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Old 08-22-2007, 09:16 PM   #31
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CertainTeed Landmark 50 asphalt shingles


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Originally Posted by Wendy Honold View Post

I have gable vents, ridge vents and eves vents.

He says, as does CertainTeed that some gravel loss is normal. He claims that if I have issues with the performance of the shingles, that it would be a warranty issue and not involve him.

He claims that the shingles are installed correctly.

I purchased this home in approx 1987 and replaced that roof in 2005. In all those years there was no gravel loss.

The amount of gravel I'm losing now is alarming. I don't think these shingles will last a decade even though they are 50 yr.

The gable vent and the ridge vents installed in conjunction with each other would be short-circuiting the air flow for proper balanced attic ventilation performance.

The old roof did not show signs of granule loss, because the looser "Rider" granules had already been washed off over the many preceeding years.

The new roof still has many of the excessive "Rider" granules yet to be washed off.

How much of your soffits are vente? Is every single aluminum panel a vented panel? What is the manufacturers stated NFVA performance for the type of panel it is?

If you do not have aluminum soffit panels and they are wood, then how many circular, oval, or rectangular under eave vents are in place. Each one has a stated amount of NFVA from the manufacturer and that must be equal to or greater than the amount of exhaust NFVA.

By the way, NFVA stands for Net Free Ventilation Area. It is a number, usually in square inches, which represents the flowage of venting air that can travel through the product.

Most roofers do not take the time to calculate the proper amount of either the intake or the exhaust ventilation required.

Ed

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Old 08-22-2007, 09:44 PM   #32
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CertainTeed Landmark 50 asphalt shingles


Wendy, you did have the buckling problem before the gable vents were installed...Correct?

I don't think heated or unheated has anything to do with the ventilation question. That is to say, in the summer it can get real hot in the attic space if there is not enough ventilation. Moisture can also be trapped. Such heat and moisture can cause or contribute to the problem.

Guys do I have that right?
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Old 08-22-2007, 09:50 PM   #33
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CertainTeed Landmark 50 asphalt shingles


I wasn't referring to the buckling problem. Her photo did not show enough detail to make an accurate assessment of the cause of the problem and an educated description of a solution.

The granule loss may possibly be attributable to excessive interior attic heat that has not been allowed to flow freely and escape.

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Old 08-22-2007, 09:58 PM   #34
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CertainTeed Landmark 50 asphalt shingles


I meant do I have this right as to why ventilation is important...

"In the summer it can get real hot in the attic space if there is not enough ventilation. Moisture can also be trapped. Such heat and moisture can cause or contribute to roofing problems ."
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Old 08-22-2007, 10:14 PM   #35
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Yes,

Now I understand.

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Old 08-23-2007, 01:55 AM   #36
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CertainTeed Landmark 50 asphalt shingles


gable vents can interfere w/cross ventilation between ridge and soffit vents,the granule loss is minimal(associated w/normal wash off)IMO-the buckled shingles could be a problem though there is only one photo of this,which looks like ,buckling or improper underlayment installation(not installed flat or w/out buckles or possibly was wet)-the buckles are typically installation related,and he should deal w/them-IMO---I am posting a link to the pics she sent mehttp://www.rooferscoffeeshop.com/show_album_photo.asp?userid=78&AlbumID=659&file=50 05&s=0-------GOOD LUCK!

Last edited by the roofing god; 08-25-2007 at 11:36 AM. Reason: spelling/fix link
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Old 08-23-2007, 08:35 AM   #37
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GAF site says only close off gable vents if using continuous soffit vents. They show a picture of ridge vent, gable vents, and corner soffit vents. They say there looking for 1ft of vent for every 300 sq ft of attic space.

However, They do specify with Snow Country ridge vent to close off the gable vents.
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Old 08-23-2007, 08:40 AM   #38
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TRG link no work.
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Old 08-23-2007, 08:46 AM   #39
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gable vents can interfere w/cross ventilation between ridge and soffit vents,the granule loss is minimal(associated w/normal wash off)IMO-the buckled shingles could be a problem though there is only one photo of this,which looks like ,buckling or improper underlayment installation(not installed flat or w/out buckles or possibly was wet)-the buckles are typically installation related,and he should deal w/them-IMO---I am posting a link to the pics she sent mehttp://http://www.rooferscoffeeshop....&file=2400&s=0-------GOOD LUCK!
I didn't know that wet shingles/deck could cause buckling. I'm glad I laid out my OC shingles to dry. They were soaked because of the plastic wrap and being stored outside. There are a ton of roofers that leave a job unfinished and do not tarp over their work. For example, half the roof plain will be shingled. When it rains, I would think that water would run under the shingles between the underlayment. I would think that buckling would occur. Is buckling from a wet deck/ wet shingles really that prevalent in the field?
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Old 08-23-2007, 09:06 AM   #40
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I don't know. My roofer just called. I've been put off till tomorrow because he was held up by rain yesterday. I told him what I read about wet decks. He said he never heard of it. Says, been roofing 25 years and never had a problem (gulp). Says when they roof in winter and strip a deck there's water all over from the snow. That don't make sense to me. Tar paper will buckle when wet. I don't care what he says, I won't let him start unless the deck is dry. Tomorrow will be very hot. I would rather they did not roof when hot. Don't see a way around it though.

Moisture under the shingles is a problem. Thats one of the reasons there's much ado about venting.

I did my roof myself 23 years ago. 3tab, GAF or Owens corning. Can't really remember. Still lies dead flat. Lots of moss and and algae up there now. Decking feels solid under all that (I butt walked it).
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Old 08-23-2007, 12:17 PM   #41
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common knowledge=wet paper buckles,wet wood absorbs moisture and will buckle unless dried,I roof in the winter also,but you remove snow and rip from the top down,and typically the deck is kept dry unless you`re sloppy about it,ask him why he doesn`t wear a raincoat and roof in the rain if it doesn`t matter
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Old 08-23-2007, 12:28 PM   #42
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trying to link it again here
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Old 08-23-2007, 12:30 PM   #43
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CertainTeed Landmark 50 asphalt shingles


see if I can get others
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Old 08-23-2007, 12:33 PM   #44
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best I can do ,the others are too large
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Old 08-23-2007, 12:38 PM   #45
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Originally Posted by the roofing god View Post
common knowledge=wet paper buckles,wet wood absorbs moisture and will buckle unless dried,I roof in the winter also,but you remove snow and rip from the top down,and typically the deck is kept dry unless you`re sloppy about it,ask him why he doesn`t wear a raincoat and roof in the rain if it doesn`t matter
I understand the felt wrinkling and plywood buckling causing the shingle to look wavy or buckled. I was referring to the actual shingle buckling because it was wet.

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