Ridge & Hip Cap Shingles. Installation, inspection, & failure diagnosis at roof ridges & hips. RIDGE & HIP CAP SHINGLES - CONTENTS: how to install, inspect & diagnose types of failure or wear at roof hip or ridge cap shingles. Nailing errors, excessive bending at the ridge or hip, cold weather shingle bending, failiure to seal, and facing the hip or ridge shingles into the wind are shingle failiures discussed here. Installation, inspection, & failure diagnosis at roof ridges & hips. POST a QUESTION or READ FAQs about early or premature roof shingle leaks, wear, or failures.

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REFERENCESInspect. APedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website. Ridge & hip roof cap shingles: This article describes the installation of ridge and hip cap shingles and discusses the probable causes of early failures on ridge and hip shingles on asphalt shingle roofs when they fail in advance of other roof areas.

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The most common failure at the ridge or hip covering of most roofs, regardless of roofing material, is wind damage and blow- offs due to inadequate nailing. But on occasion, such as in our photo above, we see remarkable wear in the form of granule loss, cupping, or curling at the ridge that has not appeared elsewhere on the roof.

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Here we discuss why this wear happens and what to do about it. This roof failure diagnosis article series investigates types and causes of premature or early roof wear or failures. We describe shingle granule loss shingle curling as a sign of wear on asphalt shingle roofs and discusses. Our page top photo shows shingle edge down- curling. Other photos on this page show shingle corner curling. Green links show where you are. While this is an old, worn- out roof (on an entry to the Kingston NY library), it may be meaningful that at end of life the ridge cap shingles failed in the pattern seen there: bending stress over the ridge may have ultimately stressed the ridge cap shingles so that they broke at the ridge apex.?

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I’d like to understand why the ridge shingles only, deteriorated. I was told that this was a Presidential composition asphalt shingle roof about 1. Do you know any roofers that have seen this condition? The House Whisperer.

Reply: These Ridge Cap Shingles are from a different shingle model, batch, and possibly brand than the singles used on the body of the roof. A competent onsite inspection by a roofing expert usually finds additional clues that help accurately diagnose a roof or other building problem. But sometimes even experienced roofers and home inspectors as well as home owners can be left baffled by roofing failure patterns. Nevertheless I am convinced that if we could know enough (or maybe know everything) about any given roof failure condition we would never ascribe the failure to random chance and we could indeed explain what's going on. In this case we can make a pretty reasonable guess at why your ridge cap shingles look so different, and so worn, compared with the shingles on the main body or field of the roof. How To Install Skunk2 Universal Muffler Hangers on this page.

First let's look at the shingles on the body of the roof. The pattern and style of shingles used on the main body or field of the roof in your photos look somewhat but NOT exactly like a laminate- type shingle or at least a style that mimics laminate type shingles. So I'm not sure if the roof shown (above left) is Presidential Shake. I can guess at several explanations: These ridge cap shingles may not be the same material, batch, and model as the field shingles on the rest of the roof and they may have been stored improperly. The roofer would have either bought special ridge cap shingles or more commonly the roofer would make the needed ridge cap covering by trimming and cutting asphalt shingles from whatever was at hand, sometimes even a different batch of conventional 3- tab roofing shingles.

If s/he used whatever was at hand that seemed close in color to the field of the roof, it's plausible that a less costly (and less durable) model of roof shingle was selected to make the ridge cap. A close look at your ridge cap shingle photo suggests that even the cap shingles may have been cut from laminated shingle material. I think I see multiple shingle edges in view. On occasion too I've found roofers taking the expedient course of . Depending on how old these leftovers were, and more importantly, where and under what conditions they were stored, they might well fail quickly when installed on a roof.

Believe it or not, asphalt shingles not yet installed on a roof should be stored in a cool, dry place, out of direct sunlight. You can read this advice on shingle packaging and in installation manuals.

In sum, it looks to me as if the ridge cap shingles may have been a different, and inferior product to the shingles used on the rest of the roof. And worse, they may also have been stored or handled improperly. While we could observe that there also seems to be no ridge vent on this roof, and while heat, moisture from below, and lack of adequate ventilation are important factors in shingle wear, curling, and even granule loss, the product difference and possibly product storage and age conditions are the most likely explanation of their early failure.

How to Distinguish Among Ridge/Hip Cap Shingle Failure due to Cracking, Excessive Bending, Poor Nailing, Thermal Splitting, Wind Damage, or Other Wear. Glenn added about the premature ridge cap shingle failure photo shown above that a roofer suggested that this shingle failure at the ridge was due to cracks where the shingles were bent over the ridge, and more serious because the ridge cap shingles were laminates, thicker, more likely to crack when bent. Certainly bending shingles, particularly cold shingles, over a steep slope ridge can stress and break the shingles. Cracking shingles show just that - cracks. Indeed once the shingle has cracked the shingle substrate absorbs increasing amounts of water and in a freezing climate the freeze- thaw cycle will accelerate wear of the shingle.

There are several types of shingle cracking that occur: defective product or thermal splitting (CRACKS in FIBERGLASS SHINGLES), cracks due to cold or excessive bending at a hip or ridge, cracks due to excessive roof or structural movement, and cracking that appears as part of normal asphalt shingle wearing and age. But in premature shingle failure conditions, that is, not normal aging, once cracking has occurred, the shingle wear is non- uniform, appearing first more severely around the cracks.

The page top photo shows uniform cupping and swelling of the shingle material - a different problem. Finally, when asphalt shingles crack due to being bent too acutely over a ridge, or being bent in cold weather, the crack that appears runs parallel to the ridge line - a pattern also not visible in the shingle failure shown at the start of this article. Concluding OPINION about the ridge cap shingle failure photo shown at the start of this article. We agree that often cracks at the ridge cap shingles lead to their wear, more so if the shingle was thick and hard to bend, and still more so if the shingle was bent in cold weather or under cold conditions rather than allowing it to heat up first. And Certainteed as well as other roofing shingle manufactures warn about proper bending (with heat) to avoid cracked ridge cap shingles and rake edge shingles.

But in the case of the bald, curling ridge cap shingles above, the wear is not showing up as a shingle crack failure as much as curling and granule loss that extends across the entire cap, on both sides, and along all of the shingles along the ridge. On roofs I installed or later inspected, cracking due to bending tends to be inconsistent - not the same on all cap shingles. And because water penetrates at the crack in the shingle, wear at a shingle crack tends to originate at and spread out from the crack.