Roofing & Moisture Protection Estimating Services (CSI Division 07)
Protect building envelopes and contractor profitability with precise Division 07 estimates from InSite Estimating. We calculate exact roof squares, tapered insulation slope packages, parapet flashings, and waterproofing membranes for commercial and residential roofing contractors.
Scope Overview & Specification Context
Roofing estimating demands rigorous geometric precision and deep knowledge of manufacturer warranty requirements. A flat roof is never truly flat; tapered insulation sumps, crickets, expansion joints, parapet flashings, and mechanical roof curb penetrations represent major cost components that are frequently underestimated.
InSite Estimating provides comprehensive Division 07 roofing and moisture protection takeoffs. We model complex roof geometries, pitch multipliers, membrane lap allowances, tapered insulation slope designs, coping caps, counterflashings, and roof drainage systems.
Who Relies on Our Roofing & Moisture Protection Estimating
Our takeoff deliverables directly support trade contractors and general builders during critical bidding windows:
- Commercial Roofing: Commercial Roofing Contractors bidding on single-ply (TPO/EPDM/PVC), modified bitumen, and standing seam metal roofs
- Residential Roofing: Residential Roofing Companies estimating asphalt shingle replacements, slate, and tile roofs
- Waterproofing Subcontractors: Waterproofing Subcontractors pricing below-grade foundation membranes and plaza deck waterproofing
- General Contractors: General Contractors validating building envelope subcontractor bids and reviewing scope coverage
Contract Drawings & Details Audited
To ensure complete trade quantification without missed scope or overlapping division boundaries, we review:
Itemized Quantities & Units Measured
Our takeoff sheets itemize all materials according to recognized trade fabrication and installation units:
- Roof surface areas in square feet and standard roofing squares (1 Square = 100 SF)
- Tapered polyisocyanurate insulation average R-value thickness and cricket square footage
- Linear footage of parapet wall copings, gravel stops, drip edges, and fascia metal
- Linear footage of base flashings, counterflashings, valley metal, and step flashings
- Discrete counts of pipe penetrations, exhaust curb flashings, scuppers, and roof drains
Labor Burdens & Equipment Allocations
Trade pricing requires factoring labor productivity curves, crew composition, and specialized installation equipment:
- Roof height, building access, and crane/conveyor hoisting requirements for roof loading
- Fastener and adhesive application rates based on regional wind uplift ratings (e.g. FM 1-90)
- Tear-off and disposal labor for re-roofing projects, including hazardous core testing
Standard Trade Deliverables Included
Every trade package is delivered in editable, audit-ready digital formats for immediate contractor use:
Division 07 Roofing Master Takeoff Spreadsheet in Excel with live formulas
Color-Coded Vector PDF Roof Plan Markups detailing slopes, crickets, and flashings
Material Bill of Materials itemizing rolls, insulation boards, adhesives, fasteners, and plates
Trade Inclusions & Boundary Demarcations
Preventing trade overlaps and unfunded scope gaps through crystal-clear inclusion and exclusion schedules:
Standard Trade Inclusions
- Roofing membrane, cover boards (densdeck), vapor retarders, and multi-layer rigid insulation
- Sheet metal flashing and trim: parapet copings, counterflashings, gutters, and downspouts
- Below-grade fluid-applied and sheet waterproofing, dimple drainage boards, and protection board
Standard Trade Exclusions
- Structural roof deck repair or replacement of rusted metal pan deck / rotted wood sheathing
- HVAC equipment mechanical disconnect/reconnect and gas piping elevation modifications
Trade Takeoff & Quality Audit Workflow
Our systematic 6-phase review guarantees mathematical consistency, proper scale calibration, and spec alignment:
Roof Plan & Spec Audit
Reviewing roof assembly layers, thermal R-value requirements, wind uplift ratings, and warranty scope.
Pitch & Slope Calculation
Applying pitch slope multipliers (e.g. 4:12, 6:12, 8:12) to calculate true rafter surface area.
Insulation & Cricket Modeling
Quantifying base polyiso boards, high-density cover boards, and tapered slope crickets.
Perimeter & Flashing Takeoff
Measuring parapet copings, edge metals, valleys, eaves, rakes, wall flashings, and penetrations.
CSI Trade Estimating & Quality Control Protocols
To protect trade subcontractors from bid-day omissions and disputed change orders, our estimators follow a multi-tier technical verification procedure:
Digital Planimeter & Scale Calibration
Every drawing sheet is calibrated against known architectural or structural dimensions before takeoff begins. We audit PDF scaling across sheet revisions to detect unannounced scaling distortions.
Cross-Division Scope Demarcation
We audit intersecting division notes—such as embedded anchor bolts, weld plates, penetrations, backing plates, and flashing—ensuring no scope is omitted between trade jurisdictions.
Material Waste & Lapping Calculations
Net in-place physical measurements are clearly isolated from gross installation material requirements, explicitly accounting for fabrication cuts, rebar lap splices, end-matching, and geometric site waste.
Addenda & RFI Scope Reconciliation
All issued addenda, engineer response RFIs, and revised drawing clouds are cross-checked against base sheets, ensuring your bid package reflects the latest contract documentation on bid day.
Frequently Asked Questions About Roofing & Moisture Protection Estimating
Frequently Asked Questions
Direct, technically accurate answers to common preconstruction estimating questions.
We apply mathematical slope pitch multipliers to the flat architectural footprint. For example, a 4:12 roof slope uses a multiplier of 1.054, a 6:12 slope uses 1.118, and an 8:12 slope uses 1.202, ensuring exact square footage regardless of roof pitch.
Get an Itemized Takeoff for Roofing & Moisture Protection Estimating
Upload your plans and project manual specifications. Our preconstruction team will provide an audit-ready takeoff package for your upcoming bid deadline.