Hail damage?

I thought this was blistering, now it looks like an older roof that’s suffered hail damage because we’ve had some pretty good ones here in the last few years.


Yes it does look like hail damage…and the shingles do appear old…I have not seen that stye here (anyway) in the last 30 years.

Do you have any closer views of the multiple spots showing up.

It does look more like blistering from the far away view, but an older dried out shingle is more susceptible to hail damage, especially if there are any air pockets under them, as would be typical of the wind-lock shingles or on a re-roof.


Being from the middle of the hail belt we call that hail damage:D

We also get a lot of hail damage in our area as well…and that does **not **look like hail damage to me. It looks like blistering…hail will knock those granuals off the blistered areas easily though.

My vote…definately blistering.

Another clue would be to check the flashings and evestroughing and metal fascia for denting from the hail.

Damage was not uniform throughout the roof, although these marks were scattered much less densly over most of the roof. No closer pictures, but this fist one shows the worst of it in the left foreground, I think it was North side. Second photo shows little damage but some granule loss and a little light damage.

Don’t see any dents or dings in the metal roof vents.

Haag has some useful free info on their site
as with any inspection, assessment over the net from photos is most likely inaccurate, but Doug’s observation is valid from the photos provided

Always retain the expertise of a qualified repairperson, one who has the skills and the knowledge related to their construction and installation and has received safety training to recognize and avoid the hazards involved, whenever repairs are noted

I was told that some bird $hit is very acidic and can damage shingles.

So they say


**Damage to Roofs by Droppings
**Bird droppings are very toxic and acidic in nature. They actually eat away at many substrates; especially shingle & tar based roofing materials. Droppings, which are allowed to accumulate on roofs, will eat into the material and deteriorate it, which will cause leaks. The life expectancy of a roof can be cut in half by just a light, but continuous application of bird droppings.

Along that line of thinking, that tree over the roof provides an excellent cover for birds roosting at night. They love to sit in the tree and apparently this is their favorite time to take a dump. I would include a picture of my wife’s car which sits under a large River Birch but all of us knows what bird crap looks like. It looks a pterodactyl roosts in that tree from the deposits.

BTW, what is the white stuff in bird crap?

scroll down…

It’s bird crap, silly.

Hail damage will form a dent, even if the granules are in tact. If no dents in the soft metal, then it is not hail damage…hail don’t skip the soft metal. The only way to tell is to lift a tab and see if the hail caused damage to the mat of the shingle. Sometime you can see a spider crack around the inpact. Blistering will be raised, like a small volcano. Bird **** should be lick tested…lol And then there is always the possibility of a manufactures defect.

If you look you can see hail dings in the upper right corner of the aluminum vent. We average at least one major hail storm every 5 years in my area; had one each of the last two years.

More HI’S in this state are sued for missing hail damage than any other item of an inspection. To many that won’t walk the roof. I have observed every pattern of hail that your mind can imagine. Most of the bad storms arrive from the S.W and have observed roofs with dings on the west side an none on the east side. Sparse patterns, Heavy patterns Total destruction. You name it we get it.

From the pics above if you did not call that roof out you would be paying for a new roof in this State. Call it what ever you like but it is in need of replacement. In my report it would be listed as hail dings and would be refereed to a roofing contractor. BTW I have never paid for someone a new set of shingles and I don’t intend to.

Exactly, I would call for replacement, and I always put possible Hail damage for them to try an insurance claim . We had a tornado come through here that was very bad, lots of hail,came through some people’s drywall ceiling… The hail was thinner and lighter in some areas with very light damage so I always put possible hail damage .

Recommended evaluation by qualified roofing contractor due to damaged, possibly defective shingles.

Been trying to teach this to the roofers around here for years…they’re not buying it.

Could you show me how that is done, before I write up a procedure to implement in our training manual.


Originally Posted by rcramer
Bird **** should be lick tested.

Been trying to teach this to the roofers around here for years…they’re not buying it.–

The problem is, you’re not describing the taste quite right, needs more research.

And they’re T-Locks to boot…very old,

It may have to do with the recipe we use