Most roof jobs start with a ceiling stain, a shingle in the yard, or a neighbor's dumpster across the street. What follows is the process most homeowners never have to think about until your old roof is compromised.
Let's go through the roofing contractor's perspective of the best way to replace your roof from start to finish.
If your South Jersey roof is nearing the end of its life, get a free in-person quote from Joe at Bibbo Builders before you commit to anything. He walks every roof himself and tells you exactly what he finds.
New Roof or New Shingles? That's the Real Question
A proper roof installation begins with an honest inspection of shingles, flashing, attic conditions, and the roof deck. Not just a brochure of shingle colors.
The most important idea: there's a real difference between replacing a roof system and covering an old surface with a fresh layer. If deteriorated plywood, compromised flashing, or trapped attic moisture get skipped, new shingles won't fix the actual problem. They'll just delay the next conversation by a few years.
"We can now say that we have a 'new roof' and not just 'new shingles.' There is a big difference between the two." — a Cherry Hill homeowner
Think of a roof as a drainage system, not armor. The shingles are the outer layer. The flashing seals every transition point. That's why most leaks show up at chimneys, vents, valleys, and wall intersections rather than across open shingle fields. The seams fail before the fabric does.
Here's what a complete roof installation looks like, step by step, and what to watch for at each stage.
Step 1: Inspect Everything, Inside and Out
Before a single material gets ordered, a thorough inspection covers both sides of the roof: missing or curled shingles, soft spots, sagging sections, flashing condition, and ventilation on the outside; moisture staining, mold, attic airflow, and decking condition on the inside.
This step gets skipped most often. A roof can look acceptable from the driveway while the plywood underneath has been quietly softening around an old leak for years. A satellite photo and computer-generated measurement can't feel a soft spot underfoot. Walking the actual roof and stepping into the attic is the only way to know what you're dealing with.
Step 2: Choose the System, Not Just the Shingle
Shingles are the visible surface of a larger water-management system. Below and around them are layers most homeowners never think about: underlayment, drip edge, flashing, starter shingles, ridge materials, and ventilation components. Each one has a specific job in keeping water moving off the roof and away from the structure.
For most South Jersey homes, architectural shingles are the practical choice over the older three-tab style:
| Architectural | Three-Tab | |
| Profile | Dimensional | Flat |
| Wind rating | ~110–130 mph | ~60–70 mph |
| Estimated service life | 25–30 years | Shorter |
(Wind and lifespan figures vary by manufacturer. Verify against current product data. Service life is an estimate, not a guarantee.)
Choosing the wrong underlayment or skipping proper flashing will undermine even the best shingle. For a look at completed projects across shingle types, the Bibbo Builders roofing gallery shows real South Jersey work from start to finish.
Step 3: Lock Down the Scope Before Work Begins
A good estimate is a blueprint of the full scope of the roof replacement job. A low price without a clear description of the work can mean skipped steps: deck repairs, proper underlayment, disposal, drip edge, ventilation upgrades, full cleanup.
Before signing anything, get clear answers on:
- Tear-off versus overlay: is the existing roof coming completely off?
- How will damaged decking be identified, priced, and approved?
- What is the disposal plan, and who handles dumpster placement and removal?
- Are permits required?
New Jersey planning flags to confirm before work begins:
- New Jersey generally allows no more than two layers of asphalt shingles. A third layer requires a full tear-off.
- Replacing more than 25% of roof deck or wall sheathing may trigger permit requirements depending on your municipality.
- Registered New Jersey contractors carry a Home Improvement Contractor license number beginning with "13VH". It takes ten seconds to ask for it.
(Confirm permit requirements with your local municipal construction office. Requirements vary by scope, property type, and town.)
Step 4: Protect the Property Before Anything Comes Off
Before a single shingle gets pulled, thorough setup includes covering windows and doors in the tear-off zone, protecting siding, landscaping, and outdoor furniture, planning dumpster placement to minimize driveway and lawn damage, and moving any fixtures that need temporary relocation.
One of the most consistent things homeowners notice after a well-run roof job is that the property looks exactly as it did before. That outcome requires deliberate attention before work starts, not an afterthought once the dumpster is gone.
Step 5: Full Tear-Off vs. Overlay
An overlay keeps the existing roofing in place and installs new shingles on top. It costs less upfront, but it prevents the crew from seeing what's actually supporting the new shingles you're paying for.
A full tear-off exposes the deck completely. That's when you find out whether the plywood is sound, whether water has been sitting on the structure, and whether sections need replacement before new materials go on.
Step 6: Deck Repair and Waterproof Layers
For homes built in the 1950s and 1960s, original roof sheathing may have held up well, or it may have absorbed decades of moisture around an old penetration and gone soft. There's no way to confirm condition without pulling the old layers off.
When compromised sections are found, they get replaced before anything else goes on. This is what turns a shingle job into an actual roof replacement. The sequence after deck repairs:
- Deck prep: swept clean, soft or deteriorated plywood replaced
- Underlayment: a water-resistant layer fastened across the full deck
- Ice-and-water protection: applied at eaves, valleys, and around penetrations
- Drip edge: metal edging at rakes and eaves to direct water into gutters
- Flashing: metal and membrane details at all transitions, chimneys, skylights, and vent pipes
Installing shingles over a compromised deck is like laying new flooring over a rotted subfloor. Before work begins, ask your contractor how hidden wood repairs will be documented, priced, and approved. A clear answer upfront prevents a surprise change-order mid-job.
Step 7: Install in the Right Order
Shingle installation follows a specific sequence because each layer overlaps and protects the one beneath it:
- Starter course: seals the bottom edge and prevents wind uplift on the first shingle course
- Field shingles: full courses installed in overlapping rows up the roof
- Valleys: where two roof planes meet, water concentrates, so this detail gets specific attention
- Penetrations and pipe boots: rubber or metal boots seal around vent pipes
- Wall and chimney flashing: metal integrated with shingle courses to direct water away from vertical intersections
- Ridge cap: a manufactured cap shingle finishes the peak and seals the highest point
Flashing directs rainwater at every chimney, skylight, valley, and vent pipe. When it's done wrong or skipped, those are precisely where leaks develop, sometimes years after installation.
Step 8: Ventilation, Gutters, and Cleanup
Ventilation belongs in the conversation at the start. South Jersey attics can reach around 150°F in summer. That heat accelerates shingle aging from the underside and drives cooling costs up. Trapped moisture leads to condensation, mold, and wood rot. Balanced intake and exhaust ventilation, typically soffit vents for intake and ridge vents for exhaust, keeps the attic stable year-round.
Gutters need to be clear and draining properly when the crew leaves. Debris from tear-off should be cleaned out before the job is considered complete. If your gutters are aging alongside the roof, it's worth addressing them at the same time. See Bibbo's gutter installation service for what that involves.
The homeowner's final walkthrough checklist:
- Flowerbeds, lawn, and shrubs left intact; moved items returned to their spots
- Gutters and downspouts cleared of tear-off debris
- Driveway and yard swept with a magnet for stray nails
- A plain-language conversation about what was found, replaced, and installed
How to Judge the Job and the Contractor
Ask Process Questions, Not Brand Questions
Instead of leading with "Do you install GAF or CertainTeed?" ask questions that reveal how a contractor actually works:
- "Will you inspect the attic before you quote me?"
- "How do you handle damaged plywood? Can I see that documented before you order materials?"
- "Who is on-site making decisions during the job?"
Two estimates can show nearly identical totals and represent completely different scopes. One contractor includes deck inspection and replacement of deteriorated sections as standard. Another quotes new shingles and leaves the rest as a potential add-on.
The written scope reveals the difference between a pro and a novice roofer.
Low Overhead Isn't Low Quality
"They did a great job on the roof. Were very respectful of my property and came in at way way under what some others did to do the same job."
An owner-operated contractor with no sales team and no management layers naturally carries lower overhead than a large regional company. That shows up in the quote. It doesn't reflect the quality of the work. The scope and references tell you whether a lower price reflects lean operations or skipped line items.
What a complete roof replacement delivers at the end:
- A written scope with clear material and product details
- Warranty and workmanship information in writing
- Permit or inspection documentation when applicable
- Photos of any hidden repairs made during the job
- Plain-English guidance on maintenance and what to watch for going forward
For a broader look at how South Jersey homeowners evaluate their projects, the Bibbo Builders reviews page covers over 380 completed jobs.
How Bibbo Builders Works
Bibbo Builders has served Camden, Burlington, and Gloucester counties since 1978. Joe Bibbo handles every estimate himself, walks the roof and the attic before quoting, and is on-site for every job. Deck and water-control details are treated as the actual work, not background conditions to work around.
The A+ BBB rating and 5.0 stars across hundreds of reviews reflect that track record. Our roofing photo gallery shows real South Jersey projects if you want to see the quality of our finished roof replacement work.
If your roof is nearing the end of its life or you have a leak you can't ignore, call Joe at (856) 354-1639 or request a free quote online.