How to spot hidden installation errors before paying for a new roof
Catching minor mistakes like missed nails or improper flashing early is critical because visible flaws usually indicate deeper, hidden installation failures elsewhere. Without catching these issues before final payment, homeowners are left dealing with chemical incompatibilities, leaks, and costly repairs that the original crew should have fixed.
Core Friction Pattern
Analysis of 14 peer accounts across online developer and community forums reveals that “How to spot hidden installation errors before paying for a new roof” repeatedly surfaces due to edge-case mismatches between standard defaults and real-world environments. Standard troubleshooting frequently falls short, compelling practitioners to develop custom workarounds.
+15 alternative community-tested workarounds cataloged below.
What the numbers show
Counted from the threads quoted below. How we count
- People have been saying this in most months since September 2026.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
How to spot hidden installation errors before paying for a new roof
- 1Call the contractor back out to repair or replace the affected shingles.Did this help you?
- 2Cutting out and removing the incompatible material, then installing new EPDM and cover tape.Did this help you?
- 3Calling the contractor back to inspect and fix the workDid this help you?
- 4Buying tools like staple guns to secure decking personally during buildsDid this help you?
- 5fixing the issue from below with wood strips and screwsDid this help you?
- 6monitoring the roof over the years for cracks and damageDid this help you?
- 7talking to the installation crew or calling an inspectorDid this help you?
- 8Posting photos of the completed roof to online communities to ask professionals to spot errors.Did this help you?
- 9Asking online communities if the work is acceptableDid this help you?
- 10Having the contractor swap out the affected shingles immediately before they sealDid this help you?
- 11Posting photos of the completed work to online forums to get a second opinion from other professionals.Did this help you?
- 12Looking for visible red flags like exposed nail heads, unsealed holes, or inappropriately bent shingles.Did this help you?
- 13Posting photos provided by the contractor to online forums for experts to review.Did this help you?
- 14Having the roofing company patch the holes from the inside.Did this help you?
- 15Asking the contractors to return and do minor tweaks.Did this help you?
- 16Posting photos of the completed roof on forums to ask experienced roofers for a visual inspection.Did this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“Don’t hold any punches. I need to know if this is my fault.”source ↗
“Raised shingles due to lifted sheathing. Noticed this August 2026.”source ↗
“Anything look odd to anyone?”source ↗
“I found a few shingles with nails that missed the mark. Whats the best move here?”source ↗
“Is it time to have the contractor back out? Our roof is about 6 months old. This morning I noticed these linear bubbles on the north facing section of the roof. What are they? Thanks!”source ↗
“I recently had a new roof installed and had a question regarding the shingle installation on the gambrel transition.”source ↗
“It appears that they used nails the entire way across so that the shingles lay flat. Is this an acceptable way of doing things, or will it cause future problems?”source ↗
“Should I be concerned about this flashing that was done over the cover tape on a EDPM roof?”source ↗
“There was a small leak where the cover tape did not adhere and the roofer decided to add an additional step of Karnak / fiberglass tape / Karnak over the edge”source ↗
“Wanted to get feedback from the community, our roof got subbed out after we found a contractor that was certified by our solar company. Let me know what you guys think.”source ↗
“I am realizing that $1k Menards rebate I received could turn into a very expensive mistake.”source ↗
“have them come out and repair (which is replace single)- if you have two shiners - you have more you are not seeing. . . .”source ↗
“Brand new roof. Noticed this at bottom of a shingle . Presumably covering a nail. Not sure if a couple of these are considered acceptable for a new roof or not.”source ↗
“I don’t know much about roofing but I want to verify they did it correctly.”source ↗
“Karnak 19 is an asphalt based product, which is chemically incompatible with EPDM. It will eat through the existing EPDM”source ↗
“Everywhere that got Karnak on it will need to be cut out and removed, then new EPDM and cover tape installed”source ↗
“Just had a new roof replacement in the uk and been up into the loft to see it for the first time. Previously there was a felt underneath whereas now it’s a different material as seen in the photos. I’ve noticed 2 small holes in it also such as the one pictured. Would this usually be acceptable or worth getting the roofing company back in?”source ↗
“That is not looking bad, I have had done mine last week and the inner felt liners folds were worse than this.”source ↗
“No mang. They saved a few bundles by not over lapping enough... I'm sure there's other failures for instructions”source ↗
Where this came up
People with this problem also raised
- 59How to tell if roof flashing is installed wrong
- 4Can I install siding, soffit, and fascia before roof shingles?
- 6Is a gap in roof sheathing at the ridge okay before shingling?
- 8How to install drip edge on an existing roof
- 7Roofers left mono roof top exposed without a cap
- 10Why is my new house roof made with cheap materials and visible beams?