This group of questions spans a variety of interests:
How do I make a rolled hem? The easiest way to make a rolled hem is to stitch it on the serger, using the rolled hem setting. The stitch created is a dense, tightly packed one that actually rolls under a narrow fabric edge as it stitches due to tension adjustments. Since each serger is different, consult your machine instruction book for your particular settings.
To make a rolled hem by hand, run a line of stitching 1/8″ from the edge of your project, then turn under the fabric edge along that line of stitching and hand sew in place. This method creates a narrow, double hem perfect for edging napkins, scarves and other projects. It’s best not to press the edge unless you like that look, but instead leave a soft roll.
What’s the best way to line a pair of pants? If the pattern calls for lining, chances are there are separate pattern pieces included for the style. If not, use the same front and back pieces as the outside pant, but construct them separately from lining fabric. Before adding the waistband, place the lining inside the pant wrong sides together. Adding the waistband will hold them together, then hand tack the area around the zipper, trimming the lining as needed. Hem the pant and lining separately, but add a French tack at the lower leg seams to keep the lining in place.
How should I handle home decorating fabric–does it need to be prewashed? It’s pretty much impossible to preshrink home decorating fabric by prewashing it simply because of the quantity involved. Most home decor projects aren’t washed for general care. If you’re making something like a child’s pillow, pet bed cover or something that will be washed later, do prewash the fabric if possible. Many home dec fabrics are treated with finishes of some sort (stain resistance, etc.) and washing may rid the fabric of those protections, so check the bolt to note the manufacturer’s recommended care instructions.