Acrylic foam backing - This fabric liner can also add insulation to your home.
Alcove - A small recess opening off of a larger room.
Allowance - The variation from the exact measurement taken to allow for slight adjustments.
Antique satin - A weave that uses slubbed or unevenly spun yarns.
Apron - Wood trim beneath the windowsill.
Ascot valance - A triangular top treatment generally used between matching panels.
Batiste - A lightweight, semi-sheer fabric usually made of cotton or cotton blends.
Battenburg - A coarsely cut, antique-style lace commonly used in kitchen curtains.
Bay window - The combination of three or more windows that project outwards to form an alcove.
Blister silk - A silk fabric with a textured finish.
Blouson valance - A valance that can be stuffed for a full look or hung as is for tailored style.
Bow window - A curved bay window which forms an alcove.
Box pleat - A flat double pleat made by folding under the fabric on either side of it.
Bracket - A piece of hardware attached to the wall or window frame to support window treatment hardware.
Brocade - A thick, heavy fabric embellished with a raised or interwoven pattern.
Buckram - A stiffened plain-weave fabric, usually made from cotton or linen, which is used to shape treatments.
Café curtain - A style of treatment that only covers the bottom half of a window. Also known as tiers.
Carriers - Small plastic pieces on a traverse rod that hold the pin hooks and slide along the cord.
Cascade - A vertical spilling or waterfall of fabric. Also known as a jabot or tail.
Casement window - A window that can be opened outwards on a hinge, typically with a metal crank.
Casing/Frame - The wooden frame around the whole window.
Center draw - Treatments that open and close from the center.
Center overlap - The part of a pinch-pleated panel that overlaps in the center when the draperies are closed.
Center support - A hardware piece that is designed to support a rod or pole at the center and prevent sagging.
Clearance - The measurement from the back rod to the wall.
Combination rod - Used mainly in layered window treatments, this rod can perform multiple functions, minimizing holes in your wall.
Continental rod - A rod which will fit through top loops or pockets in your treatments.
Cornice - Decorative treatment at the top of a window usually made of wood.
Curtains - A window treatment shirred or gathered on a rod, which can provide full or partial coverage. Curtains tend to evoke a more casual look.
Draperies - Window treatments that can be stationary, or drawn open and closed. Draperies can provide full or partial coverage, tend to be pleated and usually add a formal look to your décor.
Drapery hooks - Pinning hooks used to hang draperies on carriers or rings.
Festoon - A fabric draped between two points at the top of a window.
Finial - Decorative end pieces for a rod.
Flat-fold - A type of Roman shade with no folds or pleats when closed.
French pleat - Casual three-fold pleat used commonly in treatments.
Galloon - A décorative woven trim, sometimes in the form of a braid.
Gimp - Narrow décorative trim.
Hardware - Used to hold window treatments in place. They include metal and wood rods and décorative hardware, like sconces and finials.
Header - The portion above the rod pocket in draperies and curtains.
Holdback - Similar to tiebacks, holdbacks are used to keep drapes open, but are mounted to the wall instead of attaching directly to the treatment.
Inside mount - A window covering designed to be mounted inside the window frame.
Jabot - A vertical cascade at each side of a festoon or swag valance.
Jamb - Interior sides of a window frame or molding.
Light/grid - Horizontal wood or metal sections that separate panes of glass in windows.
Lining - Material attached to the back of the window treatment for added weight and insulation.
One-way draw - Draperies or traverse rods that open and close to one side.
Outside mount - A window covering designed to be mounted outside the window frame.
Overlap - The part of a pinch-pleated panel which overlaps in the center when closed.
Pair - Two panels of draperies or curtains which are sold together.
Panel - One half of a pair of draperies or curtains. These are usually sold separately, unless otherwise noted.
Pinch pleats - A drapery heading where the basic pleat is divided into a few smaller pleats, sewn together at the bottom edge on the right side of the fabric.
Pleated classic - A type of Roman shade with a contemporary, yet structured pleating.
Pole top - Draperies which are shirred on a rod. These usually include tiebacks.
Puddle - Allowing excess fabric from a panel or scarf to fall and pool elegantly on the floor.
Ready-made draperies - Ready-to-purchase draperies made to fit common window measurements.
Recess - The depth of a window opening. This is usually used when measuring for inside-mounted treatments.
Relaxed - A type of Roman shade with a softer look. This shade features gathered fabric and curved sides when raised.
Return - The distance from the face of the rod to the wall or casing where the bracket is attached.
Rod pocket - The opening or sleeve through which a drapery rod is inserted.
Roll-up shade - A type of window shade that is raised and lowered by a string control.
Roman shade - A flat-faced fabric shade that folds into neat horizontal pleats when it is raised.
Sash rod - A small piece mounted on a window frame to secure sashes or tiebacks.
Scarf - A long piece of lightweight fabric that can be draped or wrapped on a rod or pole.
Sconce - A piece of décorative hardware that is wall-mounted to hold fabric or a scarf.
Shades - An adjustable window covering that shields natural light with complete control.
Sheers - A transparent window treatment.
Shell - The outer covering of a treatment, as opposed to the lining or insulation.
Shutters - A window treatment consisting of wooden hinged or solid panels.
Sill - A horizontal piece of wood or plastic that serves as the base of a window.
Side hem - The folded and finished edge along the sides of a curtain panel.
Stackback - The amount of space a treatment occupies when it is drawn open.
Swag - A piece of fabric that is folded and draped to hang in a semicircle at the top of a window.
Tab-top curtains - A panel or valance with loops sewn to the top, which can be hung from a rod or pole.
Thermal backing - This backing lends extra insulation for windows where outside temperatures, noise and drafts are more noticeable. In the case that your treatment features an acrylic-foam backing, additional linings are not necessary.
Tiebacks - Fabric strips that hold drapery panels or curtains open.
Tier - A style of treatment that only covers the bottom half of a window. Also known as café curtains.
Top treatment - A décorative window treatment that is used to cover hardware from an undertreatment.
Traverse - This treatment opens and closes across a window with the use of a traverse rod.
Traverse rod - A horizontal bar that holds pins and hooks, enabling treatments to slide open or closed with a cord.
Undertreatment - This treatment layers under the top drapery or curtain. These may include blinds, shades or sheers.
Valance - A horizontal, décorative treatment that can be used to hide hardware or complement draperies or curtains.
Venetian blind - A window blind installed on a track on the top of a window so they can be opened or closed with a cord.
Vertical blind - A window covering installed on a track on top of a window so they can be opened or closed like draperies.
Waterfall - A type of Roman shade with cascading, soft folds.