Bayview Glossary

Air infiltration

Air that leaks in and out of a structure through wall cracks and windows or doors is considered "infiltration". The lower a window’s air infiltration rating, the more airtight it is.

Argon gas

Argon gas

Argon is an odorless, colorless, non-toxic inert gas used in the window manufacturing industry to fill the empty spaces between glass panes. Because of it's properties it will increase insulation and energy efficiency in a window. An alternative to Argon is Krypton, which is a little more expensive, but is a better insulator.

Awning Window

Awning Window

Awning windows are an excellent choice for increasing light and ventilation into your home. On their own, or in combination with other types of windows, awning windows can be installed above or below other windows, or above doors. They are hinged at the top and open outwards at the bottom.

Bay Window

Bay Window

A bay window is a window made up of two angle framed window sides running at 30 or 45 degrees and a framed front window that runs parallel to the outer wall of the home to form polygonal shape.

Bow Window

Bow Window

A bow window is a home extrusion comprised of any combination of four to six individual casement or picture windows joined together to form a semicircle.

Cam lock

The device that pulls the sash together when being closed.

Cam locks

Cam locks are thumb-turn locks that are traditionally used on horizontal and vertical sliding (slider) windows. They tighten the interior and exterior sashes together to provide superior locking security and reduce drafts.

Casement Window

Casement Window

A casement is a window is a window that is attached to its frame by one or more hinges at one side.


Cladding is a layer of vinyl, aluminum, or fiberglass that is applied to the out side of certain types of windows. It protects the exterior of a wood or composite windows and is made of vinyl, aluminum, or fiberglass, eliminating painting.

Condensation (window)

Condensation (window)

Window condensation occurs when the surface temperature of the window frame, glass or sash is lower than that of the humid that touches it. The moisture vapor in the air changes into liquid water on contact with these cold surfaces. In extreme temperature differentials, condensation can build up and freeze. Energy-efficient windows can also occasionally have condensation on the exterior glass surface during periods of warm weather and high humidity.

CR-Value (Condensation resistance)

The CR-value indicates how well a product resists the formation of condensation (condensation resistance). CR is reported on a rating scale of 1 to 100. The higher the number, the better a product is at resisting condensation.

Door lites

These are the glass inserts that go into the door or sidelights. They come in different sizes and styles.

Door Sidelites

These are glass lites attached to the sides of a door frame to give the door unit a wider look.

Door slab

The door, usually made of steel. Fiberglass slabs are also available.

Door sweep

The bottom weather stripping on the door slab.


An insulating often decorative glass unit that appears in the middle portion or slab of a door. Doorlites can be installed in the upper, middle to upper or lower to upper section of a door. Stained Glass, etched glass, frosted glass, tinted glass, the options are unlimited.



A dormer is a roofed space which protrudes from a roof. It will typically include one or more windows.

Double glazing

Two panes of glass in a window used to increase energy efficiency and provide other performance benefits.

Double-hung Window

A window with two vertical operating sashes that slide up and down.

Egress Window

Egress Window

Egress windows are operational windows providing an emergency exit from the basement of a home. As such they must meet specific provincial safety standards requirements. Egress windows exits are usually installed at existing basement window locations, and most often require outside excavation and cutting of the basement slab to allow for a larger window installation.


Emissivity is a measure of the efficiency in which a surface emits thermal energy. It is defined as the fraction of energy being emitted relative to that emitted by a thermally black surface. A the black surface (black body) is a material that is a perfect emitter of heat energy and has an emissivity value of 1.

Energy Rating (ER)

The Energy Rating (ER) is a evaluative rating made by an authorized neutral organization. All window products are assessed using a strict common procedure that measures solar heat gain, heat loss through frames, spacer and glass and air leakage heat loss to come up with an overall product performance rating.

Energy Star Certification

Energy Star Certification

Energy Star certified windows are windows that meet or exceed high efficiency standards. Typically, a certified product is in the top 15 to 30 percent of its class for energy performance. Certified labels should be affixed to product ans should include: U-factor, Energy Rating, etc., climate zone it's certified for, a description of product and materials uses along with certification information.

Garden Window

Garden Window

A garden window very similar in principle to a Bay or Bow window, however much smaller in scale and is rectangular in shape.

Greater Ottawa Home Builders’ Association (GOHBA)

This is the mark of a professional – a member of the largest residential construction industry association in Canada. It's your best assurance that you will get the quality and value that you can enjoy for years to come. All GOHBA members have agreed to operate their firm in accordance with the spirit and intent of the GOHBA's By-Laws and Code of Ethics.

Grills (window)

Grills (window)

A window grill is a decorative element that can be added to windows to provide an stylistic accent. They are available in many different styles and colours and are usually set up in standard patterns. They can be inserted between glass panes or can be combined with an exterior element to give more of a traditional window style.

Hopper window

A bottom-hinged sash that opens inward.

Hung Window

Hung Window

A hung window is comprised of an upper and lower sash. A single hung has a fixed non-operational window at the top and a vertical sliding window at the bottom. A double hung has both operational upper and lower sash's.


Extension on the outside of a new window that makes it easier to install siding.


A jamb is a piece of material that forms the sides (vertical jambs) and top (top or head jamb)/bottom (bottom or lower jamb) of a window or door.

Krypton gas

Krypton gas

Krypton is an odorless, colorless, non-toxic inert gas used in the window manufacturing industry to fill the empty spaces between glass panes. Because of it's properties it will increase insulation and energy efficiency in a window. An alternative to Krypton is Argon, which is cheaper and less efficient as an insulator. A blend of air, krypton and or argon is used by some manufacture to balance cost and performance.

LoE 366 (Cardinal)

LoE 366 is often recommended when cooling costs outweigh heating costs in a home or when heat build-up is a concern. It has a very high reflection rate of the radiant outside heat to prevent heat gain in summer and in winter it still retains radiant with the heating of the home.

Low-E Glass

Low-emissivity or low-e glass is a glass with properties that allow for the transfer of less radiant heat. Emissivity is a measure of how much a glass surface transfers radiant heat.


A mullion is a vertical component that divides units of windows or doors. It can be used to for structural integrity or it can be used as a decorative element.


A 3-point locking system that comes installed in the door slab from the manufacturer.


Muntins are narrow strips of wood that divide individual panes of glass in a traditional window sash. In today's window world, grilles resemble muntins, but they are either sandwiched between double glass panes or installed over the outer surface of the glass to give the window a divided window pane look.

Nailing Flange

An extrusion attached to the window and used to attach the unit to the opening.

North Star Series 1000

North Star Series 1000

The 1000 Series North Star windows have a traditional look with a 3-1/4″ deep frame that is well suited for most applications. Energy efficient and durable, this window is available in a casement, awning, single-hung, double-hung, single-slider, double-slider and custom shape.

North Star Series 4000/5000

North Star Series 4000/5000

Series 4000/5000 North Star windows are available in two frame depths – 4-1/2″ (4000 Series) and 5-1/4″ (5000 Series) – this full frame window positions the insulated glass unit on the warm side of the building envelope (the interior wall of your home), for reduced condensation and greater comfort. Available in a casement, awning, single-hung, and single-slider.

North Star Series 4000/5000 Hybrid

North Star Series 4000/5000 Hybrid

The North Star 4000/5000 Hybrid Series window has the same features as the vinyl 4000/5000 series, but offers the benefits of an aluminum exterior in one innovative window system. This durable design unites the clean lines of an aluminum exterior with the easy maintenance and energy efficiency of a vinyl interior. Available in a casement, awning, single-hung, picture, custom and single-slider.

Palladian Window

A palladian window is a specific type of window design, a large, three-section window where the center section is arched and larger than the two side sections.

Picture Window

Picture Window

A picture window is a fixed window with no operational parts or hardware. Picture windows are the most economical of all other types of windows, they provide superior energy efficiency and they offer the greatest flexibility in sizing.


The R-value represents the resistance a material has to heat flow. It measures the effectiveness of insulation in stopping heat flow. There is no set rating scale.


RenoMark™ is the renovation industry's mark of excellence for renovators who believe in professionalism and are committed to their industry and to their businesses and are willing to pay annual dues to keep informed and to help educate consumers.


The sash is the part of a window that moves up and down (hung, double -hung windows). It is the frame that holds the glass in place. The vertical sides of the sash are called stiles, the horizontal top and bottom are called rails. If the window is split horizontally, the vertical strip that divides the 2 panes (lites) of glass is called and mullion, muntin or a glazing bar.


When you choose a registered SAWDAC company, you're choosing quality, professionalism and guaranteed workmanship. Peace of mind that the products they're buying, and the tradespeople installing them, are of the highest quality. Educate contractors on the demanding procedures and high standards they must follow in order to earn and retain their nationally recognized SAWDAC certification.


Acronym for simulated divided lite. A window grill profile that is placed on both the outside and inside of a window to give it a traditional look.

Self-cleaning window

A unique treatment that allows the glass to breakdown organic dirt that collects on the OUTSIDE surface. Dirt washes away with the next rain or hosing, leaving no streaks or spots. Pilkington Activ™ Self-Cleaning Glass is available in every North Star window as an option.

Shaped Window

Shaped Window

A shaped window is a non-standard custom shaped window. These shapes may include circular windows, oval shaped windows, arched windows, pentagon shaped windows, octagon shaped windows, trapezoid shaped window, triangular windows.


The bottom side of the door frame where the door slab meets the threshold. It is covered in heavy duty extruded aluminum.

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