What Should Be in a Roofing Bid? 6 Lines Most Contractors Leave Off |n Kansas City
You get three bids for a new roof. One is $9,400, one is $12,800, one is $16,200. Same house, same shingle color, same crew size for all you can tell. So you pick the middle one, or the cheapest, and hope.
That's not a fair comparison, and it's not your fault. Most roofing bids in Kansas City are one page with a number at the bottom. There's nothing in them to compare.
Here's what a real bid should tell you, and the specific line items that separate a roof that lasts 25 years from one that leaks in four.
A roof is a system, not a stack of shingles
This is the part that costs homeowners the most money, so it's worth sitting with.
When people think about a roof replacement, they think about shingles. Shingles are maybe 40% of what keeps water out of your house. The rest is underlayment, flashing, sealed valleys, edge metal, ventilation, and the details around every pipe, vent, and chimney that punches through the deck.
A cheap bid isn't usually cheap because the contractor found a better price on shingles. Everybody buys from the same two or three suppliers at roughly the same price. A cheap bid is cheap because things were left out — and the things left out are almost always the system components, not the shingles you can see from the street.
The 6 lines most bids leave off
When you get a bid, look for these by name. If they're not written down, they're not included, no matter what anyone says on the phone.
1. Ice and water shield at eaves, valleys, and penetrations
A self-adhering membrane that seals around nails and stops water that backs up under shingles. This is what protects you during an ice dam — the thing that happens every February in Kansas City when snow melts on a warm attic and refreezes at the cold eave. Code requires it in our climate zone. Plenty of bids skip it anyway.
2. Synthetic underlayment over the entire field
The layer between your deck and your shingles. Old-school felt paper tears when it gets wet and wrinkles in the heat. Synthetic is stronger, lays flat, and protects the deck if your roof sits exposed overnight mid-tear-off. Cost difference is small. Performance difference is not.
3. New drip edge on eaves and rakes
Metal flashing along the roof edges that directs water into the gutter instead of behind it. Without it, water wicks back onto your fascia board and rots it out from behind, slowly, where you can't see. This is also code. It's also one of the most commonly skipped line items in the entire trade.
4. Balanced intake and exhaust ventilation
Your attic needs air moving through it — in at the soffits, out at the ridge. Get this wrong and you cook your shingles from underneath, trap moisture in the winter, and drive up your cooling bill in July. It also matters for a reason most homeowners never hear: improper ventilation voids most manufacturer shingle warranties. You can have a 50-year shingle and no warranty at all.
A proper bid states the ventilation plan and ties it to your attic square footage. "Add a ridge vent" is not a plan.
5. New pipe boots and reflashed wall and chimney details
Every penetration through your roof is a hole somebody sealed. Pipe boots — the rubber collars around plumbing vents — are the single most common source of roof leaks in Kansas City, and they cost almost nothing to replace during a tear-off. Reusing old flashing to save $200 on a $12,000 job is how you end up with a stain on your ceiling in year three.
6. Starter course at eaves and rakes
A purpose-made starter strip that gives the first row of shingles something to seal to, at the bottom edge and up both sides. Cutting corners here is why you see roofs with shingles peeled back along the edges after a windstorm. Some crews use cut-up shingles as starter, which doesn't put the adhesive strip where it needs to be.
What else belongs in a real bid
Beyond those six, a bid you can actually trust should spell out:
Tear-off vs. layover. How many existing layers are coming off. A second layer over an old roof is cheaper today and a problem later — it hides deck damage and voids some warranties.
Decking replacement terms. Nobody knows how much rotten plywood is under there until the shingles come off. The bid should state a per-sheet price so you're not negotiating in the middle of a tear-off with your house open.
The specific shingle. Brand, product line, and color. "Architectural shingle" is a category, not a product.
Warranty terms, both of them. The manufacturer warranty covers the material. The contractor's workmanship warranty covers the install. They're different, and the second one is only worth as much as the company standing behind it.
Cleanup. Magnet sweep, dumpster, and who hauls the debris.
Permit. Who pulls it and whether it's in the price.
Proof of insurance. General liability and workers' comp, with certificates you can actually see.
The question that tells you the most
Ask each contractor: "Can you walk me through what's in your bid that isn't in the cheap one?"
A contractor who knows their scope will go line by line and tell you exactly what they included and why. A contractor who's cutting corners will talk about how long they've been in business, or how their crews are the best in town, or drop the price on the spot.
That last one is worth paying attention to. If a number drops $2,000 because you hesitated, the number was never real.
Why the cheapest bid is usually the most expensive
A roof that fails in year six costs you the full replacement again, plus whatever the water did to your deck, insulation, and drywall on the way through. And you'll be paying for it yourself, because a maintenance failure isn't a covered claim.
The gap between a corner-cutting bid and a complete one is usually a few thousand dollars on a job that's supposed to last 25 years. That's a couple hundred a year for the difference between a roof and a liability.
Compare the six lines first. Then compare the number.
Aligned Contracting writes line-item scopes for every roof we bid across the Kansas City metro — both sides of the state line. Free inspection, written assessment, no high-pressure sales.
Call us at (913) 343-8258 or book in the link below!
