Cost breakdown
This estimate converts a 1,200 sq ft footprint into roof area using a standard pitch multiplier, adds a moderate waste factor, then applies the installed cost range for Mod. Bitumen. It is a planning range, not a contractor bid, but it gives homeowners a fast baseline before comparing local quotes.
Mod. Bitumen installed roof system
Low, average, and high allowance
$7,983–$19,160
Tear-off, disposal, and site cleanup
Low, average, and high allowance
$1,320–$3,300
Pipe/chimney/skylight flashing (2×)
Low, average, and high allowance
$300–$900
What changes the price?
Pitch and access
Steeper roofs require more safety setup, more labor time, and often more waste.
Tear-off layers
Old shingles, decking surprises, and disposal fees can move the final quote.
Valleys and penetrations
Chimneys, skylights, pipe boots, vents, and valleys add flashing detail and labor.
Material grade
Mod. Bitumen ranges widely by manufacturer, warranty, color, thickness, fasteners, and trim package.