Where a Low Number Usually Comes From
When two proposals on the same house are thousands apart, the gap is almost always concentrated in a handful of line items. In roughly the order we see them:
- Tear-off vs. layover — going over the existing shingles saves a day of labor and an entire dumpster, and it hides whatever the deck has been doing for the last twenty years
- Decking allowance — one bid assumes zero bad sheathing, another publishes a per-sheet rate; only one of those can survive a surprise without a conversation in the driveway
- Ice-and-water membrane — a code-minimum strip at the eave against coverage carried past the warm wall, into valleys and around penetrations
- Flashing — new chimney, step, sidewall and apron metal against reusing what is already up there
- Ventilation — priced as a balanced intake-and-exhaust system or not addressed at all
- Drip edge and starter — real components, sometimes quietly absent
- Disposal and protection — dumpster, driveway protection, magnet sweeps, landscaping
- Workmanship warranty — length, who backs it, and whether it is written anywhere
The fastest test
Lay the bids side by side and circle every line that appears on one and not the others. You will usually find the price difference in under five minutes, and you will know what question to ask each contractor.
Price Is What You Pay. Cost Is What the Roof Charges You.
A roof that lasts twenty-two years at $16,000 costs about $730 a year. The same house re-roofed for $12,500 that fails at twelve years because it was never vented costs about $1,040 a year — and that is before the second tear-off, the drywall in the upstairs bedroom, or the insulation that got wet along the way.
Northern Wisconsin compresses that math. Freeze-thaw cycling, long snow loads and ice at the eave punish shortcuts faster here than they do in a milder climate. The omissions that matter most up north — ice-and-water coverage, intake ventilation, new valley and sidewall metal — are also the least visible from the ground, which is exactly why they are the easiest things to leave out of a bid.
When a Lower Bid Is Genuinely the Better Buy
Sometimes it is. A contractor with the crew already working two roads over has real savings to pass along. A shorter dump haul, a simpler roofline than another estimator assumed, a three-tab-to-architectural upgrade you did not actually need, a slower month — these are legitimate reasons for a lower number, and a good contractor can explain them without getting defensive.
The distinction is whether the savings came from efficiency or from subtraction. Ask directly: “What is in the other estimate that is not in yours?” An honest answer to that question tells you more than another round of price negotiation ever will.
How We Write an Estimate
Roof Masters has been roofing the Northwoods since 2014, out of Tomahawk, in a family that has been in the trade since the 1940s. Our estimates are written so that they can be compared to somebody else's: the exact product line, the underlayment, how far the ice-and-water membrane runs, which flashings are new, the ventilation plan, the disposal, the cleanup, and a published per-sheet deck rate agreed before the roof is ever opened.
Estimates are free, and they can be done on-site or virtually with aerial measurement when that is easier for you. If you already hold two bids and cannot tell what separates them, bring them along — walking through line by line is a useful hour whether or not you hire us.
Common questions
- Should I always avoid the lowest roofing bid?
- No. Avoid the bid you cannot explain. If a contractor can show why their number is lower — scheduling, a shorter haul, a simpler roof than another estimator assumed — that is a real answer. If the number is lower because items are missing from the scope, you are not saving money, you are deferring it.
- What is usually missing from a cheap roofing estimate?
- Most often: a decking allowance, ice-and-water coverage beyond the code minimum, new flashing metal, ventilation work, and a written workmanship warranty. Those five items account for most of the gap we see between bids on the same house.
- How much should a new roof cost in northern Wisconsin?
- Architectural asphalt generally runs about $4.75 to $8.00 per square foot installed, with standing-seam metal considerably higher. Pitch, access, layers and deck condition move any of those numbers.