This tutorial is based on using one width of fabric or lining to make a blind. Lining is usually approx 137cm wide, so most blinds less than 137cm wide will only need one width of lining (check your lining width).
The lining panel is cut to the following size to make the blind:
If you are using rod pocket tape RPA=0, please see ROD POCKET TAPE notes below.
LINING QUANTITY REQUIRED
The minimum amount of lining required to make a single width roman blind is LINING CUT DROP + TRIMMING ALLOWANCE.
PRO TIP: Add at least an extra 6cm trimming allowance to the cut drop to ensure that the lining can be cut square during the making process.
The Interlining panel is cut to following size to make the blind:
INTERLINING QUANTITY REQUIRED
The minimum amount of Interlining required to make a single width roman blind is INTERLINING CUT DROP + TRIMMING ALLOWANCE.
PRO TIP: Add at least an extra 6cm trimming allowance to the cut drop to ensure that the interlining can be cut square during the making process.
To help check your results and make the process easier or if you don't like maths we've made this calculator for calculating Roman blind fabric and lining quanities.
EXTRA INSTRUCTIONS
Extract from our ROD POCKET TAPE EXTRA Tutorial
If you are using Rod Pocket Tape you will need to disregard the rod pocket allowance as you will not be making the rod pockets out of the lining. Therefore the ROD POCKET ALLOWANCE (RPA) = 0 when calculating the LINING CUT DROP.