AJ Wells Roofing Wind Damage in Jacksonville, FL
As a Florida resident, you are used to the frequency of thunderstorms, tornadoes, and hurricanes that pass through the area on a regular basis, generating high winds and causing damage to your roof and other exposed parts of your home. Evaluate whether or not you have wind damage to shingles. The information below focuses on the evaluation of wind damage to shingle. Feel free to contact us for any assistance when determining if you have wind damage to your roof.
Understanding Wind and Your Roof:
The walls and the roof of your property receive inward (positive) and outward pressure as a result of wind passing by your property. Positive pressure on your walls and roof generally do not cause damage. Outward pressures, often called negative, suction, or uplift pressures, occur in the following scenarios:
- Passes by a wall
- Passes away from a wall
- Passes over a shallow sloped roof
- Passes over the leeward slope of the roof
Positive and negative pressures are affected by wind speed and how the roof is oriented to the direction of the wind. For example, the singles on the edges of your roof are more prone to outward pressures than the shingles at the center of your roof slope. Thus, the initial meeting of the edge of your roof with the wind can cause more trouble than after the wind meets your roof and then rushes over it.
Your Shingle Roof’s Maximum Performance:
A shingle roof is designed to counter the pressures of wind by sealing the shingle to the shingle strip underneath it.Shingle asphalt sealant is used, creating a dashed line of asphalt sealant across the shingles, which is heated by the sun and the weight of the shingle. This heat bonds the shingle and the strip together.
The shingle strips are adhered to the roof deck with nails along the edges and usually at every third point. Thus, each strip usually has four nails for maximum wind resistance and overall performance of your roof (Note: Each shingle strip should be properly overlapping the one beneath. If done properly by your Jacksonville, FL roofing contractor, each nail should penetrate the shingle strip below it, adhering eight nails from each shingle strip to the roof deck.)
Three classes exist for shingle wind resistance, but test methods do not account for variation in wind resistance, duration, or turbulence:
- Class A–shingles can perform in wind velocity up to 60 mph.
- Class D–shingles can perform in wind velocity up to 90 mph.
- Class F–shingles can perform in wind velocity up to 110 mph.
Manufacturer’s warranties for wind resistance vary from 60 mph for 20 to 25-year warranty shingles and 130 mph for lifetime warranty shingles. For the most part, warranties correspond with the notion that a more expensive shingle can withstand higher wind speeds.
Damage to Your Shingles:
Creasing: The most common wind damage that occurs to shingle roofs is creasing, where the shingle tab is bent up and down until a crease forms. This is similar to turning the pages of a book you have used multiple times, until a crease is formed on the spine.
Tearing: This damage occurs at areas of high uplift pressures and in extremely high wind speeds. This is when the actual shingle strip tears away from the roof deck.
Other issues: In addition to tearing and creasing, which tend to be the most common of issues, nail pulls, bending, flipping, and dislodging can also occur to your shingle roof. Often times, many of these occur due to multiple events or storms, not one single exposure to wind.