Although many people think they are synonyms or regional varieties (drapes-american english; curtains-british english), there is more to the difference between drapes and curtains. Believing them to be the same, there are actually some differences between the two that are important for those looking for purchasing new window treatments for their homes.
Drapes are generally considered to be made of heavy fabrics that are not made from sheer or see-through materials – these types of window treatments generally run floor-length and are made to block out light during the day and to seal in heat during cold or winter months. Drapes are usually more expensive than traditional curtains, as they contain more fabric than their window counterparts; although they are sometimes of a higher quality than curtains and can help homeowners save on their heating bills throughout the year.
Curtains are usually made out of lighter fabrics like cotton or sheer and translucent materials and are cheaper as they are less expensive to produce than heavy drapes. Curtains, unlike drapes, are not usually lined and so they provide less privacy when used alone but are light enough to be paired with blinds or shutters without making windows appear bulky.