The Historical Perspective
The golden age of curtain design was the nineteenth century. Any house which was considered respectable would have had over curtains, under curtains, shades and/or shutters, together with a valance or cornice box pelmet
An alternative way was to drape fabric on a substantial pole with heavy rings and ornate finials. Fringes and tie backs were also common, with many of the fringes quite elaborate
With the changes in taste, style, finance and window size a whole range of curtain design options is available to us today. The elaborate treatments as described above are still used for formal rooms in large houses. But curtains can still make all the difference to a room if they are carefully and tastefully installed
Linings and Interlinings
If you're using sheer or lightweight fabrics then you'll probably use the fabric on its own. Otherwise it is advisable to use a lining as part of your curtain design. They'll hang better, and also look better from outside. If you are using a thin fabric, or you just want your curtains to look fuller and richer, then use an interlining as well. This is a thick, fluffy lining which makes your curtains seem fuller and thicker, and also helps to insulate your room
How to choose your curtain design
?What sort of finish do you want
Simple or elaborate? Note that modern treatments tend to be simple (for example, single metal pole with integral track and plain curtains), while traditional ones can be more elaborate (heavy interlined curtains with fringe on the edges, with draped swags and tails).
Remember to choose a design which is keeping with your room style. So if you have a Victorian house, then you'll be safe if you base your window designs on Victorian ideas. Thick heavy poles were often used, or curtains with fabric draped along the top, such as drapes and side tails.
If your room is contemporary (such as minimalist) then a plain track can be used, or a metal pole (brushed steel or aluminum is common) with matching finials ends