|How much fabric?||
| The Encyclopaedia of Curtains, page 116/117
© Copyright Merrick & Day
|Check the measurements you will need before you begin
your calculations. A calculator is useful.
Do your calculations as given in the Almost Instant Fabric Formula
A graceful proportion is for the shortest and longest measurements to be 1/6 and 1/5 respectively of the finished curtain length. Calculate the fabric quantities as for a straight valance based on the longest measurement.
The finished depth of the valance at the shortest point should be 1/6 or 1/5 of the curtain length. The longest point at the sides is determined by the design. If the longest point hangs over the curtain stack back area, there will be no loss of light.
Cut drop = deepest measurement of valance + a heading and hem allowance. Adjust the cut drop for pattern repeats if necessary.
The finished width of a flat pelmet is the measurement around the pelmet board or rails including the sides. Divide this figure by the usable width of the fabric to establish the number of widths you will need.
Cut drop = deepest measurement of pelmet + 15cm (6in) turning allowance.
INFORMAL SCARF DRAPERY, SWAGS AND TAILS
For estimating quantities, see p166 and p182 respectively in The Encyclopaedia of Curtains.
For contrast edging, frills and fabric trims, see Individual instructions in Finishing Touches pp l50-65 in The Encyclopaedia of Curtains. These apparently minor quantities will add up to more yardage than you imagine; never assume you will be able to find enough from leftover fabric. For piping and binding cut on the cross, see pl21 in The Encyclopaedia of Curtains.
These are estimated in the same way as window curtains. For specific details, see p213 in The Encyclopaedia of Curtains.
For round tablecloths, see p218 in The Encyclopaedia of Curtains. Obviously there will be some wastage with round cloths, but you can use the corners for the smaller fabric trims, applique on cushions and so on.
BLINDS ROLLER and ROMAN BLINDS
Will need only the flat measurement across the window, see ppl99-200 in The Encyclopaedia of Curtains.
GATHERED AUSTRIAN BLINDS
Vary in fullness from 1.5 2.5 according to the heading required. They are usually made a little overlong so that you can have pretty scalloped hems even when they are dropped down.
As above, but they also have extra vertical fullness; for more details see pp203-4 in The Encyclopaedia of Curtains.