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10-Point Roof Inspection

Hip and Ridge

A roof’s ridgeline often shows wear prior to other parts of the roof. Shingle ridge caps are folded over the ridge during construction, which stresses the mat (underlying material of the shingle). Also, since the shingle is folded, more of the mat is exposed to the environment, which may accelerate deterioration. Ridge material is more susceptible to normal weather over time, and is more likely to be damaged by wind and hail. If the ridge material starts to soften, crack and show significant granule loss or damage, it is a sign that roof replacement may be necessary.


Valleys also show wear earlier than other components of a roof. Shingles are folded into the valley during construction, which stresses the mat. Also, drainage flows in the valleys are heavier and faster than drainage from the slopes. Because of this, valleys are likely to lose more granules over time, which may accelerate deterioration. Valleys are more susceptible to normal weather, and are more likely to be damaged by wind and hail. If the valley material starts to soften, crack and show significant granule loss or damage, it is a sign that roof replacement may be necessary.


Field damage is what most insurance companies look for when evaluating a roof for replacement. Since normal environmental factors are less likely to damage the field, damage is more likely to occur from storms, such as wind or hail. Insurance companies generally look for six to ten hail hits per 100 square feet, or wind damage that is not repairable. Excessive attic heat caused by lack of appropriate ventilation also may accelerate field deterioration.


For the most part decking can be evaluated on a shingle roof prior to the shingles being removed. Decking damage generally occurs in typical trouble areas, such as high water flow valleys, and where one roof drains onto another roof, where there is a higher potential for small leaks over time. Damage to decking can also be caused by moisture and excessive heat in your attic If we feel that there may be decking issues, we will examine the decking closer when we remove the underlayment to replace your roof.


Lack of appropriate ventilation may cause attic areas to become very hot, and may bake a shingle from underneath, causing it to deteriorate more quickly than normal. Our inspection includes an evaluation of your roof’s ventilation system. Generally when a home is built, it is designed with a particular ventilation system in mind. If you do not have adequate ventilation, it is generally best to make additions to your current system, rather that changing the ventilation system altogether (i.e. cut in additional vents similar to the existing vent rather than changing from turtle attic vents to ridge vent).

Plumbing Stacks, and Other Flashings

Plumbing stacks and the flashings surrounding them are always potential trouble areas. Vents and vent flashings are easily damaged by hail, and plumbing stack flashings tend to degrade over time. It is important to ensure that these items were properly installed and sealed, and that any damage that may have occurred since installation is addressed immediately.

Step and Wall Flashings

Step and wall flashings are the metal pieces that line the areas where walls penetrate into the roof. Flashings are always potential trouble areas. If properly installed, they are nested up under siding, and are installed along with the roofing material in a particular way so as to prevent leaking. We have observed that many roofing companies take shortcuts with step and wall flashings that may lead to potential leaks. Our inspection includes an assessment of the installation and condition of these flashings.

Drip edge

Drip edge is a metal flashing that is attached to the perimeter of a roof, and causes water to drip away from the fascia. The most common problem with drip edge is that along eaves, where it runs into gutters, it is too small to properly attach to the eave. Often local building code does not require drip edge of sufficient size, or may not require it at all. Many roofing companies apply drip edge only to code, and as a result long term problems may arise.


Fascia are the vertical boards which cap the perimeter of a roof and are used to hold the gutters. If not properly protected by drip edge, water may run over the fascia, causing an increased likelihood of rotting. Fascia may eventually detach from the rake and eaves, and leakage may result. We will closely inspect the fascia to determine if there are any trouble spots, and inform you of the necessary course of action. Generally any issues can be addressed by adding drip edge.


Over time gutters may rust or crack, and may leak water down wall faces and can cause pooling along the foundation of your property. We will inspect your gutters, and let you know if you have any potential issues. Keep in mind that gutters are not easily damaged by wind and hail. If your gutters are intact and functioning appropriately, we generally recommend that they not be replaced.

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