203c: Residential Roof Coverings Flashcards
Are roof coverings primary purpose for protecting a building from weather?
Yes
Are there only sloped and flat roofs? (2 types)
Yes. Flat or sloped, doesn’t matter equal or unequal
Are flat roof loads greatest at centre or perimeter?
Center
Is roof sheathing structural or just for show?
Structural; part of framing
What does 2R24 mean on a sheet of roof sheathing?
BINARY
2: horizontal edges must be supported (1 = no support)
R: roof
24: max span in inches (24”)
Do h clips support sheathing edges between spans?
Yes
Is roof sheathing similar to walls or floors?
Floors, t+g
Does fibreboard shesthing need CONTINUOUS support at all edges?
Yes
Why do vented roof panels make constructing more efficient?
OSB, vent space, and rigid insulation in one panel
Do I e dams form at exterior walls on roof?
Yes, hot and cold surfaces produce a freeze thaw cycle; ice can form on overhang
My roof is 30 years old, should I replace the shingles?
Probably. Lifespan of 20-40 years
Architectural
3 tab
Interlock
3 shingle types
Roof covering that gets rolled on
Roll roofing
Gosh
Hexagon
Octagon
Half cove
5 shake styles
1 Rough side and 1 sawn side on shake
Hand split shake
Is metal roofing lapped?
Yes
Can I put corrugated roofing on top of an existing roof?
Yes, to save removing the previous
Do we need more strength in roofs with tile or slate roofing?
Yes because it’s heavier
When might I use clear PVC roofing?
Greenhouses and other ag buildings, carports
What are layers of asphalt bitumen and asphalt roofing felt for?
Built up roofing
Bitumen waterproof?
Roofing felt reinforced?
gravel protects from sun?
Yes
Do we need to flash the valley for drainage before installing shingles?
Yes
Open valleys need 600mm wide sheet metal OR two layers of roll roofing?
Yes
Can I butt my shingles at the ends at a closed valley?
No, needs to run underneath 300mm
Does base flashing direct water away from a wall on a roof?
Yes
Is step flashing the same as base flashing?
Can be. But is stepped up along a slope along the wall
Do we need flashing to cover the top edge of base flashing?
Yes, counter flashing around an entire chimney for example
Why do we build crickets?
To direct water away from a wall that blocks the slope of the roof from draining (ie. chimney)
Does eave protection help moisture stay outside the building at building perimeter?
Yes. Prevents moisture from ice damming getting inside
Does plumbing fixtures need 20”x20” flashing on the roof?
Yes
Do we start shingles from the wave or the ridge?
Edge. Positive drainage from top of roof; shingles overlap the lower courses
Do wood shingles need an air gap underneath?
Yes. Spaced decking let’s the wood shingles breathe on all sides
Do we cap ridges and hips?
Yes
Is roll roofing quick and inexpensive compared to shingles?
Yes
