Roofing Estimates Live and Die on Details
Two identical footprints can need very different shingle orders once pitch, hips, and valleys enter the picture. Pitch multiplies the area you must cover. Hips and valleys eat extra material in cuts. Overhangs add sheathing that a floor plan never shows. Skip any of these and the bundle count looks fine on paper but comes up short on the roof.
These guides explain the terms and the numbers: how pitch changes area and material quantities; why hip and steep roofs need more waste allowance; felt versus synthetic underlayment; drip edge and ridge cap coverage; shingle types from 3-tab to architectural and what each costs per square; what tear-off involves; and why ventilation needs intake and exhaust, not just roof vents.
When you are ready for numbers, the Roofing Calculator converts footprint, pitch, and overhang into squares, bundles (including ridge cap), underlayment, and cost.
Understanding Roof Pitch: How It Affects Area and Material Quantities
Roofing Waste Factor: How Much Extra Material Do You Need?
Roofing Underlayment Basics: Felt, Synthetic, and Where Each Goes
Roofing Takeoff from Plans: Measure & Estimate Materials
Roof Ventilation Basics: Intake, Exhaust, and Why Balance Matters
Roof Flashing Basics: Valleys, Chimneys, Walls, and More
Roofing Shingle Types: 3-Tab, Architectural, and What Each Costs
Roofing Tear-Off Basics: Layers, Disposal, and What To Expect
Roofing Drip Edge and Ridge: Where Each Goes and How Much You Need
Roofing Metal Basics: Standing Seam, Metal Shingles, and Cost
Use the Roofing Calculator to estimate shingles, underlayment, nails, and waste for your roof.