will need to make triple pinch pleat drapes with our triple pinch pleat tape. There are a few steps here... just take it one step at a time and fill in the blanks and you'll end up with the exact amount of fabric you'll need for each drapery panel.
 
The pleating tape uses 5 1/2" of tape to create the pleats and there is 3.2" between each pleat (space).
 
Space size = 3.2"
 
Pleat size = 5.5"
 
What is the finished width of your drapery panel (after pleating)? ______ (FW)
What is the finished length of your drapery panel ________ (FL)
 
Now you need to determine the # of spaces and pleats you will need.
 
# of spaces = FW / Space size
 
Example
Finished width of drapery panel will be 36”.
# of spaces = 36/3.2" = 11.25
Round this number up to the next whole number… 12 spaces (13 pleats)
 
Cut Fabric Length (CFL) = FL + 16”
 
Example
Finished length of drapery panel will be 72”.
CFL = 72” + 16” = 88”
Note: The 16” is for a 4” double bottom hem and 8” to allow for enough fabric at the top edge to achieve the desired effect when it’s time to sew the pleating tape.
 
Fabric width = __________ (typically 54”)
Horizontal pattern repeat = __________
Vertical pattern repeat = ___________
 
New Fabric Width (NFW) = Fabric width – Horizontal repeat
 
Example
The width of the fabric is 54” and it has a floral pattern that repeats horizontally every 6”.
NFW = 54” – 6” = 48”
 
If you have a solid fabric, then the horizontal repeat would be 0.
 
SP = Space size + Pleat size
 
O = amount of fabric you want on your leading edge before the pleat begins _________ (usually about 2" or 3")
 
R = amount of fabric you want on your outer edge before the pleat begins  _________ (usually about 2" or 3")
 
Cut Fabric Width (CFW) = ( # of spaces x SP) + Pleat size + O + R + 6” (side seams)
 
A = CFW/NFW
A is the number of fabric widths you will need to reach the required pieced width of fabric.
 
Example
O = 3”
R = 2.5”
# of spaces = 12
Pleat size = 5.5”
Space size = 3.2”
SP = 5.5 + 3.2 = 8.8”
NFW= 48”
CFW = (12 x 8.8” ) + 5.5 + 32.5 + 6" = 105.6 + 5.5 + 3 + 2.5 + 6”= 122.60”
 
This means when you have all of your fabric widths pieced together it should measure 122.6" wide.
 
A = 122.60”/48” = 2.55 fabric widths
You will need to piece together 2 and 1/2 fabric widths to reach 122.6"
 
B = A x (CFL + Vertical pattern repeat)
Fabric yards needed = B/36”
 
Example
A = 2.55
CFL = 88”
The fabric has a floral pattern that repeats every 6” vertically.
B = 2.55 x (88” + 6”) = 239.70”
 
Fabric yards needed = 239.70/36” = 6.66 yards
And round up. It is always best to have too much fabric instead of not enough.
 
The example says 6.66 yards, so you should buy at least 7 yards. You can make pillows with the left over fabric. Purchase the same amount of lining.


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