RED SEAL CERTIFICATION GUIDE 2026
VERIFIED ANSWERS READY
⫸ What is the minimum unit rise for a stair in a multi family unit.
Answer: 125mm
⫸ What is the minimum length of a construction ladder required to
reach a platform 3.8 m above the ground. Answer: 4.95
⫸ What is the correct name for the groove in a masonry or concrete
wall that receives flashing. Answer: Reglet
⫸ What is the minimum length of a stair landing. Answer: 900
exterior
860 inside
⫸ What is the minimum unit run for a stair. Answer: 255 private
280 public
⫸ What is the minimum number of risers for a stair in a multi family
dwelling. Answer: 3 risers
⫸ What is the minimum number of risers in a single-family
residence?. Answer: No minimum
,⫸ What is the purpose of insulation stops?. Answer: Prevent
insulation from blocking soffit or attic ventilation
⫸ What is the purpose of the poly that is placed between the top and
cap plate on interior walls?. Answer: Provides continuous air/vapor
barrier across healing
⫸ What is the preferred slope for wedges used in house stringers.
Answer: 1:16
⫸ If architectural and structural drawings are in conflict, what
drawing overrides the other?. Answer: Structural overrides
architectural
⫸ How would you describe the left-hand reverse door?. Answer:
Standing outside the room, the hinges are on the left, pull to open
⫸ What is the maximum length of time between mixing and placing
concrete?. Answer: 2 hours
⫸ Where are setting blocks required on a window?. Answer: Two at
the quarter points
⫸ What is the ratification strip used for in form work?. Answer:
Lumber nailed to the inside of the former to create a control joint or
architectural feature
, ⫸ What dimensions are added together when figuring out the length
of a lintel. Answer: Jack stud (38) shimming space (12), jamb
thickness(19), clearance (3mm exterior 2mm interior), and door width
⫸ Portable Router directions and when they can be changed. Answer:
Typically it is counter clockwise on the outside and clockwise on the
inside.
Move it clockwise (or a climb cut in the direction of the cutter) if tear
out is a concern
⫸ What is the correct name for the rafter that runs between two
Valley rafters. Answer: Valley cripple Jack
⫸ Maximum horizontal and vertical anchor points for a scaffold.
Answer: 6.4 horizontal max spacing
4.5 vertical max spacing
⫸ What is the safe workload ratio?. Answer: 5:1
⫸ What does (WHMIS) stand for?. Answer: Workplace Hazardous
Materials Information System
⫸ What are the minimum width of underlayment and flashing that
need to be used for an open valley?. Answer: 915mm and 600mm
VERIFIED ANSWERS READY
⫸ What is the minimum unit rise for a stair in a multi family unit.
Answer: 125mm
⫸ What is the minimum length of a construction ladder required to
reach a platform 3.8 m above the ground. Answer: 4.95
⫸ What is the correct name for the groove in a masonry or concrete
wall that receives flashing. Answer: Reglet
⫸ What is the minimum length of a stair landing. Answer: 900
exterior
860 inside
⫸ What is the minimum unit run for a stair. Answer: 255 private
280 public
⫸ What is the minimum number of risers for a stair in a multi family
dwelling. Answer: 3 risers
⫸ What is the minimum number of risers in a single-family
residence?. Answer: No minimum
,⫸ What is the purpose of insulation stops?. Answer: Prevent
insulation from blocking soffit or attic ventilation
⫸ What is the purpose of the poly that is placed between the top and
cap plate on interior walls?. Answer: Provides continuous air/vapor
barrier across healing
⫸ What is the preferred slope for wedges used in house stringers.
Answer: 1:16
⫸ If architectural and structural drawings are in conflict, what
drawing overrides the other?. Answer: Structural overrides
architectural
⫸ How would you describe the left-hand reverse door?. Answer:
Standing outside the room, the hinges are on the left, pull to open
⫸ What is the maximum length of time between mixing and placing
concrete?. Answer: 2 hours
⫸ Where are setting blocks required on a window?. Answer: Two at
the quarter points
⫸ What is the ratification strip used for in form work?. Answer:
Lumber nailed to the inside of the former to create a control joint or
architectural feature
, ⫸ What dimensions are added together when figuring out the length
of a lintel. Answer: Jack stud (38) shimming space (12), jamb
thickness(19), clearance (3mm exterior 2mm interior), and door width
⫸ Portable Router directions and when they can be changed. Answer:
Typically it is counter clockwise on the outside and clockwise on the
inside.
Move it clockwise (or a climb cut in the direction of the cutter) if tear
out is a concern
⫸ What is the correct name for the rafter that runs between two
Valley rafters. Answer: Valley cripple Jack
⫸ Maximum horizontal and vertical anchor points for a scaffold.
Answer: 6.4 horizontal max spacing
4.5 vertical max spacing
⫸ What is the safe workload ratio?. Answer: 5:1
⫸ What does (WHMIS) stand for?. Answer: Workplace Hazardous
Materials Information System
⫸ What are the minimum width of underlayment and flashing that
need to be used for an open valley?. Answer: 915mm and 600mm
