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ROOFING INSPECTION & REPAIR
AMERICAN CEMWOOD ROOFING
BEST ROOFING PRACTICES
BUILT UP ROOFS
CATHEDRAL CEILING VENTILATION
CERTIFICATIONS for ROOFING CONTRACTORS
CHIMNEY FLASHING Mistakes & Leaks
COLD WEATHER ROOF TROUBLE
DECKS, ROOFTOP CONSTRUCTION
EPDM, RUBBER, PVC ROOFING
EXTRACTIVE BLEEDING on SHINGLES
FIRE RETARDANT PLYWOOD
FLASHING on BUILDINGS
FLAT ROOF MOISTURE & CONDENSATION
Green House or Solarium Roof Leaks
HEAT TAPES & CABLES on Roofs for Ice Dams
ICE DAM PREVENTION
MASONITE WOODRUF FIBERBOARD ROOFING
NOISE CONTROL for ROOFS
PLASTIC ROOFING TYPES
PVC, EPDM, RUBBER ROOFING
ROOF ARCHITECTURAL STYLES - PHOTO GUIDE
ROOF CLEANING RECOMMENDATIONS
ROOF COLOR RECOMMENDATIONS
ROOF INSPECTION SAFETY & LIMITS
ROOF LEAK DIAGNOSIS & REPAIR
ROOF NOISE TRANSMISSION
ROOF REPLACEMENT SNAFUs
ROOFING FELT UNDERLAYMENT REQUIREMENTS
ROOFING MATERIALS, Age, Types
SADDLE CONSTRUCTION at CHIMNEYS
SNOW GUARDS & SNOW BRAKES
STANDARDS for ROOFING
STRESS SKIN INSULATED PANELS
TEST LABS - ROOF SHINGLE
TREES & SHRUBS, TRIM OFF BUILDING
TRUSSES, Floor & Roof
UNDERLAYMENT REQUIREMENTS on ROOFS
VENTILATION in BUILDINGS
WALK-ON ROOF SURFACES
WARRANTIES for ROOF SHINGLES
WORKMANSHIP & ROOF DAMAGE
Curling asphalt shingle roofs: this article describes shingle curling as a sign of wear on asphalt shingle roofs and discusses how to identify & explain the most-common asphalt roof shingle failures. We illustrate different asphalt shingle curling patterns, types & causes, and we discuss how to decide if a curling-shingle roof can be repaired or if it needs replacement. We also illustrate early roof shingle failure on a 6-year old installation. Our page top photo shows shingle edge down-curling. Other photos on this page show shingle corner curling.
Green links show where you are. © Copyright 2013 InspectAPedia.com, All Rights Reserved. Author Daniel Friedman.
Question about early asphalt roof shingle failure:
I live in Wisconsin and had my roof replaced (total strip down) about 6 years ago. Now my shingles are curling up or fish mouthing. I do not know what you call it but it looks terrible . Can you help me out? A friend said to check on the internet for something with Owens Corning.
I believe they are 30 yr shingles. I do not have any of the paper work but when they put them on they said they only use premium shingles. Check out the rain gutter. It is 3/4 full of shingle fragments and granules. The rest of the roof shingles still look good. Any help would be great. - Louis Tolley, Adams WI
Answer and advice on diagnosing a failing fishmouthed shingle "new roof" job:
The roof shingle wear pattern in your photos is easily mistaken for "fishmouthing asphalt roof shingle" but what we see in your photos is not "fishmouthing" but rather shingle curling, combined with extreme granule loss.
Comparing Shingle Fishmouth Patterns with Shingle Curling Patterns
Fishmouthing asphalt shingles appear as an upwards curve in the center of shingle tabs, usually where the center of a fishmouthed shingle tab crosses over the shingle butt joints in the course below. See the fishmouth shingle photos above on this page.
Shingle tab curling, such as shown in your photos, occurs at the corners of shingle tabs, not in the center of the tab. See CURLING ASPHALT SHINGLES.
How old is This Roof Wear-Out?
Regardless, your roof photos show severe wear and curled shingle tabs that we see at the end of roof life - your photos of this worn roof slope show that every single shingle tab is curled up from a corner – that combined with the significant granule loss would be very unusual on a six-year-old roof. We comment further and provide some roof failure diagnostic questions just below.
From looking at the photographs, and recognizing that we are not looking at the entire roof, some comments and questions arise that should help sort out this "early roof failure" mystery:
Six-Year-Old Roof Shingle Failure Diagnostic Questions
Watch out: First off - don't fall off the roof while you are up there looking around.
Don't walk on these fragile, damaged asphalt shingles - they'll break and leak.
Go back to look at your information on your 6 year old re-roof job with the questions listed below. If you have no records and no documentation of who did the roof, what was the contracted scope of work (all slopes or just some) we can still figure this out by inspection of the whole building.
Usually when we have inspected early roof failure cases like this it turns out that there was a misunderstanding (or less often, dishonesty) - the roofer did not re-shingle all slopes, maybe just one of them, but the owner thought they all were being done.
Frequently Asked Questions (FAQs) about curling asphalt roof shingles
Question: How do I know if the contractor screwed up or if I got defective shingles?
I have the same problem as the one in this article. When it rains there are tons of black granules and there are lots of curled shingles. I peeled the old shingles off before the contractor came in and replaced my shingles. My contractor told me that the new shingles were 30 year shingles. How do I know if the contractor screwed up or if I got defective shingles. The roof doesn't leak but I want to fix it before anything happens. What should I do next ? - email@example.com 8/27/11
Reply: you should not see curled shingles on a new roof. Some granule loss on new shingles is normal, due to foot traffic during installation, but not any bald areas.
Question: The real estate agent on this property said they had the roofer that did their house examine the issue in question and said the roof has "a good 5 more years of life
We are looking at a property in the Northwoods. On the southern sun exposed slope over the garage and shop, the shingles are curling badly. The real estate agent on this property said they had the roofer that did their house examine the issue in question and said the roof has "a good 5 more years of life" What potential effects could occur by leaving this issue unresolved in the next 5 years? Would it be prudent to insist the current owner "cure or fix up" the problem or allow some credit on the purchase price? - Ned Bandy, Wausau, Wisconsin 9/28/11
Reply: caveat emptor
Ned, it's a legal standard in real estate purchases that a buyer should obtain his/her own independent expert to assess the condition of property including assessing remaining roof life. Like the seller, a real estate agent has a conflict of interest and in court if you were arguing that you'd relied on the realtor, most likely the judge would say that in real estate where conflicting interests are well understood, caveat emptor.
Question: Our new roof, two weeks old, is curling & warping - could cold weather installation be at fault?
Just got a new roof this year, (less than 2 weeks ago) and it is curling and warping? It is cold here right now and I understand it is better to put a roof on in warmer weather but could this be the culprit? I haven't received the final bill yet and don't want to pay up or accept any excuses without at least understanding if there may be some issue other than the install to blame. - Jules 1/25/12
Jules, new shingles certainly should be flat, not curling; weather or temperature independent; Send me some photos if you can and I can comment further - use the contact link found on our pages.
Question: the shingles are curling on our 12-year old home
The [last 2] photos (left) look just like our issue. The home is only 12 years old and in the last two developed this problem. AWFUL!!! We have had an inspection and they are saying it is an organic shingle......a builders special!!
It's only on the south side of the house while the rest looks good. It was indicated that heat is likely the source for this both exterior and interior. We are getting estimates to replace and the numbers aren't pretty!! Can a shingle issue like this allow condensation to the attic area? - Bob 4/29/12
Curled shingles can suggest a product defect
What is unusual in our curling shingle photo above is that at first glance it looks like fishmouthing but I don't think so. Notice that every shingle corner is curled up - that's not how fishmouthed shingles show curling. (FISHMOUTHING ASPHALT SHINGLES) We haven't seen your roof, but for the one illustrated just above, that observation, combined with extensive granule loss on what was reported to be a 6-year-old roof suggests a product defect problem.
Questions & answers or comments about curling asphalt roof shingles: causes & cures.
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