RESIDENTIAL CONTRACTOR CORRECT FINAL
QUESTIONS AND ANSWERS SET A+
✔✔The ends of each rafter or ceiling joist shall have not less than ____ inches of
bearing on wood or metal and not less than ___ inches of bearing on masonry/concrete.
- ✔✔Wood/Metal: 1- 1/2 in
Masonry/Concrete: 3 in
✔✔When headers spans exceed ___ feet, the header and trimmers must be doubled -
✔✔4 ft
✔✔The total net free ventilating area shall not be less than ___ of the area of the space
ventilated - ✔✔1/150
✔✔No less than ___ inch space shall be provided between the insulation and the roof
sheathing - ✔✔1 in
✔✔The net clear opening shall not be less than ___ x ___ inches for attic access -
✔✔20" x 30"
✔✔Unless roofs are sloped to drain over roof edges, roof drainage shall be installed
at... - ✔✔each low point of the roof
✔✔For asphalt shingles, ___-____ slope is one ply - ✔✔2:12- 4:12
✔✔For asphalt shingles, >____ slope is two ply - ✔✔4:12
✔✔Minimum of ___ fasteners per shingle in a 140+ mph zone - ✔✔6
✔✔Wood shingles _:__+ slope or greater - ✔✔3:12
, ✔✔Nails on asphalt shingles may be made of... - ✔✔stainless steel, galvanized steel,
copper, or aluminum
✔✔The top layer must be at least __ inches when using mineral surface roll roofing as a
valley flashing - ✔✔36 in
✔✔For wood shingles solid sheathing is required in areas where the average daily
temperature in January is ___ degrees Fahrenheit or less. - ✔✔25F
✔✔Wood shakes shall be laid with a side lap not less than ____ inches between joints
in adjacent courses - ✔✔1-1/2 in
✔✔Valley flashing minimum thickness No. ___ gage - ✔✔26
✔✔Valley flashing shall extend at least ___ inches from centerline each way - ✔✔11 in
✔✔Minimum slope for a built-up roof ___:__ - ✔✔1/4:12
✔✔Minimum slope for coal tar built up roofs - ✔✔1/8:12
✔✔Minimum slope for a modified bitumen roof is... - ✔✔1/4:12
✔✔_____ hours after the application of polyurethane roofing comply with R905.15 -
✔✔2-72
✔✔Metal flashings are not allowed to be reinstalled if... - ✔✔rusted, damaged, or
deteriorated
✔✔All combustible materials shall have a clearance of not less than __ inches from any
fireplace masonry work - ✔✔2 in
✔✔Chimneys shall extend at least __ feet higher than any portion of a building within 10
feet - ✔✔2 ft
✔✔Clay flue lining must extend not less than __ inches above the enclosing walls -
✔✔8
✔✔When two or more flues are located in the same chimney a masonry wall no less
than ___ inches must be built between the flues - ✔✔4 in
✔✔Chimneys shall be provided with crickets when the dimensions parallel to the
ridgeline is greater than ___ inches. - ✔✔30 in
QUESTIONS AND ANSWERS SET A+
✔✔The ends of each rafter or ceiling joist shall have not less than ____ inches of
bearing on wood or metal and not less than ___ inches of bearing on masonry/concrete.
- ✔✔Wood/Metal: 1- 1/2 in
Masonry/Concrete: 3 in
✔✔When headers spans exceed ___ feet, the header and trimmers must be doubled -
✔✔4 ft
✔✔The total net free ventilating area shall not be less than ___ of the area of the space
ventilated - ✔✔1/150
✔✔No less than ___ inch space shall be provided between the insulation and the roof
sheathing - ✔✔1 in
✔✔The net clear opening shall not be less than ___ x ___ inches for attic access -
✔✔20" x 30"
✔✔Unless roofs are sloped to drain over roof edges, roof drainage shall be installed
at... - ✔✔each low point of the roof
✔✔For asphalt shingles, ___-____ slope is one ply - ✔✔2:12- 4:12
✔✔For asphalt shingles, >____ slope is two ply - ✔✔4:12
✔✔Minimum of ___ fasteners per shingle in a 140+ mph zone - ✔✔6
✔✔Wood shingles _:__+ slope or greater - ✔✔3:12
, ✔✔Nails on asphalt shingles may be made of... - ✔✔stainless steel, galvanized steel,
copper, or aluminum
✔✔The top layer must be at least __ inches when using mineral surface roll roofing as a
valley flashing - ✔✔36 in
✔✔For wood shingles solid sheathing is required in areas where the average daily
temperature in January is ___ degrees Fahrenheit or less. - ✔✔25F
✔✔Wood shakes shall be laid with a side lap not less than ____ inches between joints
in adjacent courses - ✔✔1-1/2 in
✔✔Valley flashing minimum thickness No. ___ gage - ✔✔26
✔✔Valley flashing shall extend at least ___ inches from centerline each way - ✔✔11 in
✔✔Minimum slope for a built-up roof ___:__ - ✔✔1/4:12
✔✔Minimum slope for coal tar built up roofs - ✔✔1/8:12
✔✔Minimum slope for a modified bitumen roof is... - ✔✔1/4:12
✔✔_____ hours after the application of polyurethane roofing comply with R905.15 -
✔✔2-72
✔✔Metal flashings are not allowed to be reinstalled if... - ✔✔rusted, damaged, or
deteriorated
✔✔All combustible materials shall have a clearance of not less than __ inches from any
fireplace masonry work - ✔✔2 in
✔✔Chimneys shall extend at least __ feet higher than any portion of a building within 10
feet - ✔✔2 ft
✔✔Clay flue lining must extend not less than __ inches above the enclosing walls -
✔✔8
✔✔When two or more flues are located in the same chimney a masonry wall no less
than ___ inches must be built between the flues - ✔✔4 in
✔✔Chimneys shall be provided with crickets when the dimensions parallel to the
ridgeline is greater than ___ inches. - ✔✔30 in
