Reading Your Roofing Estimate
Roofing estimates use industry-specific terms: "squares," "starter strip," "drip edge," "ice-and-water shield." Let's decode a realistic full roof replacement quote for a typical 2,000 sq ft single-story home with a medium-complexity roof (a few valleys, one chimney, standard pitch).
Important note: Roofing is measured in "squares." One square = 100 square feet. A 2,000 sq ft house with standard overhangs typically has about 25 squares of roof area.
Sample Roofing Quote Walkthrough
Summit Roofing Co. — Proposal #R-2024-445
Customer: Karen & Tom Walsh | Property: 321 Pine Hill Rd, Denver, CO
Scope: Full tear-off and replacement, ~25 squares
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Line 1: Owens Corning Duration Architectural Shingles (25 squares) — $4,375
Architectural (dimensional) shingles are the standard for modern roofing — they're thicker, more wind-resistant, and more attractive than 3-tab shingles. Owens Corning Duration is a solid mid-range product with a 130 MPH wind rating and limited lifetime warranty. At $175/square for materials, this is a fair price.
What to check: Verify the specific product line. "Owens Corning Duration" is very different from "Owens Corning Supreme" (a basic 3-tab). Also note the color — make sure it's what you selected.
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Line 2: Tear-Off Existing Roof (1 layer) & Disposal — $2,500
Removing the old shingles, felt paper, and nails down to bare decking, plus hauling it all away in a dumpster. At $100/square, this is standard pricing. If you have two layers, expect $125-$150/square.
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Line 3: Synthetic Underlayment (25 squares) — $1,250
The waterproof membrane installed over the decking before shingles. Synthetic underlayment ($50/square installed) is superior to traditional #15 or #30 felt in every way: more waterproof, won't wrinkle, lasts longer.
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Line 4: Ice & Water Shield — Valleys, Penetrations, Eaves (8 squares) — $800
Self-adhering waterproof membrane in the most leak-prone areas: valleys (where two roof planes meet), around chimneys and vents, and along the eaves (first 3 feet from the edge). At $100/square, this is critical protection and often code-required in cold climates.
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Line 5: Ridge Vent (45 linear feet) — $540
Continuous ventilation along the roof peak. Proper ventilation extends shingle life and prevents ice dams. $12/linear foot installed is typical.
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Line 6: Drip Edge (200 linear feet) — $400
Metal flashing along the eaves and rakes (sides) of the roof. Directs water away from the fascia into the gutters. Required by code and essential for preventing water damage at the roof edges. $2/linear foot is standard.
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Line 7: Starter Strip Shingles (200 linear feet) — $300
Special shingles installed along the eaves before the first course. They provide adhesive to seal the first row against wind uplift. Skipping starter strip is a code violation and a common shortcut.
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Line 8: Chimney Flashing — Remove & Replace Step/Counter Flashing — $650
Flashing around the chimney is the #1 leak point on most roofs. Proper chimney flashing involves step flashing (L-shaped pieces woven into each course of shingles) and counter flashing (metal inserted into the chimney mortar joint). Reusing old flashing with a new roof is a false economy.
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Line 9: Pipe Boot Replacements (4 units) — $200
Rubber boots around plumbing vent pipes. These are a common leak point as they age and crack. Always replace with the new roof — $50/each is standard.
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Line 10: Decking Repair Allowance — $0 (priced per sheet if needed: $75/sheet)
This isn't a charge unless rotted decking is found during tear-off. The per-sheet price is specified upfront so there are no surprise costs.
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Line 11: Building Permit & Inspection — $350
Required for full roof replacements in most jurisdictions.
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Line 12: Cleanup — Magnetic Nail Sweep, Debris Hauling, Gutter Cleaning — Included
Professional cleanup should always be part of the scope.
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Quote Total: $11,365
This is a fair, comprehensive quote for a 25-square architectural shingle roof in a moderate-cost metro. National range: $8,000-$16,000 for similar scope depending on location, roof complexity, and material choice.
Red Flags: What's Missing From Your Quote?
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Your Roofing Contractor Conversation Checklist
No specific shingle product or brand listed
Why it matters: Without a product name, you can't verify quality, warranty terms, or fair pricing..
Notes:
No ice-and-water shield line item
Why it matters: This is the most critical waterproofing layer in leak-prone areas. Skipping it saves the roofer $500-$1,000 but leaves your roof vulnerable at its weakest points.
Notes:
No mention of flashing replacement
Why it matters: Old flashing around chimneys, walls, and vents should be replaced with the new roof. Reusing old flashing is the most common cause of leaks in new roofs.
Notes:
No permit included
Why it matters: Full roof replacements require permits in virtually every jurisdiction..
Notes:
No starter strip listed
Why it matters: Starter strip is code-required and prevents wind damage to the first course of shingles..
Notes:
No ventilation assessment or upgrades
Why it matters: Proper ventilation is essential for shingle longevity and is required by most manufacturer warranties..
Notes:
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