Roof cant strip
$11.39 / LF
Roof cant strip costs about $11.39 per linear foot installed. This is a published starting point and varies by region and job.
RF-038 · MasterFormat 07 22 00 · LF
What’s in this rate
This unit is installing one linear foot of wood or fiberboard roof cant strip at a parapet or wall transition. The roofer cuts, sets, and fastens the cant ready for membrane flash. The rate is per linear foot. Parapet wall flashing, coping, and insulation are separate units.
Includes
- wood or fiberboard cant with waste
- fasteners
- cut, set, and fasten
- small tools
Excludes
- parapet wall flashing (see parapet-wall-flashing)
- parapet coping
- insulation field
- membrane flash over cant
What is a roof cant strip?
A roof cant strip is a beveled wood or fiberboard strip set in the corner where a low-slope roof deck meets a wall, parapet or curb. It turns that sharp right-angle corner into a gentle slope, so the membrane and base flashing can bridge the transition without cracking or being left unsupported. Cants are standard with built-up and modified bitumen roofing. Many single-ply membrane systems can turn a square corner without one, so the roofing manufacturer's details decide whether a cant is required.
Build-up
- Labor 0.12 hr × $65.00 wage and burden
- $7.80
- Material and small tools
- $1.61
- Direct rate (labor, material, and tools)
- $9.41 / LF
- Overhead 10% of direct
- $0.94
- Fee 10% of (direct and overhead)
- $1.04
- Loaded rate
- $11.39 / LF
Material breakdown
- Qty
- 0.2510% waste
- Unit
- EA
- Unit price
- $4.19
- Extended
- $1.15
- Qty
- —
- Unit
- —
- Unit price
- —
- Extended
- $0.46
Questions
What does a cant strip detail show?
A cant strip detail shows the strip seated at the roof-to-wall corner over the insulation or deck, with the field membrane running up onto it and the base flashing lapped over it and up the wall. The flashing is then terminated and covered by counterflashing or coping. The detail confirms material, fastening and how far the flashing extends.
Why is a cant strip used on a roof?
Asphalt-based membranes are stiff and can crack if folded into a sharp corner, and a void behind the flashing can split under foot traffic or movement. The cant strip supports the bend and spreads it out. It also helps water run away from the wall line instead of sitting in the corner.
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