I3 Flashcards
What are the purposes of windows
Provide light and ventilation to the inside of a building and allows occupants to see out.
Why are triple - glazed units expensive
Extra plane of glass
Frame size bigger
What does the term “low-e” mean
Associated with reflective films
Means film will not let radiant heat waves emit into or from the building
What type of heat loss does a reflective film reduce
Radiant heat loss
How do double-glazed units reduce heat loss
Air space provides a small amount of insulation against heat loss by conduction
The film on the surface of the additional pane also adds insulation
What causes the seal in a sealed unit to fail
Double glazed windows played on south side of building
Commercial cleaners like ammonia or vinegar
Most effective way to reduce heat loss through windows
Reduce the window area
What is a million used for
Divides frame vertically and separates the window units
What is the slope of the sill
11 degrees
Describe a thermal break
Insulating material incorporated into the metal framed windows
Why aren’t vinyl frames commonly available in dark colours
Darker colours absorb heat and this may distort the frame or sash
What is a rebate flange used for
Hides the old frames
What types of windows should butt hinges not be used for
Awning or hopper as the weight of the widow ales it difficult to control when opening or closing
What types of windows are commonly fitted with sliding hinges
Casement, awning and hopper style windows
When are casement adjusters needed
When butt hinges are used to support the sash
What’s the purpose of a snubbed
Used midway between hinges of tall casement windows to prevent bowing
Whats the purpose of a lifter
Under latch side of a sagging sash to support the weight when the window is closed
What is the fastener spacing for windows
150-200 mm O.C
Minimum slope for a sill or head flashing
6%
Size of bead of caulking should be used between the flank and the wall
3/8
Why are nails bent over the top flange
Allow window to move
What products should you avoid when cleaning window hardware
Vinegar Ammonia Citrus based cleaners Abrasive cleaners Industrial strength cleaners
What problem can occur if using silicone as a lubricant
Can cause plastic hardware to become brittle
Most economical and common window
Sliding windows
