I’ve been inspecting for 15 years and I have never seen tar dripping from under the shingles onto the shingles below it.
I’m thinking that the manufacturer machining had applied too much tar for a tar strip.
Your thoughts?
Neither have I.
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Get the manufacturer’s rep out there to have a look see. 
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I do a ton of roof inspections and I’ve never seen that before either. I would suspect that the roof doesn’t have adequate ventilation and excess heat is building up. It could become a serious problem if the sealant leaks out and they have strong winds later. Is that an ice damn heat wire on there as well? I agree with Larry about contacting the manufacturers rep.
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I doubt that is it…But it is a mystery…How knows?
Brother Valley if you ever find out the cause please let us in on it.
If i have to guess - this is a DIY roofing with extra adhesive applied.
Was it a good idea? Obviously not.
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We are all aware of the old saying: if a little tar/caulk/adhesive is good, then a LOT would be better! lol
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I suspect you are right. When you look around the skylight the drips are above and below but not to the left.
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Thanks but the ventilation is more than adequate with 3 thermostat activated fans. All south facing roof fields are the shingles with tar dripping. My thought is that the machinery applied too much tar on the strips.
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Nope, professionals installed these 10 year old shingles. They Seller had the paperwork and will be contacting the roofing company.
I guess that’s possible. Do you know which shingle brand?
Were the soffits open and venting properly? Just from my experience dealing with the manufacturers reps here, the first thing they look at is ventilation of the roof and soffits. I’m not a huge endorser of the thermostat fans, I would take a good ridge vent and properly vented soffit over them any day. The thermostats fail too often on the fans.
Many of the contractors around here will install vented vinyl soffit over an existing closed wood soffit making it appear vented from the exterior but little to no airflow exists.
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I personally don’t give a flippin’ crap who and/or what…nor Why!
Just please call it out and move on…OK?
The flippi’ roof it rainin’ tar…
What else could you really comment on…
Attitude much ?
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100% ventilation. Ridge, soffit and thermostat controlled fans.
Ok then it has to be a shingle defect
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Did the OP lift a shingle to see the story?
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…with the tar dripping out like that? WOW!
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Couldn’t get one to lift. My thought is the the machine sprayed double the tar that was needed.
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Hand sealed shingles? Maybe the roof was installed in cold weather or high wind area…
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