Window Covering Industry Terminology
Actual Size (Finished Size)
The precise manufactured dimensions of a window covering, as delivered. Often slightly smaller than ordered size to allow for inside-mount clearance. Distinct from ‘opening size’ or ‘tip-to-tip’ measurements.
- “The actual size of the blind is 1/2 inch less than the ordered width for inside mount.”- “Be clear if you’re ordering by actual size or by opening size.”- “Our quote assumes finished sizes, not deductions.”
ANSI/WCMA A100.1
The U.S. cord safety standard for window coverings established by the Window Covering Manufacturers Association. Addresses hazardous cords, requiring compliant operating systems and safety devices.
- “This shade meets the current ANSI/WCMA A100.1 cord safety standard.”- “We must specify a cord tensioner for compliance with ANSI/WCMA.”- “The client wants all cordless to align with the 2018 update.”
Battery Wand
A cylindrical battery pack that powers low-voltage motorized shades or blinds, typically mounted behind the headrail or cassette.
- “The motor uses a remote battery wand mounted behind the headrail.”- “Specify a battery wand extension for easier replacement.”- “They upgraded to a larger capacity battery wand to extend runtime.”
Blackout
A fabric or system that significantly blocks transmitted light. True blackout often requires side channels, sill angle, and top closure to control gaps.
- “The client needs blackout in the bedrooms.”- “Use side channels to reduce light leaks on blackout rollers.”- “This fabric is room-darkening, not true blackout.”
Bottom Rail
The lower horizontal component of a blind or shade that provides weight, structure, and a finished edge.
- “The faux wood blind ships with a color-coordinated bottom rail.”- “Add hold-down brackets to secure the bottom rail on the door.”- “The hem bar acts as the bottom rail on rollers.”
Bracket (Installation Bracket)
Hardware used to mount the window covering to the wall, ceiling, or frame; comes in varieties such as inside-mount, outside-mount, end, and center-support brackets.
- “Use outside-mount brackets due to shallow depth.”- “End brackets plus a center support for spans over 72 inches.”- “Fascia snaps onto the universal brackets.”
Cassette
A decorative headbox that houses the roller tube, fabric, and operating hardware, providing a finished appearance and light control at the top.
- “Specify a fabric-wrapped cassette for a cleaner look.”- “The cassette conceals the shade tube and hardware.”- “Choose square cassette to match the modern trim.”
Cellular Shade (Honeycomb)
A soft shade constructed of pleated, air-trapping cells that improve insulation, sound absorption, and light control; available in single, double, or triple cells.
- “Double-cell fabrics offer better insulation than single-cell.”- “Top-down/bottom-up is popular in cellular shades.”- “Use blackout cell for media rooms.”
Chain (Bead Chain)
A looped or endless operating chain (metal or plastic) used to drive a clutch for raising/lowering or tilting window coverings; must be tensioned for safety.
- “The clutch uses a nickel bead chain.”- “Install a tensioner to secure the looped chain.”- “Swap to plastic chain for coastal projects.”
Child Safety Tensioner
A device that anchors a continuous loop or cord to a fixed surface, eliminating hazardous cord slack and helping meet safety standards.
- “All continuous loops must include a compliant chain tensioner.”- “Mount the tensioner at the proper height to remove slack.”- “This device is required under ANSI/WCMA.”
Clutch
A geared mechanism on roller shades that converts chain motion into tube rotation for controlled raising and lowering.
- “Upgrade to a heavy-duty clutch for large rollers.”- “The Rollease-style clutch fits a #10 bead chain.”- “Clutch ratio affects lifting effort.”
Continuous Loop
An endless cord or chain that operates a clutch. Must be secured with a tensioner to meet child-safety standards.
- “The solar rollers are specified with a continuous loop.”- “Looped controls require a tension device.”- “Continuous loop offers precise control on large shades.”
Cordless Lift
A lift system with no free-hanging cords, typically spring-assisted for manual operation; reduces hazards and offers a clean look.
- “Bedrooms will be cordless per safety requirements.”- “Cordless lift has a spring assist; pull to raise or lower.”- “Max size is limited on cordless Roman shades.”
Cut-to-Size
A retail or fabrication service that trims stock window coverings to fit the opening, within allowable limits.
- “Big-box stores can cut the slats to size while you wait.”- “Factory cut-to-size reduces onsite trimming.”- “Be mindful of ladder spacing when cut-to-size.”
Day-Night Shade
A shade system featuring two fabrics—typically light-filtering and blackout—on the same headrail, allowing switching between modes.
- “Use a day-night cellular shade: light-filtering plus blackout.”- “The middle rail switches between the two fabrics.”- “Day-night is great for multi-function rooms.”
Dealer Cost
The wholesale price paid by authorized dealers to manufacturers or distributors; basis for margin calculations and pricing.
- “Your dealer cost is 45% off MSRP.”- “We’ll protect margins by adhering to MAP above dealer cost.”- “The rebate applies to dealer cost, not list price.”
Deduction (Fabrication Deduction)
The amount subtracted from measured opening dimensions to ensure proper fit for inside-mount installations; varies by product and vendor.
- “Take a 3/8 inch width deduction for inside-mount rollers.”- “Factory standard deductions vary by product.”- “Confirm whether deductions are already applied to the order.”
Drapery Hardware
The track, rod, brackets, carriers, rings, finials, and related components used to mount and operate draperies.
- “Ripplefold requires compatible carriers and tracks.”- “Specify returns and projection on the drapery rod.”- “Upgrade to decorative finials and rings.”
Fascia
A metal or fabric-wrapped cover that conceals roller hardware at the top of the opening; can include returns for outside-mount applications.
- “Use 4-inch fascia to cover the shade tube.”- “Anodized fascia matches the storefront mullions.”- “Specify outside returns for outside mount.”
Flame-Retardant (FR) Rating
Indicates a material’s ability to resist burning. Many commercial projects require FR fabrics that pass specific tests (e.g., NFPA 701).
- “The fabric is FR and passes NFPA 701.”- “Hospital specs require FR-certified shades.”- “Verify whether it’s inherently FR or topically treated.”
FOB (Free on Board)
A shipping term defining when ownership, risk, and freight responsibility transfer from seller to buyer; commonly specified as FOB origin or FOB destination.
- “Pricing is FOB factory; freight billed separately.”- “FOB destination includes delivery to site.”- “Confirm FOB terms before bidding.”
Grommet
A metal or plastic ring set into fabric or material to create a reinforced hole for mounting or decorative purposes (often used in drapery headers).
- “Grommet-top drapery installs directly on the rod.”- “Use stainless grommets for exterior applications.”- “Spacing affects drapery stack and fullness.”
Headrail
The upper structural component that contains the operating mechanisms of a blind or shade; attaches to mounting brackets.
- “Inside mount needs a headrail depth of 3 inches.”- “The headrail houses the tilter and lift components.”- “Choose a color-matched headrail.”
Hem Bar
A weighted bar at the bottom of a roller shade or panel that keeps the fabric taut and improves hang and stability.
- “The exposed hem bar is powder-coated black.”- “A sealed hem bar is inserted into the fabric pocket.”- “Heavier hem bars help reduce curl.”
Hold-Down Bracket
A small bracket that secures the bottom rail or hem bar to prevent movement due to wind or door operation.
- “Use hold-downs on the door to prevent sway.”- “Snap the bottom rail into the hold-downs.”- “Great for RV and door light applications.”
Inside Mount
An installation method where the product is mounted within the window frame or jambs, requiring adequate depth and accounting for deductions.
- “Inside mount requires 2-1/2 inches of minimum depth.”- “We’ll take standard deductions for an inside mount.”- “Inside mount offers a built-in look.”
Insulating Value (R-Value)
A measure of thermal resistance; higher R-values indicate better insulation. Cellular shades can materially improve window insulating performance.
- “Double-cell shades have higher R-values.”- “Add side channels to improve insulating value.”- “Bid notes: target R-value improvement of 20%.”
Lead Time
The time interval from order placement to shipment or installation readiness; varies by product complexity and capacity.
- “Standard lead time is 3–4 weeks from order to ship.”- “Motorized specials have extended lead times.”- “We need expedited lead time for the grand opening.”
Lift System
The mechanism that raises and lowers a shade or blind, including manual and motorized options; influences size limits and usability.
- “Choose between cordless, continuous loop, or motorized lifts.”- “The lift system must support a 10-foot drop.”- “Heavy fabrics need a higher torque lift.”
Light Gap
The space between the shade edge and frame where light can leak, especially on inside-mounted roller shades.
- “Expect a 1/2 inch light gap on each side of inside-mount rollers.”- “Use side channels to reduce light gaps.”- “Blackout still has perimeter gaps without channels.”
Louver
A slat in a blind or shutter that tilts to regulate light and privacy; available in various widths and materials.
- “3-1/2 inch louvers on vertical blinds.”- “Plantation shutters with 3-inch louvers.”- “Aluminum blinds use slats (louvers) to control light.”
MAP (Minimum Advertised Price)
A pricing policy that restricts the lowest price a reseller may publicly advertise for a product, distinct from actual selling price.
- “Dealers must not advertise below MAP.”- “MAP protects brand value and dealer margins.”- “The promo can’t violate MAP policy.”
Midrail
A horizontal rail within a shutter panel (or occasionally Roman shade) that divides louver sections for structural or aesthetic reasons.
- “Add a midrail at 30 inches to hide the lockset.”- “Tall shutters often require a midrail for stability.”- “Midrails break up louver spans.”
Minimum Depth
The least recess depth required to mount a product inside the frame, sometimes distinguished between secure mount and fully flush mount.
- “We need 3 inches of depth for a flush inside mount.”- “Insufficient depth means we’ll outside-mount.”- “Check minimum depth by product and cassette type.”
Motorization
Use of electric motors to operate window coverings, powered by battery, low-voltage, or line voltage; controllable via remotes, wall switches, apps, or automation systems.
- “Specify battery motors to avoid wiring.”- “Integrate shades with the building’s BACnet via gateway.”- “Set limits and groups during commissioning.”
MOQ (Minimum Order Quantity)
The smallest quantity a supplier will accept for an order, common for custom fabrics, special finishes, or private-label programs.
- “The custom fabric has an MOQ of 50 yards.”- “MOQ applies to colorway, not total fabric family.”- “We can combine POs to meet MOQ.”
NFPA 701
A standard fire test method for flame propagation of textiles and films used in drapery and shades, commonly required in commercial projects.
- “Provide NFPA 701 certificates with submittals.”- “The hotel requires drapery to pass NFPA 701.”- “Topically treated FR must still pass NFPA 701 after cleaning.”
Opacity
The degree to which a fabric blocks light. Typical categories include sheer, semi-sheer, light-filtering, room-darkening, and blackout.
- “Select sheer, light-filtering, or blackout opacity.”- “Client wants consistent opacity across the floor.”- “Opacity affects privacy both day and night.”
Openness Factor
In solar shade screens, the percentage of open area in the weave. Lower openness blocks more light and glare; higher openness retains more view-through.
- “Choose 1% openness for maximum glare control.”- “A 5% openness solar shade preserves views.”- “Openness affects SHGC and privacy.”
Outside Mount
An installation method where the product is mounted on the wall or trim outside the window frame, often used to maximize coverage or when depth is insufficient.
- “We’ll outside-mount due to shallow depth.”- “Outside mount reduces light gap with wider overlap.”- “Confirm projection and returns for OM valance.”
Pinch Pleat
A classic drapery header style where fabric is pleated and sewn at intervals, affecting fullness, stack, and drape.
- “Triple pinch pleat adds traditional fullness.”- “Order the rod with appropriate pleat hooks.”- “Stackback depends on pleat style and fullness.”
Plantation Shutter
An interior shutter with wide louvers (typically 2-1/2 to 4-1/2 inches) mounted in a stiles-and-rails frame; offers durable light and privacy control.
- “2-1/2 or 3-1/2 inch plantation louvers?”- “Composite plantation shutters for humid areas.”- “Hidden tilt bars modernize plantation shutters.”
Railroading
Orienting fabric so the width runs horizontally across the product, used to achieve wider shades or avoid seam lines.
- “Railroad the fabric to avoid a vertical seam.”- “Check if the pattern supports railroading.”- “Railroading maximizes shade width.”
Roman Shade
A fabric shade that raises into horizontal folds; available in flat, hobbled, relaxed, and other fold styles; can be corded, cordless, or motorized.
- “Flat Roman vs. hobbled Roman folds.”- “Add blackout lining to Roman shades in bedrooms.”- “Motorized Romans need weight in the bottom bar.”
Roller Shade
A shade where fabric wraps around a rotating tube; simple, durable, and scalable for residential and commercial applications.
- “Specify a 4-inch tube for the 10-foot drop.”- “Pair roller blackout with a separate solar.”- “Choose cassette or exposed fascia for rollers.”
RTS (Radio Technology Somfy)
A proprietary wireless protocol (433 MHz class) used by Somfy motorized window coverings for control via remotes, switches, and interfaces.
- “The motors communicate via RTS remotes.”- “Use a bridge to integrate RTS with the smart home.”- “RTS supports multi-channel grouping.”
SHGC (Solar Heat Gain Coefficient)
A measure (0 to 1) of how much solar radiation passes through a window assembly as heat. Shades and screens can help lower effective SHGC.
- “Lower SHGC reduces cooling loads.”- “Solar screens impact SHGC and glare.”- “Energy code compliance references SHGC.”
Side Channels
U-shaped tracks installed on the jambs that capture the shade hem bar edge to minimize light leakage, especially for blackout applications.
- “Blackout rollers with aluminum side channels.”- “Seal the headbox and add a sill angle to complement the channels.”- “Side channels cut stray light in labs.”
SKU
Stock Keeping Unit; a unique identifier for a specific product configuration used for ordering, inventory, and tracking.
- “Each fabric color has its own SKU.”- “Use the correct SKU for cordless lift.”- “The ERP shows the SKU on backorder.”
Valance
A decorative top treatment that conceals headrails or hardware; can be wood, metal, or fabric, with returns for outside-mount applications.
- “Crown valance with 3-1/2 inch returns.”- “Fabric-wrapped valance to match the shade.”- “Valances help conceal headrails on wood blinds.”
Related Topics
Was this page helpful? We'd love your feedback — please email us at feedback@dealstream.com.
