Short answer
A second opinion is worth getting whenever the first quote is vague about scope, arrives with pressure attached, or calls for a full replacement on a roof you have seen no evidence is failing. It is not about collecting the lowest number, it is about seeing whether two roofers describe the same roof the same way. At Lightning Construction the inspection and written estimate are free with no obligation, and a salesperson does come to the house.
On this page
Get a second opinion when the first quote tells you what to pay but not what the crew will do. Two honest roofers looking at the same New Jersey roof should agree on the big facts: how many layers are up there, whether the decking is sound, which flashings are shot, whether this is a repair or a replacement. When two quotes disagree about those facts, one of them is wrong, and it is worth an hour of your time to find out which.
A second opinion is not a shopping exercise for the lowest number. The lowest number is often lowest because something was left out.
When a second roof opinion is worth the week it costs
There are specific triggers. If any of these describe your situation, book the second look.
- The estimate is one line and a total. If it does not list tear-off, underlayment, ice and water shield, flashing, drip edge, ventilation, disposal and the permit, you cannot tell what you are buying.
- You were told the price expires today, or this week, or at the end of the visit. Roofing material prices do not move that fast.
- Nobody went in your attic. Half of what a roof is doing shows up on the underside of the deck, not on top of the shingles.
- You were shown damage photos that could have come from any roof. Ask for shots that include something identifiable on your house, a vent, a chimney, your own gutter line.
- You have one leak in one spot and were quoted a full replacement with no explanation of why the other three slopes need to come off.
- The quote includes an open allowance for decking or layers, which means the price can grow after the tear-off.
- A knock on the door after a storm started the whole conversation.
When a second opinion is just a delay
Say so plainly: sometimes the first answer is right and waiting makes things worse.
If water is coming into the house right now, stop the water first. Get the roof tarped or the leak repaired, then shop the replacement at your own pace. If you have already had two real inspections and both contractors described the same failures, a third visit is unlikely to change the decision, it just pushes the job into worse weather. And if your insurance claim has a deadline in the paperwork, chasing a fourth quote past that date can cost you more than any price difference.
What makes two roof quotes actually comparable
The quotes have to describe the same work before the prices mean anything. Run this list against both.
| Item | What to look for in both quotes |
|---|---|
| ItemTear-off | What to look for in both quotesHow many existing layers are coming off, stated as a number |
| ItemDecking | What to look for in both quotesWhat happens to rotted plywood, and whether the price for it is already included |
| ItemUnderlayment | What to look for in both quotesSynthetic or felt, and how much of the roof it covers |
| ItemIce and water shield | What to look for in both quotesWhich areas get it: eaves, valleys, around penetrations |
| ItemFlashing | What to look for in both quotesNew step and counter flashing at walls and chimney, or reused |
| ItemDrip edge | What to look for in both quotesIncluded at eaves and rakes |
| ItemVentilation | What to look for in both quotesRidge vent, intake, and whether existing vents are replaced |
| ItemShingle | What to look for in both quotesLine and color, not just the brand |
| ItemPermit | What to look for in both quotesWho pulls it and who meets the inspector |
| ItemDisposal | What to look for in both quotesDumpster and cleanup, including a nail sweep |
| ItemWarranty | What to look for in both quotesManufacturer coverage and the contractor's own workmanship coverage, in writing |
If one quote is cheaper and three rows of that table are blank, you have found the reason. The guide on how much a new roof costs in New Jersey explains what actually drives the total on a real house, which is roof size, pitch, penetrations, existing layers and deck condition, not the sales script.
Price bands here are set by the municipality's median home value from ACS 2024 five-year estimates. Most asphalt replacements run $9,000 to $22,000 in standard-value towns, $14,000 to $35,000 in higher-value towns, and $25,000 to $60,000 for large or luxury homes. A second quote landing in a different band than the first, for the same house, is worth a direct question.
How to get a second opinion that is actually independent
- Do not show the first estimate at the start of the visit. Let the second contractor inspect the roof and the attic and tell you what he found on his own.
- Ask him to count the layers out loud and tell you how he counted them, usually at a rake edge or a vent penetration.
- Ask for photos of every item he is pricing, and look at them on his screen while he is standing there.
- Ask whether he thinks a repair would hold. A roofer willing to talk you out of a replacement is giving you real information.
- Only then show the first quote, and ask about the specific lines that differ.
- Get the second estimate in writing before anyone leaves, with the same level of detail you asked for in the table above.
The questions worth asking either contractor, and the red flags that should end the conversation, are laid out in the guide on how to choose a roofing contractor in NJ.
How to decide when the two opinions disagree
Separate the disagreement into three types.
They disagree about the facts
One says two layers, the other says one. One says the decking is soft over the garage, the other says nothing about decking. Facts are checkable. Ask each for the photo or the measurement that supports the claim, and whoever cannot produce one is guessing.
They disagree about the scope
Both agree the chimney flashing is failing, but one is reusing the step flashing and the other is replacing it. This is not a dispute about your roof, it is a dispute about how to do the work. Reused step flashing is one of the most common reasons a replacement quote comes in low.
They disagree about repair versus replacement
This is the one that matters most to your wallet. Ask each contractor what the rest of the roof looks like: granule coverage, shingle flexibility, the age of the existing flashing, the condition of the deck from the attic side. A repair is the honest answer when the damage is local and everything else has life left. A replacement is the honest answer when the field shingles are at the end of their service life and you would be spending money on a roof that fails next year anyway.
What a second opinion should cost you
Nothing. At Lightning Construction, the inspection and the written estimate are free with no obligation, and a salesperson does come to the house. That is the honest description of the visit.
Two things in the written estimate are worth knowing about before you compare. There is no deposit, so nothing is due until the work is finished and you have inspected it. And there are no change orders, because the conditions that normally trigger one, extra shingle layers, damaged decking, inadequate flashing, are found at the free inspection and priced into the quote. That removes the single biggest variable in comparing roof prices, which is whether the number on the page is the number you will pay.
Lightning pulls the permit from your municipality's construction office under the New Jersey Uniform Construction Code and attends the inspection, in every municipality. You file nothing.
What to do next
If the first quote gave you a total and nothing else, book a second inspection and hold the two side by side using the table above. If the contractors disagree, ask both for the photos behind the claim and let the evidence settle it. If an insurer is involved, read the New Jersey roof insurance claim guide first so the second inspection is documented in a way the adjuster can use.
When you are ready for the second look, schedule a free inspection and written estimate. It is free, it is no-obligation, and you will leave the conversation knowing what is actually on your roof.
