How to Vet a Roofing or Fireplace Contractor: A 5-Point Quality Checklist for Homeowners

Honestly, after four years of reviewing deliverables for a residential building materials supplier, I've seen how the sausage gets made — and sometimes it's not pretty. This checklist is for homeowners or small builders who need to hire a contractor for a roof, a gas fireplace, or both. It's built around the single most expensive mistake I see: assuming a low quote is the final quote.

What This Checklist Is For

Use this when you have a shortlist of two or three contractors for a roofing or fireplace installation. Don't use it for simple repairs or minor trim work. The goal is to separate the vendor who will deliver a quality job at a predictable price from the one who will nickel-and-dime you with change orders.

Step 1: Ask for the 'What's NOT Included' List

Trust me on this one. Every contractor has a standard scope of work. The smart ones list what's not included right there in the quote. The ones who want to hook you with a low number don't.

Get the quote in writing. Then, ask point-blank: 'What's not included in this price?'

For a roofing job, the hidden items are usually:

• Disposal of old shingles (hauler fees)
• New flashing around chimneys or vents
• Repair of rotted decking under the shingles
• Permit fees

For a gas fireplace or insert, watch for:

• Gas line run from the house supply
• Vent pipe installation (if it's not a direct-vent model)
• Electrical hookup for the blower or remote
• Removal of an old fireplace unit

I've learned to ask 'what's NOT included' before 'what's the price.' The vendor who lists all fees upfront—even if the total looks higher—usually costs less in the end. In Q1 2024, we audited 12 contractor quotes for a client. The lowest initial quote was $4,200, but with the add-ons, it hit $6,800. The highest initial quote was $6,200, with zero surprises.

Step 2: Get Specifics on Materials and Brand

Here's something vendors won't tell you: a quote that says 'standard shingles' or 'gas fireplace' is basically a blank check for them to use the cheapest thing they can buy. You need a brand and a model number.

For roofing, ask for: brand, series (e.g., 'Owens Corning Duration'), and color. For a gas fireplace, ask for the exact model of the insert or unit. If you're looking at a Valor fireplace, for instance, there's a big difference in price and features between their basic radiant model and a high-efficiency direct-vent unit with a blower.

To check if the contractor is being fair, search the material cost yourself. For a 50,000-unit annual order, we see wholesale prices that are about 40% below retail, but a contractor's markup of 20-30% on materials is standard. If they're charging double the retail price you find online, that's a red flag.

Step 3: Check the Timeline and the 'Buffer'

What most people don't realize is that 'standard turnaround' in the quote often includes buffer time. A contractor who says 'three weeks' might finish in two, or they might start in three weeks and take another week. The buffer is for managing their production queue—it's not necessarily how long your job takes.

Ask: 'What is the guaranteed start date and completion date, and what happens if you don't meet it?'

A good contractor will give you a specific window. A less reliable one will say 'sometime in late April.' If I remember correctly, we had a project where the contractor showed up two weeks late because they booked three jobs for the same crew. The cost of that delay? A $22,000 redo and a delayed launch for the client.

Step 4: Verify Their Permits and Insurance — Don't Just Take Their Word

This sounds basic, but it's the step most people skip because they feel awkward asking. Don't. Ask for the license number and their insurance certificate. Then verify it with your local building department.

For a fireplace installation, the gas line and venting are the big safety concerns. Wrong venting can cause carbon monoxide issues. Wrong installation can void the fireplace warranty and your homeowner's insurance. Under federal guidelines on advertising, claims of 'fully licensed and insured' need to be substantiated. Ask to see the paperwork.

We once had a contractor claim they were 'a preferred installer' for a major fireplace brand. A quick call to the brand's customer service line confirmed they weren't on the list at all. That quality issue cost us a redo and shook our trust.

Step 5: The 'Check Register' Test — Review the Final Invoice Carefully

After the job is done, you'll get the final bill. This is where the 'check register'—the record of your payments—becomes your best friend. Compare it line-by-line to the original quote. If they added a line item for 'disposal fee' or 'miscellaneous supplies' that wasn't in the original scope, question it.

There's something satisfying about a perfectly executed project. After all the stress of managing a home renovation, seeing a final invoice that matches the original quote—that's the payoff. But if the final amount is 20% higher than the quote and they can't explain why, that's a deal-breaker.

The surprise isn't the price difference. It's how much hidden value comes with a contractor who charges a fair, transparent price. A 'cheaper' quote for a roof that doesn't include new flashing? You're gonna pay double in the end for a repair that costs more because they have to tear out work they already did.

Final Note: When to Walk Away

If a contractor gets defensive when you ask about 'what's not included,' walk. If they can't give you a specific brand and model, walk. If they ask for a large deposit before starting (more than 30% is a red flag), walk.

The bottom line: a low price is a promise. A transparent price is a contract. The latter is worth paying for.