Free Built Up Roof Pricing Calculator: Estimate Costs & Materials
Anchor takeoffs in felt plies and mopping asphalt—classic BUR logic, not single-ply rolls.
Felt plies & asphalt mopping
Enter plies of reinforcing felt and your mopping rate (gallons per 100 ft² per ply). Rates swing with porosity, weather, and whether you are dry-laying vs wet embed—tune from kettle tickets on past jobs.
Kettle planning
Enter plies and rates, then click Calculate.
How to Calculate Built Up Roof Pricing Calculator Manually
Step 1: Pin Down the Verified Roof Area
Never price from house sq ft. Get sloped roof surface from a plane-by-plane takeoff, aerial measurement, or pitch-corrected footprint. Wrong area is the #1 budget error.
Step 2: Choose Unit Rates from Current Quotes
Material cost per square (100 ft²) and labor cost per square change with markets and material types. Asphalt labor often runs $50–$120/sq; premium materials like slate or metal can be $200–$400+/sq installed.
Step 3: Add Accessory and Fixed Line Items
Drip edge, ice & water shield, underlayment, ridge cap, step flashing, and pipe boots are separate costs. A rough allowance is 10–20% on top of field shingles for accessories on a basic gable.
Step 4: Include Tear-Off, Disposal, and Permits
Single-layer shingle tear-off typically runs $1.00–$2.50/ft². Tile or layered tear-offs run $3–$5+/ft². Dumpster rental often adds $300–$600. Building permit fees range $50–$500 depending on jurisdiction.
Step 5: Apply Waste Before Finalizing Bundle Count
Add 5–8% waste for simple gables, 10–15% for cut-up hip or valley roofs, before converting ft² to bundle count. Always round up to whole bundles.
Built Up Roof Pricing Calculator Formulas
- Sloped roof area = Plan footprint ft² × Slope factor (e.g. 1.118 for 6/12 pitch)
- Field shingle material = (Sloped ft² × waste factor) ÷ Coverage per bundle × Price per bundle
- Project total = Field material + Accessories + Tear-off labor + Disposal + Permit fees
All prices are planning estimates only. Get current quotes from your local supplier and contractor before committing to a contract.
BUR: Redundancy Comes From Ply Build-Up, Bitumen Control, and Surface Protection
Felts and Bitumen Work Together
Each reinforcing ply is embedded in asphalt or adhesive, and consumption rates can change with weather, deck condition, and crew method. Tracking both felt rolls and bitumen volume keeps BUR estimates grounded in installation reality.
Surfacing Protects the Flood
Gravel embedment, reflective coatings, and cap options are not interchangeable finish lines. Price them separately after base ply and mopping volume are validated to avoid blending fundamentally different surface protection strategies.
Tear-Off Surprises Are Common
Older BUR roofs can conceal wet insulation and deck issues discovered only after removal. Keep contingency in tear-off, labor, and deck repair lines instead of assuming material quantities are the only variable.
Compare BUR and Mod-Bit Only After Scope Normalization
When alternates include modified bitumen, normalize insulation, flashing scope, and warranty assumptions first. Then compare with the modified bitumen cost calculator for a fair system-level decision.
Frequently Asked Questions — Built Up Roof Pricing Calculator
Why Gallons per 100 ft² per Ply?+
Kettle crews estimate mopping asphalt by how much bitumen each ply embeds—this mirrors field language better than a single $/ft². For better estimating accuracy, cross-check material pricing, labor rates, and waste contingency with your project notes, then confirm scope validation before final ordering. This keeps your final estimate aligned with real site conditions and reduces costly quantity revisions.
Does Surfacing Change Felt Count?+
Felt plies are usually specified regardless of gravel vs coating; surfacing changes follow-on tons or gallons—see the note in the tool. For better estimating accuracy, cross-check material pricing, labor rates, and waste contingency with your project notes, then confirm scope validation before final ordering. This keeps your final estimate aligned with real site conditions and reduces costly quantity revisions.
Can I Model Cold Applied BUR?+
Adjust gallons to adhesive equivalents from your supplier—this field is a generic bitumen volume placeholder. For better estimating accuracy, cross-check material pricing, labor rates, and waste contingency with your project notes, then confirm scope validation before final ordering. This keeps your final estimate aligned with real site conditions and reduces costly quantity revisions.
What About Hot Safety and Weather?+
BUR pricing should include kettle logistics, fire watch, and rain holds—outside the material math here. For better estimating accuracy, cross-check material pricing, labor rates, and waste contingency with your project notes, then confirm scope validation before final ordering. This keeps your final estimate aligned with real site conditions and reduces costly quantity revisions.