New Construction Roof: What’s Normal vs. What’s a Defect

Your builder says the roof is done. The crew packed up, the shingles look clean from the street, and the final walkthrough is scheduled. But then you get up close — and something doesn’t look right.

A bump near the eave. Small patches on the ridge cap. Flashing that won’t lay flat even after months of hot weather and a contractor who keeps saying it’ll sort itself out.

Is this normal? Is it a defect? And how long do you have before your builder’s warranty expires?

For homeowners in California, Texas, Florida, and Illinois, getting a clear answer matters. This guide walks you through exactly what to inspect on a new construction roof — and what red flags to take seriously before your protection window closes.

Why New Construction Roofs Aren’t Always Perfect

Builder Timelines Create Quality Shortcuts

In new construction, roofing is typically subcontracted — and often to the crew that submitted the lowest bid. Builders prioritize speed: frame it, roof it, and move to the next lot. That pressure produces installation shortcuts that aren’t visible from the street but reveal themselves months later as leaks, lifted flashing, or bubbling shingles.

This doesn’t mean every new build roof is bad. But “new” does not automatically mean “correct.”

Why Defects Show Up After You Move In

Some roofing problems need time and weather exposure to surface. A drip edge installed with the wrong overlap may look fine on day one but lift noticeably after a few heat cycles. Improper underlayment sequencing won’t matter until the first significant rainstorm. Flashing problems around vents and valleys tend to show up 12 to 24 months into occupancy — right when many builder workmanship warranties are expiring.

The window to catch and fix these issues is narrow. That’s why inspecting early is critical.

5 Things to Inspect on Your New Construction Roof

1. Ridge Cap Shingles — Premium Detail, Not a Defect

If you see small shingle pieces near the peak of your roof, don’t panic. On high-profile ridge cap shingles, roofers sometimes place cut cap pieces over the final nail row instead of leaving exposed caulk. This is a premium installation method — it protects fastener heads from UV degradation and helps the ridge seal last longer.

What actually signals a problem: ridge caps that are misaligned, curling at the edges, or showing exposed nail heads without any protection. Those are signs of a rushed install, not a thoughtful one.

2. Drip Edge Flashing — The Most Common New Build Error

Drip edge is the metal flashing along your roof’s eaves and rakes. Its job is to direct water away from the fascia board and into your gutters. When it’s installed correctly, you never think about it. When it isn’t, water works its way under the shingles and begins rotting the roof deck and fascia over time.

The standard code requirement across California, Texas, Florida, and Illinois is clear: adjacent drip edge sections must overlap a minimum of 2 inches and be fastened with corrosion-resistant fasteners at no more than 12-inch intervals. A drip edge overlap of 5 or 6 inches that creates a visible hump is a workmanship error — not something heat will resolve. Learn more about drip edge flashing overlap problems and the water damage they lead to.

3. Roof Sheathing — What’s Underneath the Shingles

The sheathing (roof deck) is the wood base your shingles nail into. From the ground or an attic ladder, look for visible waves, soft sections, or uneven ridgelines. Bulging panels between rafters indicate improper spacing or moisture exposure during the build. These problems affect how long your shingles perform. Our post on new construction roof sheathing problems covers the most common issues homeowners discover after move-in.

4. Flashing at Penetrations and Valleys

Every pipe, exhaust vent, and roof valley is a potential entry point for water. Flashing at these locations should be tight, sealed, and layered in the correct sequence — under the underlayment at eaves, over the underlayment at rakes. Any visible gap, lifted edge, or daylight around a penetration deserves a closer look. Roof flashing installation mistakes are among the most common causes of new-roof leaks in California and Florida.

5. Ventilation and Underlayment

Check that ridge vents and soffit vents are present, unobstructed, and appropriately sized for your attic square footage. Poor ventilation in a Texas or Southern California summer pushes attic temperatures above 150°F — enough to accelerate shingle granule loss and void some manufacturer warranties.

Ask your builder for documentation on the underlayment product installed. It should be a code-approved product for your climate zone, not a generic felt product used to cut material costs.

The Drip Edge Problem — Why “Heat Will Fix It” Is a Red Flag

What the Building Code Actually Says

The IRC (International Residential Code) — adopted across California, Texas, Florida, and Illinois — requires drip edge sections to overlap no less than 2 inches. Florida goes further: the Florida Building Code mandates drip edge installation as a required component of wind-resistant roofing, with fastening schedules verified during inspection. Illinois follows the 2024 Illinois Building Code, which mirrors IRC flashing standards for new construction.

A drip edge with a 5 or 6 inch overlap that creates a bump and won’t seat flat is not a matter of the metal needing to “settle.” Sheet metal does not flatten under heat — it expands. In some cases, summer temperatures make a misaligned overlap more pronounced, not less. The fix is a physical correction: trim the overlap, refasten, and replace any shingle that buckled over it.

When to Push Back on Your Contractor

If your contractor’s response to a visible defect is a vague assurance, treat that as a red flag. Document the problem with dated photos from multiple angles. Reference the specific code requirement it may violate. Then send a formal written notice — not a text message — to create a paper trail that holds up if you need to escalate to a licensing board or file a warranty claim.

Most builder workmanship warranties cover roofing defects for one year. Some extend to two. Knowing what’s covered — and what gets a claim denied — before you file makes a significant difference. Review our guide on roofing warranty claims to understand your rights.

What to Do If Your New Roof Has Defects

Document Before You Call

Photograph every issue before contacting your builder or contractor. Use timestamps. Describe exact locations: “north eave, third drip edge section from the left corner” is actionable in a way that “near the garage” isn’t. If the defect potentially violates a building code, note the specific requirement.

Then send a written notice — email or certified letter — to the builder. Follow up in writing every time. Verbal conversations don’t create records.

Builder Warranty vs. Manufacturer Warranty

These are two separate protections and two separate claims processes. Your builder’s workmanship warranty covers installation errors — like improper drip edge overlap or mis-sequenced flashing. Your shingle manufacturer’s warranty covers product defects. A denial from one doesn’t close the door on the other.

If you believe you have a defect that the builder isn’t addressing, review your options carefully. Our post on what to do when your new roof fails walks through the escalation path in detail. Also review the signs of bad roof installation so you know exactly what to document before your warranty expires.

Why US Power Installs New Roofs Differently

Licensed Contractors and Premium Materials

US Power uses CSLB-licensed roofing contractors on every project. Every installation is held to California’s strict contractor standards — and the same level of accountability extends to our Texas, Florida, and Illinois jobs.

We install premium composition shingles, clay tile, and metal roofing from trusted brands. Before we sign off on any job, we walk through a thorough quality inspection of flashing, ridge caps, ventilation, and sheathing. That’s the same standard reflected in our new roof installation checklist.

Transparent Process, No Vague Answers

When our crews finish a job, we explain exactly what was installed, how it was fastened, and what the warranty covers. With 180+ five-star Google reviews, a Limited Lifetime Warranty on materials and workmanship, and a 3-6 week installation timeline, there’s no mystery about what you’re getting.

Transparent pricing with no hidden fees — and no contractor telling you that a visible problem will “work itself out.”

Solar-Ready Roofing — Build It Right the First Time

Why New Construction Is the Best Time to Plan for Solar

If you’re building a new home or replacing a roof on an existing one, right now is the lowest-cost moment to plan for solar. Adding panels to a roof with flashing defects or improper sheathing creates compounding problems — and some solar manufacturers will void their warranties if the underlying roof installation doesn’t meet their standards.

A solar-ready installation means the roof structure, sheathing, penetration points, and flashing are all optimized for panel mounting before the shingles go on. It eliminates the cost of retrofit penetrations and protects both your roofing and solar warranties from day one. Our guide on replacing your roof before adding solar explains exactly why getting the roof right first protects your solar investment for decades.

The Cost Advantage of Combining Both

Scheduling a roof installation and solar prep at the same time eliminates duplicate labor costs, reduces permitting complexity, and gets your energy savings started sooner. US Power installs solar-ready roofs designed to support panel mounting without compromising installation integrity — one crew, one timeline, one quality standard.

Make Sure Your New Roof Is Built to Last

A new construction roof should be the last thing you worry about when you move in. But “new” doesn’t automatically mean “done right.” Drip edge flashing that won’t lay flat, improper sheathing spacing, and missed flashing details show up on new builds regularly — across California, Texas, Florida, and Illinois.

Most defects are fixable if you catch them early. Inspect thoroughly, document everything, and don’t accept vague contractor excuses about problems resolving on their own. Your builder warranty is a limited window, and it closes faster than most homeowners expect.

If you want a professional second opinion on a new construction roof — or you’re planning a full installation and want it done right the first time — US Power offers free inspections with no obligation.

Frequently Asked Questions About New Construction Roofs

How do I know if my new roof was installed correctly?

Look for even shingle alignment, flat flashing with no visible humps or gaps, sealed penetrations around vents and pipes, and covered ridge cap fasteners. If anything looks uneven or raised, document it with dated photos and request a walkthrough with your contractor before the builder warranty expires.

Is a bumpy drip edge a code violation?

Potentially. Building codes across California, Texas, Florida, and Illinois require drip edge sections to overlap a minimum of 2 inches and lie flat. An overlap that’s too large — creating a visible hump — may not meet code and is a workmanship issue worth disputing in writing while your warranty is active.

What does ridge cap shingle patching mean?

Small shingle pieces placed over exposed nails at the roof peak are a premium finishing detail, not a defect. They protect final fasteners from UV exposure and moisture better than caulk alone. High-profile ridge cap shingles often include this as part of a quality installation.

How long does a builder’s roof warranty last?

Most new construction builder warranties cover roofing workmanship for one year. Some extend to two. Shingle manufacturer warranties are separate and typically run 25 to 50 years, or limited lifetime. Review both documents before closing on your home so you know exactly what each covers.

Can I install solar panels on my new construction roof?

Yes — and a new roof is the ideal time to plan for it. US Power installs solar-ready roofs designed to support panel mounting without compromising the roofing installation. Combining both during new construction saves on labor, permitting, and long-term energy costs.