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Roofing is one of the most measurement-intensive trades in construction. Unlike interior trades where you measure flat floor areas, roofing requires calculating sloped areas using pitch multipliers, accounting for hips, valleys, ridges, rakes, eaves, dormers, and penetrations — each affecting material quantities differently. A 10/12 pitch roof requires 30% more material than a flat roof of the same footprint, and missing a single valley run can throw off flashing and underlayment quantities by hundreds of linear feet. Generic estimators often use simplified "square footage times cost per square" calculations that ignore these variables. Our roofing estimators measure roof planes individually from architectural drawings using Planswift and Bluebeam, apply correct pitch factors, calculate waste percentages by material type (shingles waste differently than TPO membrane), and count every boot, pipe jack, and curb flashing. This level of detail is why roofing contractors trust Phoenix Estimations over general-purpose estimating services. Related reading: How to Estimate Thermal Insulation Costs and Construction Estimating Checklist for Bidding.
Roofing Systems
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Steep-slope roofing requires pitch-adjusted area calculations, starter strip and ridge cap quantities, valley metal lengths, step and counter flashing at walls, drip edge measurements, and ice and water shield in eave and valley areas. Our estimators calculate each roof plane separately using the actual roof pitch from architectural sections, then apply material-specific waste factors (typically 10-15% for shingles, 5-8% for metal panels).
Systems: Asphalt Shingles, Wood Shakes, Slate, Clay Tile, Concrete Tile, Standing Seam Metal, Metal Panels
Low-slope roofing involves membrane square footage with seam overlap calculations, insulation board counts by R-value and thickness, vapor retarder area, cover board quantities, adhesive and fastener calculations, edge metal and coping cap lengths, roof drain counts, pitch pocket quantities, and expansion joint treatments. We calculate tapered insulation cricket layouts for proper drainage and include all penetration flashings for curbs, pipes, and equipment supports.
Systems: TPO, EPDM, PVC, BUR, Modified Bitumen, SPF, Fluid-Applied, Green Roof
Every roofing estimate from Phoenix Estimations includes precise quantities for each of these components, measured directly from your architectural roof plan and building sections.
Roof Area (Squares)
Underlayment / Felt
Ice & Water Shield
Ridge & Hip Cap
Valley Flashing
Step & Counter Flashing
Drip Edge / Edge Metal
Starter Strip
Roof Insulation Boards
Coping Cap / Parapet
Pipe Boots & Jacks
Roof Drains & Scuppers
Gutters & Downspouts
Fasteners & Adhesives
Ventilation (Ridge/Soffit)
Curb Flashings
Our roofing estimating process is different from a general construction takeoff. Roofing demands trade-specific measurement techniques that account for slope, geometry, and material-specific waste. Here's how our team approaches every roofing project:
Roof Plan Analysis
Review architectural roof plan, building sections, and roof details to identify all roof planes, pitch angles, and penetration locations.
Digital Area Measurement
Measure each roof plane separately in Planswift, then apply the correct pitch multiplier from building sections to get true sloped area.
Linear Measurements
Measure ridges, hips, valleys, rakes, eaves, wall-to-roof transitions, and edge conditions. These drive flashing, edge metal, and accessory quantities.
Penetration Count
Count every pipe boot, vent jack, curb, skylight, equipment support, and roof hatch. Each requires specific flashing details.
Waste & Overlap Factors
Apply material-specific waste (10-15% shingles, 5-8% metal, 3-5% membrane) and seam overlap requirements for membrane systems.
Pricing & Delivery
Apply RSMeans zip-code based pricing for material and labor. Senior estimator review. Deliver Excel spreadsheet with color-coded roof plan markups.
For more on estimating methodology, read our guide to estimating construction costs and construction cost estimating guide.
Our roofing estimating services are used by every type of roofing professional — from single-crew residential roofers to multi-state commercial roofing operations.
Re-roofs, new construction, storm damage repairs, and insurance restoration. We calculate shingle bundles, felt rolls, ice and water shield, flashing, and starter strip — ready for your supplier order.
TPO, EPDM, PVC, BUR, and modified bitumen systems for flat and low-slope commercial roofs. We include insulation board counts, tapered insulation layouts, and membrane seam calculations.
Full Division 7 roofing scope estimates for budget planning and subcontractor bid verification. We help GCs confirm roofing sub pricing before contract award.
Pitch-Adjusted Measurements
We don't just measure flat plan area. Every roof plane is adjusted for actual pitch using architectural sections, giving you true material quantities.
Material-Specific Waste Factors
Shingles, metal, and membrane each waste differently. We apply the correct waste percentage for your specific roofing material — not a generic 10%.
24-48 Hour Residential
Residential roofing estimates delivered within 24-48 hours. Commercial flat roof projects typically 2-4 business days based on complexity.
Supplier-Ready Material Lists
Our roofing estimates are formatted so you can hand them directly to your roofing supply house for material ordering — no reformatting needed.
55-65% Cost Savings
An in-house roofing estimator costs $60K-$80K/year. Our monthly package covers 10-15 roofing projects for $2,000 — saving you 55-65%.
Marked-Up Roof Plans
Every roofing estimate includes color-coded roof plan markups showing measured areas, linear measurements, and penetration locations for verification.
Roofing contractors face a unique estimating challenge: bid volume is seasonal and unpredictable. During storm season or spring, you might need to price 20+ roofs per week. During winter, volume drops to a handful. Maintaining a full-time roofing estimator at $60,000-$80,000/year means paying the same overhead regardless of bid volume.
Outsourcing your roofing estimating to Phoenix Estimations lets you scale up and down with demand. Our per-project pricing starts at $150 per roof, and our monthly packages handle 10-15 projects at a fixed $2,000/month. During peak season, you can add projects as needed. During slow months, you pay nothing. This flexibility is why roofing contractors prefer outsourcing over in-house. For more on outsourcing benefits, read our guide on value engineering in construction.
"Before Phoenix Estimations, we were guessing on shingle quantities and losing money on every third job. Now our material orders match the job site within 2-3%. That accuracy pays for the estimating service many times over."
"We run a 12-crew commercial roofing operation and bid on 30+ jobs per month. Phoenix handles every single estimate. Their TPO and EPDM takeoffs are the most detailed we've seen in 20 years."
"Storm season used to overwhelm our office — 40 estimates needed in a week. Phoenix scaled up instantly and delivered every one on time. That flexibility is worth more than any full-time hire."
The Problem
A commercial roofing contractor in Ohio was losing money on TPO membrane jobs because their flat-roof takeoffs consistently underestimated edge metal, coping cap, and curb flashing quantities by 15-20%. They were also missing tapered insulation crickets on complex roof geometries, leading to $8,000-$12,000 in change orders per project. With 15 bids per month and a 19% win rate, they needed both accuracy and volume improvements.
The Solution
Phoenix Estimations provided complete commercial roofing takeoffs including membrane area with seam calculations, insulation board counts with tapered cricket layouts, all edge metal and coping lengths, curb and pipe flashings, roof drain details, and fastener calculations. Each estimate was delivered in 2-3 business days with marked-up roof plans showing every measurement area and linear dimension. We used Planswift for measurements and RSMeans for Ohio-specific pricing.
The Outcomes
Edge metal and flashing quantity accuracy improved to within 3%, eliminating mid-project change orders entirely. The contractor saved over $96,000 annually in eliminated overruns. With faster estimates, they increased bid volume from 15 to 28 projects per month. Win rate jumped from 19% to 38% because accurate quantities produced tighter, more competitive pricing. Annual revenue grew by 52% in the first year.
Ready to achieve similar results?
Get Your Roofing EstimateHow to Estimate Thermal Insulation Costs
Blog article covering insulation estimation methods including roof insulation.
Construction Estimating Checklist for Bidding
Complete checklist for contractors preparing bids on roofing and other trades.
Thermal & Moisture Protection Estimating
Full Division 7 scope including roofing, waterproofing, insulation, and siding.
