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Roof repair warning signs

** Note: These warning signs do not mean you will need a new roof. Although ALL of these warning signs will eventually lead to water integration if not fixed, repaired or replacing the problem areas. The list below are exterior signs but some interior warning signs would be a leaking attic, blistering / peeling paint or ceiling stains and/or mold growth.

Call a Professional at TDC Roofing to assess your situation and provide suggestions and solutions on how to maintain a solid roofing system.


Broken Shingles

Damage can be caused by extreme wind conditions and snow removal. Since shingles are supposed to shed water, broken, torn or missing tabs become obvious entry points for water, especially on low slope roofs where run-off is slower and at the peaks of the roof where shingles are the most vulnerable to high winds.



The upward curling of shingle tabs makes them highly susceptible to wind and ice damage. this is a problem on older roofs where moisture build-up in the attic affects the underside of the shingle.



Buckling is a visual distortion or waviness in the horizontal lines of shingles, and usually runs in a straight line up the roof slope. Shingle tabs become exposed to wind and can be torn off.

Very often, the problem is warping in the roof deck caused by poor attic ventilation. The use of thinner than recommended plywoods and other non-plywood materials adds to the problem



This is the curling under of the shingle tab's bottom edge and is part of the normal aging process of shingles. The bulge created is susceptible to substantial damage by wind action, hail and ice.


Many problems occur at the flashings around vents, soil stacks, chimneys and vertical wall joints.

Is the flashing cracked?
Is the caulking around the flashing dried out?
Are the shingles that lie over the flashing in good shape?


Blistering can be caused by two different scenarios. One, is that moisture was trapped in the shingle during the manufacturing process. Once heated from the sun, the trapped moisture will rise up on the shingle. The second cause is due to improper ventilation. When the shingles get too hot from the intense heat of the sun, it will cause the shingles to blister.


Wind Damage

Installation of shingles should be flat and flush with each other. High winds can cause shingles to lift and even tear away from the nails. This exposed area needs to be fixed, otherwise leaking is inevitable.

Hail Damage

Hail damage can leave punctures or bruising on your shingles. Once the granules are lost, it creates a weak spot that will eventually cause leaking unless fixed. The granules are on the asphalt shingle to protect it from the UV rays of the sun. If the asphalt is exposed from hail, this will cause the deterioration of the shingle much faster. This can lead to a reduction on the shingles water-shedding ability and the expected service life.


Pigeon Prevention

Pigeons can cause a great amount of damage, if not taken care of quickly. Did you know certain types of pigeons can produce 1 ½ pounds of fecal matter a day! Bird droppings can definitely degrade the quality of your asphalt shingles and cause mildew fast. See the following link for humane ways to get rid of your pigeons.

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