What every estimate must include
Before you look at price, check that these elements are present. If any are missing, ask for them before you go further.
The materials section
This is the most important section to read carefully. The shingle line item should specify a brand, a product name, and a quantity in squares (one square = 100 sq ft of coverage). "Architectural shingles, 28 squares" is not enough. A good estimate says something like "Owens Corning Duration Series, Driftwood, 28 squares" or "GAF Timberline HDZ, Charcoal, 30 squares."
Why does the product name matter? Because different product lines within the same brand have very different warranties and performance ratings. A base-level shingle and a premium shingle from the same manufacturer can differ by 15 years in expected lifespan.
A properly detailed estimate protects both parties. Vague language around materials is a sign to ask more questions before signing.
Underlayment and protection layers
The estimate should specify whether synthetic underlayment or felt paper is being used. Synthetic performs better, resists tearing, and handles moisture better than traditional 15-lb or 30-lb felt. It's become the standard for good reason.
Ice and water shield is a separate line item in a complete estimate. It should be applied to eaves (the bottom edge of the roof), all valleys, around chimneys, around vents, and around skylights. If the estimate just says "underlayment — full roof" without calling out ice and water shield separately, ask where and how it's being applied.
Labor scope
Labor should be its own line. If labor and materials are bundled into a single number, you can't compare that estimate to others accurately. Scope should specify that tear-off of existing shingles is included, how many layers are being removed, and what happens if rotted decking is discovered — whether it's billed at a stated rate per sheet or bundled as a set allowance.
Warranty language
There are two separate warranties that matter. Understand both before signing.
Manufacturer warranty covers the shingles themselves against defects. These range from 25 years to lifetime, depending on the product. Some manufacturers offer enhanced coverage if the installation is done by a certified contractor — worth asking about.
Workmanship warranty covers the contractor's installation. This is what protects you if the roof leaks because of how it was installed, not because the shingles failed. These range from one year (too short, frankly) to ten years or a lifetime. One year means the contractor believes in their work for exactly one year.
A $11,500 estimate with 50-year shingles and a 10-year workmanship warranty is not the same product as a $9,000 estimate with 25-year shingles and a 1-year workmanship warranty. Compare what you're actually getting, not just the number at the bottom.
Questions to ask before you sign
What happens if rotted decking is found? Is there a per-sheet rate agreed upfront, or will I be billed as discovered? A responsible contractor gives you a number before they start.
When are permits pulled? Permits should be pulled before work begins, not after. If permits are required in your area and the contractor doesn't mention them, ask directly.
What are the payment milestones? A deposit of 20 to 30 percent is reasonable. Balance due on completion, after your walkthrough. Full payment before start is not a reasonable term.
What does cleanup include? Magnetic sweep? Dumpster removal? Gutter inspection? Get it in writing.
The goal isn't to be difficult — it's to be clear. A contractor who's uncomfortable with specific questions about their own estimate is telling you something important.