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Technical Information
Performance Standard


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A- Aluminum Cap Only

AA-Aluminum Cap & Nose

Active/Inactive Sidelite Seats- synthetic piece located on top of the sill supporting the sidelites

Active/Inactive Door Panel- referring to French Door and Hinged Patio Door Systems; it is the door adjacent to the main door in the system.  Inactive door is fixed while the active panel moves open and close.

ADA Compliant- American Disabilities Act; meets their standards

AI- Adjustable Inswing

Alumawood Astragal – a type of astragal made up of aluminum and wood components.

Astragal- An aluminum or wood (or combination of both) part that attaches to the fixed door panel.  It allows the fixed panel to attach to the top of the unit and into the sill when closed.  This can be unlatched to allow both panels to be opened at once.

Astragal Bolt – Portion inserted into the body of the astragal, slides up and down and locks into hole in the bottom of the unit.

AO- Adjustable Outswing



BB- Bright Brass (Gold) Aluminum Finish

Block Sill- A fixed sill using blocks instead of full substrate.

BR- Bronze Aluminum Finish

Brickmould - Wood molded pattern used to go around the exterior door frames.  This is often put on pre-hung units.

Bulk Pack - Packed material in bulk quantities on skids.

Bumper Outswing- Bumper Outswing Sills afford ultimate protection in high exposure areas and under severe weather conditions. The seal produced by the Bumper Outswing increases with pressure against the door, creating a tough seal against air and water infiltration.



Cap/Riser- The portion of the seal that seals against the door bottom of an inswing unit.  Provides and gives overall height of the sill.

Carton Pack- To pack all material for a door unit complete in a carton which includes all components.  Mainly used for wood components.

Casing- The trim around the door that covers the jamb edges

Caulk- Sealant which is usually extruded into a joint to seal against air and water infiltration through the joint.

Center mull- Profiled, stationary piece of wood that goes into the center of a patio or CSL door.

Continuous Headers- Continuous, one piece headers provide strength to the entire door

Continuous Sills- A single sill that spans the door unit and sidelight to be stronger and have better appearance than 2 or 3 separate pieces.

Corner Pad- Offers resilience, durability, and consistent compression, for lasting performance; provides seal in the bottom corner of both sides of the unit.  This is referred to as the “Critical Corner.”

CSL unit- Continuous sidelite- 1 piece header and sill with center mulls; Double-2 fixed panels Single- single sidelight on one side or the other



Dado- A machined groove across the width of a part.

Dam- Acts as a barrier to air driven water, there are High Dam and Low Dam

DSR – Double Screen Rail

Door Bottom –a plastic, wood, or aluminum part that is applied to the bottom of a door panel to allow the panel to seal against the sill of a door unit.  Also called a “sweep.”

Door Frame Alignment Bracket – a small metal part that can be applied to a door unit to help prevent racking of the unit during shipment.

Door Jamb – Wood frame that goes around the door to secure it in place





FEN – Full Exposed Nosing

FI- Fixed Inswing

FIB- Fixed Inswing Bumper

Field packs – small bags that are shipped with Astragals and Pre-Finished Frame Heads that contain components intended to be applied to the product and/or door unit in the field.  Packs can include cap plugs, screws, and installation instructions.

Finger jointed- Joining two pieces of wood together to make one long piece.  This profile is similar to your fingers and can interlock into one another.

Fixed Block- Adjustable fixed Outswing

FJ- Finger Joint Cap

Flush Bolt- a unique locking mechanism that does not allow French doors to be forced open; injection-molded piece built into the astragal.

Floating Boot- located on the bottom of the Ultimate astragal, it lifts with the flush bolt and allows the door bottom to clear the threshold.

FOB- Fixed Outswing Bumper Sill

FO-Fixed Outswing (All Aluminum

French Door System- header, screen, channels, astragal, sill, double screen rails





HAI- High Dam Adjustable Inswing

Handing- A term which describes or determines the direction of swing of a door when opening

Haunch- type of cut into the mull that allows it to fit into the sill

HD- High Dam

Hinge Jamb- hinge side of the doorjamb

Header- solid piece of wood located across the top of the doorframe

HFIB-Dam Fixed Inswing Bumper Sill

HFI-High Dam Fixed Inswing

HFO- High Dam Fixed Outswing (All Aluminum)

Hinged Patio Door System- continuous header, one piece mulls, continuous sill, inactive panel with cap

HP- High Profile



Inactive Sidelight Seats- On the outside of doors that usually have windows

Inactive Caps- Used for a fixed door, i.e. glass panel

Inswing- Door that opens into the house when the hinged door panel is open





Kerf- cut in the jamb where weatherstrip in installed.  Interior doors do not have a kerf.



Length terminology – most lengths are vocalized in door openings sizes.  Example 3/0 is 3 foot 0 inches; 2/8 is 2 foot 8 inches.

Lineal – raw metal or assembled sill, reaching lengths up to 154”

LP- Low Profile



ML- Mill Finish

Mull Boot- attaches to the mull replacing the need for a haunch cut for use in the Z-Series 

Mull Packs- Superior design, durability and reliable performance-CSL units and Mull Packs are precisely machined, and built to your specifications.  Tight manufacturing tolerances, continuous full-length sills, noninvasive machining, and specially designed sidelight caps make our products superior.

Mull Pads- transitional piece to form a seal between the mull and the sill



Nosing- Located on the backside of the sill; usually has rounded face or corner



O- Oak Cap & Nose

Oak Adjustable- North American Oak thresholds, noncorroding adjustment mechanisms and the innovative bulb seal add p to a proven product that will enhance the craftsmanship of a beautiful door. 

One Piece Mulls- A center mullion that eliminate BTB jambs and is sturdier

Outswing and Fixed Inswing- Outswing sill are perfect for low exposure applications such as utility doors and well protected breeze way entrances.  Outswing doors provide the ultimate in security and protection.

Outswing- Door that opens out of the house when the hinged door panel is open



Patio- Single Mull- 1 inactive /1 active panels

Patio unit- 2 or more doors

Primed- Primer applied as a base before painting

PVC- Plastic material used to make molded or extruded parts; stands for polyvinyl chloride





Rab – (aka Rabbet) Thin side of a door jamb that the door fits into when closed.

Rough Opening- structurally-framed opening in a wall where a door unit will be located



Shim- Thin piece of material used to fix the distance between parts during assembly

SHP- Super High Profile

Sidelite- Panel installed on one or both sides of the door containing decorative glass

Sidelite Door System- continuous header, one piece mulls, continuous sill, sidelite seats

Sill- Horizontal door component at the bottom of the door system fixed under the door panel

Sill Cap- There are three types:  synthetic, oak, vinyl, and aluminum

Sill Cover- Provides ultimate protection for the sill/cap

Sill/Jamb Gaskets- Provides better seal to frame

Single Door System- header, jamb, weatherstrip, corner pad, door bottom, and sill

SL- Sidelight Sill

Strike Jamb- strike plate side of the doorjamb

SR- Screen Rail (Patio)

Strike Retainers – a plastic piece to which strike and deadbolt plates are attached.

Strike Support – an aluminum extrusion used in Ultimate Astragals that hold the strike retainers.

Substrate- Wood portion; supports aluminum and is used to provide an area for stapling, screwing and caulking



Transom- The decorative glass component installed above the door.

Triple Patio- Active and 2 inactive panels

Thermally Broken- Plastic cavity filled to create a break in the aluminum to prevent cold transfer and condensation inside the house.

Three-Point Seal - an ultimate astragal solution that creates a seal between the active door, the inactive door and the flush bolt.

Trim Caps – plastic pieces used on various astragals.  These pieces are applied to the ends of the astragals in order to improve the cosmetic appearance of the astragal.  Some trim caps also provide for a seal against the header weatherstrip in the door unit.

Trim Plugs – small plastic pieces on various astragals.  These pieces are applied to the ends of the astragals in order to improve the cosmetic appearance of the astragal.

Two Piece Mull- two pieces of wood stapled together to form a wider mull



Ultimate Astragal Lite- developed as an inexpensive version of the Ultimate Astragal using a floating boot instead of a built-in boot.

Ultimate Astragal- seals French doors by addressing the air and H2O problems other astragals face.  The Ultimate has a floating boot built in the base, a three-way sealing system, and it encapsulates the inactive door to enhance the seal.

Ultimate Body- Main component that gets punched for screw hole attachment.



V- Vinyl Fixed Cap

Veneer - thin film adhesively attached to product, making up the exposed face in a variety of finishes



Warping- A curve or deformed part on the product that is permanent; can be caused by assembly, installation or by exposure to heat or moisture

Weatherstrip- A vinyl strip- loose or inserted into a mull or jamb part that provides an air tight seal around the door

Width of Sill

  • 465- 4.56” or 9 1/16” (Narrow Sill-Likely Not To Be Extended)
  • 487- 4.87” or 4 7/8” (Narrow Sill-Which is Commonly Extended)
  • 562- 5.62” or 5 5/8”
  • 581-5.81” or 5 13/16”
  • 781- 7.8” or 7 13/16”






Z Series – synthetic sill assembled with stapes and molded foam substrate.

Z+ - entirely synthetic, injection molded sill with enhanced thermal break.