Roofing Flashcards
Are we required to inspect internal gutter and downspout systems
No
Are we required to operate roof ventilators
No
Are we required to determine life expectancy of roof coverings or number of layers
No
Are we required to determine the adequacy of roof ventilation
No
Asphalt shingles should not be installed on slopes less than
2:12
Why report knob and tube wiring
Dangerous. Some insurance companies might not insure it
Recessed Iights in attic must be rated
IC or 3” clearance from insulation
What ratio is a steep slope
4:12
Slopes down to 2:12 are allowed if
There are double underlayments
Minor standing water on low slopes is permitted as long as it dries within
48 hours
Hot asphalt is also referred to as
Bitumen
Flat roof materials
Built up roofing, single ply membranes, roll roofing, spray polyurethane foams
Why could a roof be wavy and uneven
Too many layers (more than 2)
Describe asphalt shingles
Fibreglass/felt mat with asphalt
Granules deflect sunlight
What are wood shingles or shakes made of
Cedar or cypress
What number and colour of wood shingles/shakes should be used
1- blue label (free of sapwood and knots)
How much space in between wood shakes/shingles and why
1/4” space between to allow for expansion when wet
Wood shingles/shakes joints should be offset by how much and line up with every ____ course
Offset 1/2”
Every 4th course
In Wood shingles/shakes, what is required between building paper and shingles
1/4” thick synthetic mesh
Wood shingles/shakes violate fire codes. True or false
True in some cases. Check local codes
Describe built up roofs
3-5 alternating layers of heavy roofing felt and hot asphalt Modified bitumen (torched on cap membranes that fuse them to fibreglass= reinforced inter piles or base coats)
What is an SPF roof
Spray polyurethane foam
What to look for on spf roofs
Gaps around verticals elements
In an spf roof, how could foam shrinkage happen
If not properly sealed with a UV resistant coating