Lesson 1
Thus he shewed me: and, behold, the Lord stood upon a wall made by a plumbline, with a plumbline in his hand.
Amos 7:7
Measuring the Window and Figuring the Yardage
Furnishing a house with your own hands begins long before the machine is threaded. It begins with a tape measure, a pencil, and a few minutes of honest arithmetic. Curtains that hang badly are almost never sewn badly; they are measured badly. The prophet Amos saw the Lord standing by a wall with a plumbline in His hand, holding the work to a true and unchanging standard. A steel tape and a level are your plumbline, and it costs nothing to trust them instead of your eye.
Measure the Hardware, Not the Glass
Curtains hang from a rod, so the rod is what you measure. Mount the hardware first. A rod set three to six inches above the window casing, and extending six to ten inches past the casing on each side, lets the panels stack off the glass when they are open and makes the window look taller and wider than it is. Once it is up, measure the rod itself from bracket to bracket for width.
For length, hook the tape on the bottom of the rod, or on the eye of a ring if you are using rings, and measure down to where you want the hem to stop. Three common stopping places: a half inch above the sill, four inches below the apron, or a half inch above the floor. Take that measurement at the left bracket, at the center, and at the right bracket. Old houses are rarely square, and if the three numbers differ by more than a quarter inch you will want to know that now rather than after cutting.
Fullness: How Much Cloth a Panel Needs
A flat panel the width of the window looks like a bedsheet nailed up. Gathered curtains need fullness, and fullness is a multiplier on the rod width. Two times the rod width is the usual working minimum for a rod-pocket curtain; two and a half times looks generous; three times is full and heavy and eats fabric fast. Lightweight sheers can carry three times easily because the cloth is thin. Heavy cotton duck at three times fullness will not fit on the rod.
Work it out plainly. A rod measuring 48 inches, at two and a half times fullness, wants 120 inches of gathered cloth. Add side hems: a one and a half inch double-fold hem folds away three inches at each side edge, so six inches per panel and twelve inches for a pair. If your fabric is 54 inches wide and you lose about an inch to trimming the selvages, each width gives roughly 53 inches. Two and a half widths give about 132 inches, and taking out the twelve inches of side hems leaves exactly 120 across the rod, hitting the target on the nose. But half widths mean an off-center seam running down each panel, so many sewers round up to three widths, accept the twelve inches of hems out of 159, and hang a panel pair of about 147 inches. That is closer to three times fullness than two and a half, and it costs one more cut length of fabric. Either choice is right, but make it on purpose and know which one you are buying.
Cut Length, Hems, and the Repeat
Cut length is finished length plus everything you fold away. For a plain rod-pocket panel, add the pocket and heading at the top and a deep hem at the bottom. A four-inch double-fold bottom hem needs eight inches of cloth. A rod pocket sized for a one-inch rod with a two-inch heading needs roughly seven inches folded under, plus a half inch turned for a clean edge. So a finished length of 84 inches wants a cut length near 99 or 100 inches.
Printed decorator fabric adds one more line to the arithmetic. A print with a 24-inch vertical repeat must be cut so the motif falls at the same height on every panel, which means every cut length after the first must be rounded up to the next full repeat. Buy one extra repeat per width beyond the first and you will not be short.
Where the Arithmetic Goes Wrong
The three failures repeat themselves in every sewing room. Measuring the window opening instead of the mounted rod gives panels that are too narrow and too long. Forgetting that fullness applies to the rod, not the glass, gives skimpy curtains. Adding the hem allowance to only one panel of a pair gives two curtains of different lengths, which no amount of pressing will fix.
Write every number down on paper before you cut, then read the list back once. Cloth cut short cannot be lengthened, and a careful ten minutes with a pencil has saved more yardage than any clever technique ever will.
Check yourself
What should the width measurement for curtain fullness be taken from?
- The width of the glass pane
- The width of the window casing only
- The mounted rod, measured bracket to bracket
- The width of the wall
Answer
C. The mounted rod, measured bracket to bracket
Why does the text recommend measuring the drop at the left, center, and right?
- Older houses are rarely square, and the numbers may differ
- To decide the fabric color
- Because rods stretch over time
- To calculate the pattern repeat
Answer
A. Older houses are rarely square, and the numbers may differ
What is described as the usual working minimum fullness for a rod-pocket curtain?
- One and a quarter times the rod width
- Two times the rod width
- Four times the rod width
- Exactly the rod width
Answer
B. Two times the rod width
A four-inch double-fold bottom hem consumes how much cloth in the cut length?
- Four inches
- Six inches
- Two inches
- Eight inches
Answer
D. Eight inches
How is a rod usually positioned relative to the window casing?
- Flush with the top of the glass
- Three to six inches above the casing and extending past it on each side
- Below the casing
- Centered on the glass only
Answer
B. Three to six inches above the casing and extending past it on each side
On a printed fabric with a 24-inch vertical repeat, what must be done to cut lengths?
- Ignore the repeat and cut all panels the same
- Cut every panel on the bias
- Round each cut length up to the next full repeat so motifs match
- Cut panels shorter to save fabric
Answer
C. Round each cut length up to the next full repeat so motifs match
In the worked example, a 48-inch rod at two and a half times fullness calls for how much gathered cloth?
- 96 inches
- 120 inches
- 144 inches
- 72 inches
Answer
B. 120 inches
What does the plumbline in Amos 7:7 illustrate for the sewer?
- That decorating should be expensive
- That old walls should be torn down
- That measuring is optional for skilled workers
- Holding work to a true, unchanging standard rather than the eye
Answer
D. Holding work to a true, unchanging standard rather than the eye
Which mistake produces two curtain panels of different lengths?
- Using a steel tape instead of a cloth tape
- Mounting the rod too high
- Adding hem allowance to only one panel of the pair
- Choosing a solid fabric
Answer
C. Adding hem allowance to only one panel of the pair
Why does the text say curtains that hang badly are usually not sewn badly?
- The failure is almost always in the measuring
- Because thread quality is the real issue
- Because rods are usually defective
- Because gathering always fails
Answer
A. The failure is almost always in the measuring