Insulated draperies hung on a western or northern window will

keep both the winter wind out and the summer sun in check.

Insulated draperies, unlike most panels you will find readymade in department stores have a layer of thermal insulating fabric called an interlining between the face fabric and the lining.
They work on the same principal as layering clothes in the winter.
In between each layer of fabric is an air pocket; this is what keeps the cold and heat out (or in).

You will get your biggest bang for your insulating buck when the draperies are pulled closed, and have returns (this is the end of the panel that goes from the rod back to the wall at a 90 degree angle).
A dust cap or cornice board should “seal” off the top part of the window so that, except for the bottom of the drapery, the window is surrounded by fabric or wood.

Don’t spend your money insulating fabric that will be used as decorative panels just flanking the window.
Instead, put more of your money into a better face fabric for these.

Many homes in Great Britain still use draperies interlined in bump to cover their exterior doors.
Bump is very thick cotton or cotton/polyester flannel fabric that makes the draperies as thick as a comforter and offers a similar insulation value.
It is truly a luxurious look that can only be found in custom draperies.

Insulated draperies can also help you out on your sliding door. They add a beauty that vertical blinds can't hold a candle to.

Here is how to install the drapery rod

Let’s leave the insulated draperies and head back home.