Roof Flashing Calculator

Estimate valley flashing, step flashing, drip edge sections, and pipe boot quantities for your roof — with an instant cost comparison across aluminum, galvanized steel, and copper.

Valley Flashing

Valley Length (ft)

Number of Valleys

Step Flashing

Step Flashing Runs (ft)

Drip Edge

Eave LF (ft)

Rake LF (ft)

Pipe Boots / Vent Flashing

Pipe Boot Count

Waste Factor (%)

Pricing (edit to match local rates)

Valley ($/8ft pc)

Step Flashing ($/ea)

Drip Edge ($/10ft)

Pipe Boot ($/ea)

Valley Pieces

8 ft sections · $0.00

Step Flashing

0 pcs

$0.00

Drip Edge

16 pcs

10 ft sections · $128.00

Pipe Boots

$36.00

Purchase Option	Quantity	Est. Cost
Aluminum	19 pieces	$164.00
Galvanized SteelBest value	19 pieces	$126.00
Copper	19 pieces	$505.00

Cheapest material: Galvanized Steel at $126.00Galvanized steel is the most economical for standard residential roofs. Aluminum offers better corrosion resistance near coastal areas. Copper is premium but provides the longest lifespan (50+ years) and a distinctive aesthetic.

This is a material estimate only. Actual quantities may vary based on roof complexity, overlap requirements, and local building codes. Always consult your roofing supplier for exact coverage per piece.