Hail is crazy stuff, but what is it?
Hail actually forms when thunderstorm updrafts are strong enough to carry water droplets, dust particles, or other small particulates well above the freezing level. These particles/water droplets are carried high into the cloud where they accumulate layers of ice depending on their speed through the cloud as well as the moisture conditions in the cloud. Further, the hailstone actually is warmer on the outside so it is somewhat "sticky" which allows other hailstones to collide and join with it. Sometimes it's a wild ride and hailstones sometimes keep getting even bigger and bigger until we see some devastating hail storms. That's also why most large hailstones are not round.
Additionally, hailstones can vary in size during the same storm. Often hailstones at the beginning and end of the storm are different sizes than the hailstones during the storm.
Hail size is often compared to common objects. Hail in the quarter-size (1 inch) and larger are much easier to assess as far as damage caused. However, even the pea-sized hail can cause roof damage. This is dependent on several variables. The sizes are as follows:
- pea = 1/4-inch in diameter;
- marble = 1/2-inch in diameter;
- dime or penny = 3/4-inch in diameter (hail the size of a penny or larger is considered severe);
- nickel = 7/8-inch;
- quarter = 1 inch;
- golf Ball = 1½ inches;
- tennis Ball = 2½ inches;
- baseball = 2¾ inches;
- tea cup = 3 inches; and
- grapefruit = 4 inches.
Table 1 shows the size of a hailstone typically required to damage various types of roof-covering materials.
This is a general guide only, since there are a number of factors that determine how damaging the hail will be.
TABLE 1
Material | Hail Size | Damage Size | ||
3-tab organic shingles
|
1 inch
|
1 inch
| ||
3-tab fiberglass shingles
|
1¼ inches
|
1¼ inches
| ||
cedar shingles
|
1¼ inches
|
1¼ inches
| ||
fiber-cement tiles
|
1¼ inches
|
1¼ inches
| ||
flat concrete tiles
|
1¼ inches
|
1¼ inches
| ||
heavy cedar shakes
|
1½ inches
|
| ||
30-year laminated shingles
|
1½ inches
|
1½ inches
| ||
built-up gravel roofing
|
2 inches
|
2 inches
| ||
S-shaped concrete tiles
|
2 inches
|
2 inches
|
Organic 3-tab shingles are the most fragile shingles and can sometimes be damaged by hail as small as 1 inch in diameter.
Three-tab fiberglass, cedar shingles, fiber cement, and flat concrete tiles may show damage when hail reaches about 1¼-inch in diameter.
Heavy wood shakes and thicker fiberglass shingles typically show damage when hail reaches about 1½-inch.
Concrete S-tiles show damage when hail reaches about 2 inches.
It can be difficult to tell the size of a hailstone by the damage it leaves.
Additionally, damage left by hailstones of the same size can vary, depending on the hailstones’ density, their angle of impact, the properties of the material they hit, as well as wind velocity and other factors.
How Can I Tell If My Shingles Have Sustained Damage?
If you look at the pictures of the shingles at the left, it is quite obvious that the top shingle is missing granules. It has sustained obvious damage and its integrity compromised. Once granules are gone, the tile is susceptible to corrosion from the sun as well as making it more permeable to water leakage.
It actually takes quite a bit to knock granules off a roof tile.
The size of this damage would indicate a large hailstone with a powerful impact.
Not all hail damage is as easy to spot, but can be just as damaging. The photo to the left again shows hail damage. Although the area with missing granules is smaller, it still compromises the integrity of the roof. There is still the potential that the roof could develop a leak.
Many times it is really difficult to spot this. However, Lowry Roofing Co professionals are trained to spot this kind of damage.
As a general rule, most insurance companies want to see 8 or more hits on the roof within a 10ft x 10ft square on at least 3 sides of the roof in order to consider replacing your roof.
Lowry Roofing Co can assess the damage to your roof and determine if your roof qualifies for replacement. They will mark the areas and do a thorough assessment. They will then go over their findings with you.
So, what do I do If I think I have hail damage?
If you’re a homeowner and think you may have hail damage, the first thing you should do is call Lowry Roofing Co for a free roof inspection.
If the inspection shows you have damage, your next step would be to file an insurance claim with your homeowner's insurance company. Insurance coverage depends on your policy and the professionalism of your roofing inspector. A roofing professional can determine whether the damage is functional or cosmetic in nature which will largely determine whether or not your insurance will pay for a new roof.
As a side note: Be sure to have a professional like Lowry Roofing Co do a free inspection of your roof even if the insurance company has sent someone out to assess it. The insurance company adjustor will be looking after the interests of the insurance company and you can be assured that with an inspection by Lowry Roofing Co your interests will also be represented.



























