Chicago, Illinois · Specialty PVC
Moody Bible College Auditorium
Specialty Sika Sarnafil Décor rib roofing, with roof preparation, copper gutters, and detailed flashing coordination.
Paul Cadena · Experience & estimating
Experience behind the estimate.
A few projects from my professional background, followed by a worked example of how I turn a takeoff into an itemized estimate and a clear proposal.
Selected project experience
Different buildings. Practical roofing experience.
These projects are part of Paul Cadena's professional background. The photos highlight experience with these roof systems and project conditions; they are not presented as projects contracted or completed by North Star Roofing Systems.
Waterloo, Iowa · EPDM
John Deere TCAO
Large-facility EPDM roofing experience involving drainage, skylight and curb details, and coordination around building operations.
Schiller Park, Illinois · TPO
Gate Gourmet
Commercial TPO roofing experience with insulation, tapered drainage, perimeter metal, and roof-to-wall transitions.
Lemont, Illinois · EPDM
Lemont Professional Building
Office-building roof replacement experience, including insulation, EPDM, curb heights, and rooftop equipment coordination.
Hillside, Illinois · TPO
Hillside Industrial Building
Multi-tenant industrial roofing experience with deck conditions, TPO installation, drainage, and phased rooftop work.
From takeoff to proposal
See what goes into the estimate.
A worked example using Paul's Hobby Lobby estimating sample. It connects measured quantities, itemized Excel costs, and a concise owner-facing scope.
Historical example, not a current quote. This is an estimating demonstration based on an EDGE report dated June 1, 2026. It does not represent a North Star contract, completed project, or an offer to Hobby Lobby.
01
Measure the roof
Enlarge EDGE snapshot
The measured roof area is 55,561.81 square feet. Field roofing, walls, curbs, drainage, and perimeter conditions are tracked separately.
02
Organize the quantities
Enlarge takeoff snapshot
The takeoff tab keeps the units visible: SF, LF, and EA. The source references and scope questions remain in the working workbook.
03
Build the itemized cost
Enlarge estimate snapshot
Quantity, unit cost, and extension are reviewed by component. These are historical sample rates, not current supplier quotations or purchase-ready order quantities.
Snapshots are cropped renderings of Paul's actual EDGE and Excel samples, not recreated spreadsheet mockups. Excel row spacing was condensed for readability; quantities and values were not changed. Only excerpts are shown here.
Illustrative proposal
A clear scope. A clearly identified price.
This is how the sample can be summarized for an owner or general contractor. A real proposal would be finalized only after the open scope items and current pricing are resolved.
North Star Roofing Systems
Hobby Lobby
TPO Roofing Example
Prepared by Paul Cadena · Estimating demonstration
NOT FOR ACCEPTANCE
Measured roof area55,561.81 SF
Sample systemAdhered 60-mil TPO
Proposed scope for this example
- Preparation and coordination. Review deck readiness, roof access, staging, and protection needs before work begins. Existing-roof demolition and deck replacement are not included in this example.
- Roof assembly. Provide the insulation and attachment components carried in the sample takeoff, followed by fully adhered 60-mil TPO. Final insulation layers, R-value, taper layout, and any cover board must be confirmed against the approved assembly.
- Flashings and accessories. Provide the taken-off wall, curb, and penetration flashings, pipe boots, sealer pockets, and walkway protection. Coordinate roof-hatch flashing separately from hatch procurement.
- Perimeter and drainage metal. Provide the taken-off edge metal, counterflashing, gutters, and downspouts. Reconcile dimensions, profiles, and quantities before fabrication.
- Completion and closeout. Include the sample labor, equipment, and warranty allowances. Confirm the manufacturer's final warranty requirements and eligibility before any firm commitment.
Historical sample proposal amount$340,652.24
From the existing Excel sample, Summary!C12. Not a current quote, actual contract value, or price commitment.
Pricing basis and items to resolve
The total is carried directly from the existing workbook, using its historical quantities, rates, tax, and markup assumptions. It is not the different selling price shown in the original EDGE recap. No EPDM alternate is included.
- Roof hatches: two appear in the takeoff without a separate procurement price. Supply responsibility must be confirmed; do not treat hatch supply as included.
- Insulation: the zero tapered-condition legend and the Q-board material allowance must be reconciled, along with layer count, cover board, and required assembly.
- Edge metal: the 306.65 LF drawing quantity, 311.76 LF consolidated measurement, and 330 LF order allowance require reconciliation.
- Commercial basis: verify current supplier quotations, labor scope, material pack rounding, applicable tax, permit/bond requirements, and final exclusions before issuing a bid.
Example exclusions and limitations
No allowance is represented here for structural repairs, deck replacement, hazardous-material removal, existing-roof tear-off, HVAC or electrical modifications, or separate roof-hatch procurement. Additional project requirements must be scoped and priced before a firm proposal is issued.
No acceptance or signature: this page demonstrates the proposal format only. It is not an offer, contract, manufacturer warranty, or authorization to proceed.