Two Roofers, Two Verdicts: Compare the Reasons Behind Each Call

You have had two roofers out to look at the same house, and they disagree. One says the roof can be repaired and has a few more seasons in it. The other says replace it now. You are not sure which to believe, and the instinct is to pick the one whose price is lower or whose voice sounded more sure. That is the wrong comparison. The useful thing to compare is the reasoning each roofer gave you for the call, because a verdict on its own tells you almost nothing you can check.

Why the verdict is the weakest part of the answer

A repair-or-replace call sounds like a single fact, but it rests on several smaller observations: the age of the shingles, how many layers are on the roof, how the decking feels underfoot, whether the flashing at the chimney and the valleys is still sound, and how the attic looks from below. Two careful roofers can look at the same roof and weigh those observations differently. One may treat a few curled tabs as a sign of an aging surface that repairs will not fix. Another may see the same tabs as a localized problem that a spot repair handles. Neither is necessarily wrong. But you cannot tell which reasoning holds up from the final word alone.

The reasons, if they are written down, let you line the two calls up against each other. You can see which observation each roofer leaned on, whether they named the same areas, and whether either one skipped something the other flagged.

Ask each roofer to name the observations, not just the conclusion

When you call the second roofer back, or when you ask the first roofer for written notes from the visit, ask for the list of things they looked at and what they found at each one. A useful reply names the slope, the location and the condition. "The north slope is failing" is a conclusion. "The north slope has lifted tabs along the upper third, granule loss at the eave, and a patched area near the vent" is a set of observations you can compare line by line.

Ask each roofer to say what would change their answer. A roofer who recommends repair should be able to name what would move them to replacement, such as finding more than one layer of shingles, soft decking after you probe it, or a repair that would have to touch a large share of the field. A roofer who recommends replacement should be able to say what would make repair reasonable. If either one cannot name a condition that would change their mind, the reasoning is probably more sales than inspection.

What St. Louis weather adds to the question

Local conditions matter here more than in many places, and they should show up in both sets of reasons. Freeze and thaw cycles work into small cracks, lift shingle edges and open seams around flashing. Hail season, which runs through the warmer months, can leave granule loss and bruising that a roofer reads differently depending on how closely they inspect. Ice damming at the eaves often shows up as staining on the soffit or on the ceiling near an exterior wall, and a roofer should say whether they checked the attic side of the eave, not only the shingles above it.

Age is the other piece. A three-tab roof that is well past the point where it can be reliably repaired often stops being worth patching, because each repair opens a new edge that the next freeze will work on. A roofer making a repair call on an older three-tab should say how many repairs they expect the roof to take before the cost passes replacement. A roofer recommending replacement on a younger roof should say what they see that makes age the wrong measure. Either way the sentence should be specific enough to test.

Lay the two sets of reasons side by side

Put the two sets of notes on one page, with a row for each area of the roof and a column for each roofer. Fill in what each one said about that area: the condition, the proposed fix, and the stated reason. Most disagreements narrow quickly once you do this. Often the roofers agree on the condition of most of the roof and split on one slope or one penetration. That split is the question to put back to both of them.

Pay attention to what is missing. If one roofer's notes say nothing about the attic, the decking or the flashing at the chimney, ask why. A missing area is not proof of a problem, but it is a gap in the comparison, and you should either get an answer or treat that roofer's verdict as less well supported.

Take the question back to each roofer in writing

Once you have identified the gap, send each roofer the same written question: which observation in the other roofer's notes would you dispute, and why. Keep the question neutral. Do not quote the other bid's price or try to bring either roofer into a bidding contest. The point is to get each roofer to engage with the specific reason, not to win.

Their written replies will tell you more than the first visit did. A roofer who engages with the disputed observation, agrees where the evidence is clear and explains a difference where it is not, is showing you how they reason. A roofer who restates the verdict without addressing the observation is showing you the same thing in a different way.

What a good written reason includes

• The area of the roof or house the reason applies to, named by slope, eave, valley or penetration.
• The condition observed, described in terms you could check from the ground or from the attic with a photo.
• The proposed fix, and what it would and would not address.
• The condition that would change the recommendation.
• The date of the inspection, so you can match the reasons to the conditions as they were on the day they were seen.

A written reason does not need to be long. Half a page per roofer, with photos attached, is enough for most homes. What matters is that each claim about the roof can be checked against the roof itself.

When the comparison still does not settle it

Sometimes the two roofers still disagree after the written exchange, and both reasons are defensible. In that case the disagreement itself is information. It may mean the roof is near the point where either repair or replacement can be justified, and the decision turns on how long you plan to stay in the house, what you can spend now, and how much risk you can accept before the next winter. Those are your decisions, and a good roofer should be willing to say so rather than push one answer.

If you want a third view, a separate inspection is a reasonable step. Ask the inspector to walk the same areas both roofers flagged, and give them the two sets of notes so they can answer the specific disagreement. You do not need to tell them which roofer you favor.

What to do next

Collect the written observations from each roofer, line them up by area, and send each one the same question about the observation they disagree with. Ask what would change their answer. Keep the replies together with the photos and dates. If the call is still unclear, a focused look at the disputed areas will usually settle it faster than another round of sales visits. Keys Roofing can be reached at (314) 220-2333 if you want to talk through the notes from your own inspection.