Rugs and Carpets Industry Terminology

Abrash

Natural or intentional tonal variation within a rug’s color field, often from hand-dye differences or uneven dye uptake. Common in hand-made and ‘vintage’ looks; can be a design feature or a defect if unplanned.

Examples: “The vintage Oushak shows intentional abrash that adds character”; “We rejected the lot due to unplanned abrash across the field”; “Design wants controlled abrash to hide traffic lanes.”


Antimicrobial treatment

A chemical or additive finish that inhibits odor-causing microbes on the textile surface. Used in healthcare, hospitality, and damp environments; does not replace cleaning.

Examples: “Specify antimicrobial treatment for the healthcare wing”; “The yarn has a built-in antimicrobial additive”; “Confirm the efficacy data against odor-causing bacteria.”


ASTM E648 Radiant Panel

U.S. fire test measuring critical radiant flux of floor coverings under a heat source. Class I (≥0.45 W/cm²) is typically required for corridors and exits; Class II (≥0.22 W/cm²) for rooms.

Examples: “Corridors must meet Class I per ASTM E648”; “Submit E648 test reports with the submittal”; “Tile with cushion backing still passed E648.”


Axminster

A woven construction where individually colored yarns are inserted to form the pattern. Offers high design detail and durability; common in hospitality.

Examples: “Axminster is ideal for custom patterned hotel corridors”; “Higher pattern clarity than Wilton for multicolor motifs”; “Lead time is longer due to loom setup.”


Backing system (primary/secondary/unitary)

The structure behind the face yarns. Primary backing holds tufts; secondary adds stability (often latex + woven polypropylene). Unitary backing integrates coating without a separate fabric.

Examples: “Primary is woven PP; secondary is action back with SBR precoat”; “Switching to unitary backing improves tuft bind”; “Check dimensional stability specs for the backing system.”


Berber (loop style)

In contemporary usage, a loop-pile style (often flecked). Historically refers to hand-woven North African textiles; in modern trade it denotes loop textures, typically with natural tweed effects.

Examples: “Residential ‘berber’ refers to flecked loop pile”; “Avoid calling a patterned loop ‘Berber’ in specs unless defined”; “Loop berber can show snagging with pets.”


Carpet tile (modular)

Modular carpet units (squares or planks) installed with adhesives or tabs. Benefits include design flexibility, replaceability, and reduced waste.

Examples: “Use 50 cm tiles with quarter-turn layout”; “Planks allow herringbone installation”; “Tiles ease access to raised floors.”


Continuous dyeing

Open-width, high-throughput dye application to carpet goods or yarn on a continuous line, enabling large, consistent dye lots and efficient production.

Examples: “Continuous dyeing lowers per-yard cost for large runs”; “Shade control is tighter on the continuous range”; “We can’t do that custom color on the range—too small of a lot.”


CRI Green Label Plus

Carpet and adhesive VOC emissions certification from the Carpet and Rug Institute, recognized by LEED and other programs for indoor air quality.

Examples: “GLP certificate required for LEED Low-Emitting Materials”; “Tile backing and adhesive both need GLP compliance”; “Check the product’s CRI ID number.”


Cushion (carpet cushion/pad)

Underlayment used with broadloom to add comfort, acoustics, and longevity. Types include rebond urethane, rubber, and fiber felt; densities and thickness vary by application.

Examples: “Use 8-lb rebond cushion for residential”; “Double-stick requires dense rubber cushion”; “Cushion improves IIC and comfort.”


Cut and loop

A pile construction mixing cut and loop tufts to create texture or pattern. Balances durability with visual interest.

Examples: “Cut/loop adds sculpted pattern without printing”; “Cut/loop in offices hides soil well”; “Mind the seam visibility on directional cut/loop styles.”


Cut pile

Pile whose loops are sheared to create upright tufts. Common varieties include saxony, velvet, and frieze; feel and appearance depend on yarn, twist, and shearing.

Examples: “Saxony is a type of cut pile”; “Cut pile shows shading more readily”; “Choose tighter twist cut pile for better performance.”


Density (carpet)

The closeness of tufts in the pile, reflecting how much yarn is packed into a given area. Higher density generally means better resilience and wear.

Examples: “Higher density improves texture retention”; “Face weight is decent, but density is low”; “We’ll increase stitch rate to boost density.”


DOC FF 1-70

U.S. flammability standard (pill test) for carpets and rugs required by the Consumer Product Safety Commission to reduce surface flammability hazards.

Examples: “Area rugs must pass the DOC pill test”; “Importers need FF 1-70 compliance labels”; “Small rugs failed due to surface flash.”


Double-stick installation

Method where cushion is glued to the substrate and broadloom is glued to the cushion, combining stability with cushioning in commercial installs.

Examples: “Use double-stick in ballrooms for comfort and stability”; “Adhere cushion to slab, then carpet to cushion”; “Specify compatible adhesives for both bonds.”


EPD (Environmental Product Declaration)

Standardized, third-party verified life-cycle footprint document (per ISO/EN standards) disclosing environmental impacts of a product.

Examples: “Submit third-party verified EPD for LEED MR credits”; “We have a product-specific EPD for our tile”; “EPD shows the global warming potential per m².”


Encapsulation cleaning

Low-moisture carpet maintenance method where polymers encapsulate soil for later vacuum removal. Good for interim cleaning to maintain appearance.

Examples: “Use encapsulation for interim maintenance”; “Encap reduces downtime in open offices”; “Follow with periodic hot water extraction.”


Face weight

The weight of the fiber pile (excluding backing), typically in ounces per square yard. Higher face weight can indicate more yarn, but must be considered with density and construction.

Examples: “Spec calls for 28 oz/yd² face weight”; “Don’t compare face weight across different pile heights without density”; “Tiles list face weight in oz/yd² too.”


Gauge (tufting)

The spacing between tufting needles (e.g., 1/10 inch). Along with stitch rate and pile height, gauge influences density and appearance.

Examples: “A 1/10-gauge yields finer rows”; “We’re shifting to 1/8 gauge for higher density”; “Gauge and stitch rate drive pattern clarity.”


Glue-down installation

Carpet or tiles adhered directly to the substrate using wet-set, pressure-sensitive, or releasable adhesives. Provides dimensional stability and durability.

Examples: “Direct glue is standard in high-traffic corridors”; “Moisture-tolerant adhesive is required”; “PSA allows future tile replacement.”


Hand-knotted

Rugs made by tying individual knots to warps on a loom. Durability and detail correlate with knot density (KPSI); labor-intensive and premium.

Examples: “This 150 KPSI hand-knotted rug is heirloom quality”; “Lead times are long for custom hand-knots”; “Expect natural abrash and slight irregularities.”


Hand-tufted

Rugs produced by punching yarn through a fabric using a tufting gun, then latex-coated and sheared. Faster than hand-knotting; wide design flexibility.

Examples: “Hand-tufted wool with latex backing”; “Great for custom shapes at mid-tier budgets”; “Expect initial shedding with hand-tufted rugs.”


Heatset yarn

Thermally setting yarn (often BCF) to lock in twist and bulk, improving resilience, appearance retention, and reduced shedding.

Examples: “Heatset frieze resists untwisting”; “Heatsetting reduces blooming and fuzzing”; “Needed for BCF nylon twist retention.”


Hot water extraction

Deep-cleaning method using heated solution injection and vacuum extraction. Often required periodically to maintain warranties and appearance.

Examples: “Schedule HWE annually per warranty”; “Pre-vacuum before extraction”; “Use low-moisture methods between HWE cycles.”


Landed cost

Total cost to bring goods to the buyer’s facility, including product, freight, insurance, duties, taxes, and handling.

Examples: “Quote includes landed cost to our DC”; “Ocean freight doubled our landed cost”; “Factor duties and port fees in the margin.”


Lead time

Elapsed time from order placement to delivery (and sometimes installation). Affected by capacity, customization, logistics, and approvals.

Examples: “Custom Axminster lead time is 10–14 weeks”; “Dye lot lead time slipped due to yarn backlog”; “Build extra time for shipping and installation.”


LEED v4.1

U.S. Green Building Council rating system version recognizing low-emitting materials, product transparency (EPD/HPD), and other sustainability attributes.

Examples: “Carpet qualifies for Low-Emitting Materials credit”; “EPD and HPD support LEED MR credits”; “Include adhesives under LEED VOC requirements.”


Loop pile

Pile made of uncut loops. Durable, textured, and good at hiding soil; can be level loop or multi-level.

Examples: “Level loop hides footprints”; “Berber loop needs snag precautions”; “Loop tiles hold up in corporate corridors.”


MOQ (Minimum Order Quantity)

Smallest quantity a supplier will produce or sell per color, style, or order, driven by production economics.

Examples: “The mill’s MOQ is 300 SY per color”; “MOQ applies to custom dye lots”; “We can waive MOQ with a surcharge.”


Nylon 6,6

High-performance polyamide fiber prized for resilience, heat resistance, and durability in commercial carpets. Often specified for heavy traffic.

Examples: “Choose 6,6 for better texture retention”; “6 vs 6,6 cost delta is 8%”; “Solution-dyed 6,6 passes stringent bleach testing.”


Pattern repeat/match

The distance before a pattern repeats in length and width, dictating seaming, layout, and waste calculations.

Examples: “Pattern repeat is 36" x 36"—plan extra waste”; “Ensure correct pattern match at seams”; “Tile quarter-turn avoids visual repeats.”


PFAS-free stain treatment

Soil/stain repellency finishes formulated without per- and polyfluoroalkyl substances, addressing health and regulatory concerns.

Examples: “Specify PFAS-free chemistry due to regulations”; “Marketing wants ‘fluorine-free’ claims”; “Test stain repellency without PFAS.”


Piece dyeing (Beck)

Batch dyeing of carpet goods in a dye beck after construction, suitable for smaller lots and deeper shades; shade variation must be managed.

Examples: “We’ll beck dye the greige for small custom runs”; “Beck dye lots vary—request shade bands”; “Lead time fits a beck process.”


Pile height

Measured length of the pile from the backing to the tip. Influences feel, appearance, and performance.

Examples: “Target 8 mm pile height for clearance under doors”; “Higher pile can crush in traffic lanes”; “Don’t compare pile height without density.”


Polyester (PET)

Common synthetic fiber with good stain resistance and value; softer hand but typically less resilient than nylon in heavy commercial use.

Examples: “PET offers good inherent stain resistance”; “High-denier PET can crush in heavy traffic”; “Contains post-consumer bottle content.”


Polypropylene (Olefin)

Hydrophobic, lightweight fiber with excellent moisture and chemical resistance; lower heat resistance and resilience than nylon.

Examples: “Olefin resists moisture and mildew”; “Low melt point—avoid rolling loads”; “Great for indoor/outdoor flatweaves.”


Rug pad

Underlay for area rugs that adds grip, cushioning, and floor protection. Materials include felt, rubber, or combined constructions.

Examples: “Use felt/rubber pad to prevent slipping”; “Pad protects wood floors from abrasion”; “Specify the right pad for radiant heat.”


Saxony

A smooth, uniform cut-pile style with upright tufts and a plush appearance; shows tracking more than textured styles.

Examples: “Plush saxony shows shading and footprints”; “Preferred for formal residential spaces”; “Tighter twist improves performance.”


Seam sealer

Adhesive applied to carpet edges at seams to prevent raveling and protect tuft bind and backing integrity.

Examples: “Apply seam sealer to all cut edges”; “Prevent ravel and delamination at seams”; “Use manufacturer-approved sealer with PVC-backed tiles.”


Solution-dyed

Colorant is added to the polymer before fiber extrusion, locking in color for superior lightfastness, bleach resistance, and color consistency.

Examples: “Color is in the polymer—excellent fade resistance”; “Ideal for bleach-cleanable specs”; “SDN reduces dye lot issues.”


Stitch rate (tufts per inch)

Number of stitches per inch lengthwise in tufted carpet. Together with gauge and pile height, it determines density and appearance.

Examples: “Raise stitch rate to boost density”; “1/10 gauge at 10 TPI improves cover”; “Pattern definition depends on TPI.”


Stretch-in installation

Broadloom installed over cushion and tensioned onto tack strips. Common in residential; offers comfort and easy replacement.

Examples: “Residential bedrooms are stretch-in over cushion”; “Use tack strip around perimeters”; “Temperature and RH affect stretch.”


TCO (Total Cost of Ownership)

All-in lifetime cost, including purchase, installation, maintenance, repairs, downtime, and disposal.

Examples: “TCO favors tiles due to selective replacement”; “Include maintenance and downtime in TCO”; “Lower initial cost isn’t always lower TCO.”


Triexta (PTT)

Polytrimethylene terephthalate fiber with excellent inherent stain resistance, soft hand, and good resilience—used in residential and light commercial.

Examples: “Triexta offers soft hand with strong stain resistance”; “SD triexta performs well in family rooms”; “Pricing sits between PET and nylon.”


Tuft bind

The force required to pull a tuft from the backing. Higher tuft bind indicates better resistance to pull-out and raveling.

Examples: “Spec minimum tuft bind of 10 lbf”; “Low tuft bind risks zippering”; “Backing change improved tuft bind.”


Tufting

Manufacturing process that inserts yarn into a primary backing with a needle bar to form pile, followed by coating to lock tufts.

Examples: “Most broadloom is tufted, not woven”; “Gauge and TPI are tufting parameters”; “Graphics tufting achieves pattern without printing.”


VOC emissions

Volatile organic compounds released from products that affect indoor air quality. Managed via low-emitting materials criteria and certifications.

Examples: “Meet LEED Low-Emitting Materials limits”; “Provide CRI GLP certificates for carpet and adhesive”; “Allow off-gassing before occupancy.”


Wicking

Reappearance of stains as moisture pulls soils from backing or pad up into the pile during drying after cleaning or spills.

Examples: “Spot returned due to wicking”; “Use proper extraction and drying to prevent wicking”; “Encapsulation can reduce wick-back.”


Wilton

Woven construction where face yarns are interlaced with warp and weft (often with wires), enabling complex textures and durable patterns.

Examples: “Wilton offers robust texture and pattern”; “Great for tailored stripes in hospitality”; “Costs more than standard tufted.”


Wool

Natural protein fiber valued for resilience, luxurious hand, and flame resistance. Requires appropriate maintenance and pest protection in some markets.

Examples: “Natural, resilient, and inherently flame-resistant”; “Specify mothproofing for certain geographies”; “Wool-nylon blends balance cost and performance.”


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