Roof Tear-Off Surprises Homeowners Should Be Prepared For
What We Commonly Discover Once the Shingles Come Off in Charleston, SC
Most homeowners only see the finished roof. What they don’t see is what’s underneath — and that’s where many of the biggest (and most expensive) roofing problems hide.
At New Beginnings Construction, we frequently uncover critical issues during roof tear-offs across Summerville, Charleston, Mount Pleasant, West Ashley, James Island, and Johns Island. These discoveries can affect the scope of work, timeline, and—on insurance projects—the claim payout.
Being prepared for these possibilities helps reduce stress and avoid surprises.
Why Roof Tear-Offs Reveal So Many Problems
A roof can look “fine” from the ground and still be failing underneath. Shingles are only one part of a roofing system. Once they’re removed, we can finally inspect the components that actually protect your home from water, heat, and wind.
1️⃣ Missing or Insufficient Ice & Water Shield
Ice & water shield is one of the most critical protections on a roof — even in coastal South Carolina.
We often find:
- No ice & water shield at all
- Coverage limited to valleys only
- Missing protection at eaves, roof-to-wall areas, and penetrations
Why it matters
Ice & water shield protects against wind-driven rain, which is common during tropical storms and hurricanes. Without it, water can back up under shingles and reach the decking.
Many manufacturers require ice & water shield in specific areas for warranty eligibility. New Beginnings Construction installs in all valleys, around all prentrations, and the flashing at all roof-to-wall transitions. This is building beyond what manufacture and code requires, but its the right thing to do.
2️⃣ Improper or Deteriorated Underlayment
Underlayment is the last line of defense beneath shingles. During tear-off, we often discover:
- Old felt paper that’s torn or brittle
- Underlayment reused from a previous roof
- Gaps, wrinkles, or reverse laps that funnel water inward
Why it matters
When underlayment fails, even a small shingle issue can turn into a leak. Reusing or improperly installing underlayment puts the entire roofing system at risk. We install synthetic felt paper, think of a thick tarp-like material for your roof.
Additionally we are required to install double layers throughout the entire roof, due to high wind zone requirements for the Summerville, Charleston, Mount Pleasant, West Ashley, James Island, and Johns Island areas.
3️⃣ Damaged Sheathing & Roof Decking
This is one of the most common — and most misunderstood — tear-off discoveries.
We frequently find:
- Rotten or delaminated OSB or plywood
- Soft decking around vents, chimneys, or valleys
- Long-term moisture damage with no interior signs
- Gaps larger the 1/8 of an inch between decking boards
- Knots missing in dimensional lumber decking boards
- Roofs installed 2 -3 times on the same roof sheathing, creating too many roofing nail holes to be installed over again.
Why it matters
Shingles cannot be installed over compromised decking. Doing so:
- Violates code
- Voids manufacturer warranties
- Creates uneven nailing surfaces
- Leads to premature roof failure
Damaged decking must be replaced to properly restore the roof.
4️⃣ Improper Roof Ventilation
Ventilation issues are almost always hidden until tear-off.
Common problems include:
- No balanced intake and exhaust
- Blocked soffit vents
- Exhaust vents placed incorrectly
- Too few vents for the roof size
- Roofs with old, dated vents, like the “whirly bird” turbine vents
Why it matters
Poor ventilation traps heat and moisture, which:
- Shortens shingle lifespan
- Causes decking deterioration from below
- Increases attic moisture and mold risk
- Leads to higher energy bills
Many manufacturers require proper ventilation for warranty coverage. Having improper ventaliation can void the warranty on certain roofing systems.
5️⃣ Previous Installer Skipped Manufacturer Requirements
Not all roof failures are caused by age or storms — many are caused by shortcuts.
We often uncover:
- Missing starter strips
- Three-tab shingles cut and used in luau of starter strips, or hip & ridge shigles
- Incorrect underlayment layering
- Improper valley systems
- Incompatible materials used together
Why it matters
Even premium shingles will fail early if installed incorrectly. Manufacturer requirements aren’t suggestions — they’re conditions for performance and warranty protection.
Most Shingles manufactures have a complete roofing system that needs to be installed for the roofing manufacture warranty to take effect. This is crucial that all manufacture components are used to ensure proper coverage.
6️⃣ Improper or Reused Flashing
Flashing is one of the most common failure points on any roof.
During tear-off, we often find:
- Old damaged flashing reused instead of replaced
- Incorrect flashing at chimneys or walls
- Caulking used instead of proper metal flashing
- Improper or missing flashing install around brick or stucco chimneys, and where roofs terminate in the side of exterior walls
Why it matters
Flashing directs water away from vulnerable areas. When it fails, is installed improperly or not at all, leaks often appear far from the actual problem — making them difficult and expensive to trace.
7️⃣ Not Installed Up to Current Building Code
Roofing codes evolve — especially in coastal and high-wind zones like Charleston.
We frequently discover:
- Roofs installed under outdated codes
- Missing high-wind fastening requirements
- Improper decking attachment
Why it matters
When a roof is replaced, it typically must meet current building code — not the code in place when the home was built. This can affect scope, materials, and inspections. Making sure your contractor is local, and knows the requirements of our coastal codes and ordinances, and docuements every step of the way, will help ensure the replacement will stand up to code requirements.
8️⃣ Improper Nailing Patterns
This is a hidden issue homeowners never see — but it’s incredibly common.
We often find:
- Under-nailed shingles
- Over-driven nails
- Nails placed outside manufacturer-approved zones
Why it matters
Improper nailing reduces wind resistance and can cause shingles to lift, slide, or blow off during storms — even if the shingles are new. Our local code in high windzone areas require 6 nails per shingle, where as manufacturer requires 4 nails per shingle. This is a no brainer for any local roofing contractor you talk to, and must be adheared to.
What This Means for Insurance Roofing Projects
If your roof replacement is tied to an insurance claim, many of these issues aren’t visible during the initial inspection.
When tear-off reveals:
- Missing ice & water shield
- Damaged decking
- Code-required upgrades
- Improper prior installation
…the scope of work must be updated.
How This Affects the Insurance Payout
- Additional documentation is required
- Supplements may be submitted
- Claim reviews can take additional time
- The final payout may increase to reflect necessary repairs
This process protects homeowners from paying out of pocket for hidden damage and ensures the roof is restored correctly — not just cosmetically.
The Bottom Line for Homeowners
Roof tear-offs often reveal issues that:
- Couldn’t be seen beforehand
- Affect long-term performance
- Impact warranties and insurance claims
Being prepared for these discoveries helps avoid frustration and ensures the job is done right the first time.
Why Charleston Homeowners Trust New Beginnings Construction
We don’t cut corners or cover problems up. When we find issues during tear-off, we:
- Document everything clearly
- Communicate transparently with homeowners
- Follow manufacturer and code requirements
- Advocate for proper restoration on insurance projects
While we try to identify potential issues, and do a through discovery inspection of your home, SOme things are discovered during the tear off and inspection process. Our goal is a roof that performs for the life of your roof — not just one that looks good.
Frequently Asked Questions (FAQ)
Why does my roofing scope change after tear-off?
Because hidden components like decking, underlayment, and flashing can only be inspected once shingles are removed.
Is ice & water shield required in Charleston?
While not required everywhere, it is strongly recommended and often required by manufacturers in vulnerable areas like eaves, valleys, and roof-to-wall transitions.
Will insurance pay for damaged decking?
While long term water damge can be tough to get covered by insurance, If the damage is related to the covered loss and properly documented, it is often eligible for coverage — though it may require a supplement and an experienced team that can prove it is covered by being an “un-nailable surface” and shingles can’t be secured to an un-nailable surface.
Can a contractor install shingles over damaged decking?
No. That would violate code and manufacturer requirements and could void warranties.
Can a contractor install shingles over damaged decking?
No. That would violate code and manufacturer requirements and could void warranties.
Can a contractor install new plywood over the existing decking?
Yes. Installing new plywood over existing roof decking is called a deck-over, and in some cases it can be more practical than removing all existing sheathing. However, the structure must be evaluated to ensure it can handle the additional weight — especially on older or manufactured homes. A structural engineer should verify load capacity if there is any uncertainty.
Why does ventilation matter so much?
Proper ventilation protects shingles, decking, energy efficiency, and indoor air quality — and is often required for warranty compliance.
👉 Planning a roof replacement or dealing with an insurance claim?
Contact New Beginnings Construction to make sure your roof is rebuilt the right way — from the decking up.
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