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Glossary of Terms

Your complete guide to window and door industry terminology



Do you know your mullions from your main frames? Check out our helpful guide to the terms and phrases commonly used in the building and plastics industry.

 

AAMA AAMA Gold AAMA Silver
Acrylic Active Aerogel
Air infiltration Air Leakage (AL) Airspacer
Annealed glass Annealed PVC ANSI
Arch-top Argon ASHRAE
ASTM International Astragal Awning
Backband Backbedding Balance
Basic Bay BETEC
Bi-hinge BOCA Boot glazed
Bottom rail Bow Box bay
Breather tube Brickmould Caming
Casement Casing Caulking
Cellular PVC Cellulosic composite Celuka PVC
Check rail Circle-top Cladding
Clear IG Clerestory Combination door
Composite Condensation Condensation Resistance (CR)
Corner cleaner Cottage double-hung CRF
CRM Dade County Daylight opening
Desiccant Design pressure (DP) Direct glaze
Direct set Divided lites Dormer
Double glazing Double hung Double-strength glass
Drip cap Dual Low-E Edge effect
Egress window Electrochromic glazing Elliptical
Energy Star® ERP EuroWmdoor
Extended quarter Extension jamb Extruded aluminum
Extrusion Fanlight Fenestration
Finger-joint Fixed lite Fixed panel
Flashing Float glass Flush door
Fogging Frame size French door
French slider Full Round Fusion-weld
Glass size Glazing Glazing stop
Glider Gothic Grille
Half round Hallmark Handing and Hinging
Hard-coat glass Head Header
Heat gain Heat loss Hollow-core door
Hopper Horizontal slider IBC
ICBO IECC Inactive
Inner bar (simulated spacer channel) Inner grille In-sash
Insulating glass (IG) Inswing IRC
Jalousie Jamb Jamb depth
Jambliner J-channel KD (Knocked down)
Laminated glass Lineal Lintel
Lite Lite cut Low-emissivity (LoE) glass
Marine glazed Masonry clip Masonry opening
MDF MEC Mechanical window
Mullion Multipoint lock Muntin
Nailing fin NFRC NWWDA
One-step distributor Oriel Outswing
Palladian Panel Panning
Parting stop Perimeter grille Picture window
Pivot window Plate glass Polycarbonate
Polyvinyl Butyral (PVB) Pre-hanger Primary active panel
Primed window Prime window Projected window
Pultrusion PVC Pyrolytic glass
Quarter round Radiation Rail
Reflective glass RESFEN RF
Rolled form aluminum Roofwindow Rough opening
Round top Round-top picture R-value
Safety glass Sash Sash cord
Sash lift Sash Size or Sash Opening Sash weights
SBCCI Secondary active panel Segment top picture
Segment top quarter Self-cleaning glass Sequential locking system
Set Up vs Basic Shading coefficient (SC) Sheet glass
Sidelites Sill Sill nosing
Simulated divided lite (SDLs) Single glazing Single hung
Single-strength glass Skin Slab
Smart window Soft-coat glass Solar control glass
Solar heat gain coefficient (SHGC) Solid-core door Sound transmission class (STC)
Spectrally-selective glass Spread mull Sputter-coating
Stat Stick grille Stile
Stile-and-rail door Stop Stop glazed
Stud pocket Sub sill Super window
Swing door Tempered glass Tenon
Thermal break Tilt window Tints
Transom Triple glazing True divided lites (TDLs)
Tubular/Hollow PVC Two-step distributor U-factor
Ultraviolet light (UV) Unit size Vinyl
Visible Transmittance (VT) Warm-edge WDMA
Weatherstripping Weep hole Weld
Wet glazed Wildland/urban interface Windload