What the Pros Look For: 7 Questions That Separate a True Roofer from a 'Shingle-Slammer'
As a homeowner, hiring a roofer is a high-stakes decision. The market is flooded with crews, from seasoned professionals to "storm chasers" and "shingle-slammers" who just want to get the job done fast and cheap. To protect your home, you need to think like an insider. At DISCOUNTED ROOFING LLC, we know what separates a true craftsman from the competition. You can find them by asking the questions that a low-bidder simply can't answer correctly.
First, ask them, "How will you be flashing the penetrations and valleys?" This is the single most technical question you can ask. A "shingle-slammer" will say they'll just use caulk or roof cement. This is wrong. A professional will start talking about step-flashing against walls, a new boot for your vent pipes, and whether they recommend an "open" or "closed-cut" valley system. Their answer will tell you if they understand that a roof's weak points are where things intersect, and that metal, not sealant, is the permanent solution.
Next, get specific about what's under the shingles. Ask, "What type of underlayment and ice barrier are you including, and to what specifications?" The cheap quote will just have "felt paper." A pro will specify a high-quality synthetic underlayment, which is far more durable and water-resistant. They will also specify that they are installing an ice and water barrier (a special self-adhering membrane) not just at the eaves, but around all penetrations and in the valleys, as required by code and best practice.
Then, you need to understand their crew. Ask, "Are the installers on my roof certified by the shingle manufacturer?" This is a critical distinction. Any crew can nail a shingle. A certified crew has been factory-trained on the system. This is about more than just skill; it's about your warranty. Many of the best, non-prorated warranties are only valid if the roof is installed by a certified installer. A "no" to this question could void your warranty before the job even starts.
After that, talk about ventilation. Ask, "Can you perform a calculation to ensure my attic's ventilation is balanced?" A novice will just say, "You need a ridge vent." An expert will get out a calculator. They will measure your attic's square footage, explain the 1/300 rule (1 sq. ft. of ventilation for every 300 sq. ft. of attic space), and then balance that ventilation between intake (soffit) and exhaust (ridge) vents. When looking for the Best Roofers in Philadelphia the one who talks about balanced airflow is the one who will protect your roof's lifespan and your energy bills.
Don't forget the warranty details. Ask, "Is your workmanship warranty a separate document, and what exactly does it cover?" Many will just point to the shingle wrapper. That's the material warranty. You need the labor warranty. A true professional will provide a separate, clear document that states they will fix any installation-related leaks for a set period, often 10 years or more. It's their personal guarantee.
You also need to know their logistics. Ask, "How will you handle debris, and will you be using a subcontractor for the dumpster?" This sounds like a small detail, but it's not. A pro will have a plan for a "ground-up" cleanup, including protecting landscaping. Knowing if they control the dumpster or if it's a third party is key. If a subcontractor cracks your driveway, it becomes a complicated insurance issue.
Finally, ask, "What is your protocol if you find rotten or delaminated roof decking?" A bad contractor will either ignore it and shingle over the rot (a catastrophic error) or hit you with a massive, undefined surprise bill. A pro will have a clear unit price in the contract—for example, "If any decking is found to be rotten, it will be replaced at X dollars per 4x8 sheet." This is a sign of an honest, transparent business.
These are the questions that go beyond a simple price. They test for deep industry knowledge, proper procedures, and a commitment to doing the job right. A contractor who can answer them all with confidence is the one you want protecting your home.