⚡ Roof Replacement Cost Calculator
free🏠 Roof Shape & Dimensions
4 m (13 ft)30 m (98 ft)
4 m (13 ft)20 m (66 ft)
10° (2/12)60° (21/12)
Rafter length
6.4 m / 21 ft
Ridge height
2.9 m / 9 ft
Roof area (net)
165.1 m² / 1,777 sq ft
Incl. waste
181.6 m² / 19.6 squares
🧱 Material, Insulation & Labor
📊 Your Roof Project Estimate
Roof area (net)
165.1 m²
1,777 sq ft · 19.6 squares
Total cost estimate
$17,305
$9.74/sq ft · $105/m²
Material lifespan
30–50 yrs
Architectural Shingles
Incl. waste (10 %)
181.6 m²
1,955 sq ft to order
Cost Breakdown
Architectural Shingles (material + waste)$6,902
Underlayment / felt / ice-water shield$826
Insulation (Fiberglass batts)$2,972
Labor (installation)$6,605
Total estimate$17,305
🏅 Pro Tip: Don't skimp on underlayment
Ice-and-water shield at eaves and valleys, plus felt underlayment on the rest, is your last line of defence against leaks. Budget $5–8/m² ($0.50–0.75/sq ft) for quality underlayment — it's 2–3 % of the job but can prevent thousands in water damage. For steep pitches over 45°, add 10–15 % extra waste allowance for cut pieces at hips and valleys.
Powered by Clean Invoice — Free renovation & contractor tools