How to Read a Roofing Estimate Line by Line

Roofing estimates are written in trade shorthand, and two bids can land close on the bottom line while covering wildly different work. The way to compare them is line by line. Here's what each line on a Shoals-area roofing estimate actually means — and which missing lines should make you ask questions before you sign.

Tear-Off and Disposal

Tear-off is the labor of stripping the old roof down to the wood decking, along with the dumpster and landfill fees to get rid of it. Check how many layers the bid covers — many older Shoals homes have two layers of shingles up there, and a second layer means more tear-off work than a bid priced for one. If the estimate says overlay instead of tear-off, it means new shingles nailed over the old ones. That's cheaper, hides the decking, and shortens the new roof's life.

Underlayment

Underlayment is the water-shedding layer rolled over the decking before the shingles or panels go on — the roof's backup raincoat. Synthetic underlayment is the modern standard; asphalt-saturated felt is the older, cheaper option. In valleys, at eaves, and around penetrations, many roofers also install a sticky peel-and-stick membrane — often called ice-and-water shield — where water is most likely to sneak in. An estimate that doesn't mention underlayment at all isn't a bargain; it's an incomplete roof.

Flashing

Flashing is the metal that seals the transitions — where the roof meets a chimney or a side wall, around skylights and pipe vents, and in valleys. Step flashing runs up the roof-to-wall joints; counterflashing covers it. The question to ask: is the bid installing new flashing or reusing the old? Reused flashing is where a surprising share of new-roof leaks start, because bent-up metal never seals the same way twice. Flashing should be named on the estimate, in a metal you'd want on your house for decades.

Ventilation

A roof has to breathe. Intake vents in the soffits pull cool, dry air into the attic while exhaust vents near the ridge let hot, moist air escape. When that loop is balanced, shingles last longer, attics stay drier, and manufacturer warranties stay valid — poor ventilation is a standard reason warranty claims get denied. A bid that replaces the roof but never mentions intake or exhaust vents is treating the symptom and skipping the disease. Ask your contractor to explain the ventilation plan before you sign.

Decking Replacement

Decking is the wood sheeting under everything. Tear-off is when it finally gets inspected, and any sections softened by past leaks have to be replaced before the new roof goes down. Most estimates price decking as found damage, charged per sheet as it's discovered, because nobody can see it until the old roof is off. A fair bid tells you the per-sheet rate before work starts so there are no surprises mid-job.

Cleanup and Warranty

Cleanup should be spelled out: dumpster placement, protection for landscaping and AC units, and a magnetic sweep for nails in the grass — the line that saves your tires and your bare feet all summer. Warranties come in two kinds, and you want both in writing: the workmanship warranty from your contractor, covering how the roof was installed, and the manufacturer's material warranty, covering the product itself. Ask how long each lasts and whether the manufacturer's coverage needs to be registered after installation.

Comparing Bids: Make Them Line Up

• Same scope: identical material brand and line, same flashing plan, same ventilation work — or the totals mean nothing.
• Missing lines: the low bid is often just the short bid. Underlayment, permit fees, and disposal are the usual omissions.
• Licensing and permits: confirm the contractor is licensed to work in Alabama and note who pulls the local permit.
• Payment schedule: payments tied to milestones — materials delivered, tear-off done, final sign-off — not a big check on day one.
• Change orders in writing: decking surprises happen; a fair contractor quotes the extra before proceeding.

Once you can read every line, you can hold every bidder to the same scope — and that's how the right contractor stands out. Start with the roofing companies, gutter specialists, and exterior contractors in our Shoals-area directory.