Owens Corning A Solid Strip Of Tar

dougger222

BTW,

Nice post Ed! Will have to bookmark that for future claims (if the insurance company isn't flipping the bill)!!!

Speaking of hail, two jobs I finished up the other day had damaging hail the same night, both were replaced due to hail damage of Aug. 2006.

Ed the Roofer

Glad you liked it. here is a little more from inside that massive contents. Take your time and read through this mans site, as he has a wealth of useable information about everything on it. Check out the mold information as well.

Ed


SHINGLE LIFE / WEAR FACTORS for Asphalt Shingle Roofing Products

While the historical cost-performance of this product has been good in most cases, durability issues and wear-out or material failures occur earlier than expected in some situations. The expected life of a roof covering depends on many variables including:

• Asphalt Shingle Quality: type, quality, thickness, shingle design (cutout 3-tab versus laminated) and rated or design-life of roofing material selected
• Asphalt Shingle Color: in hot sunny climates lighter colors tend to resist sunlight damage and last longer.
• Roof Shingle Age: the shingles in the photo at the top of this page are organic based asphalt (asphalt-impregnated paper coated with mineral granules) at or near the end of their life. Typical life expectancy for roofing products can vary widely as a function of the material composition, type, installation details, and other factors discussed in depth at this website. Typical shingle life expectancies range from about 15 years to 40 years.
• Roofing material storage conditions before & during installation
  • Sunlight and Heat Effects on Asphalt Shingles: Storing shingles in hot sun makes them stick together, making damage likely as they are pulled out of their bundle.
  • Cold and Freezing Effects on Asphalt Shingles: Storing shingles in freezing conditions increases the chances that a shingle will crack when being used if applied in cold weather, especially ridge cap shingles which break when bent. We used to cut those and then leave them inside on a radiator until needed.
  • Rain Effects on Asphalt Shingles: believe it or not, shingles are not quite waterproof and depend on roof slope to shed water effectively. Shingles that are left exposed to rain and then installed may violate the manufacturer's warranty and may fail early, possibly due to the effects of temporarily trapped moisture at the time of application. I've found sections of asphalt shingle roofs all showing early wear traceable to a specific bundles of asphalt shingles that were at the top of the stack and exposed to the weather. This photo shows the effects of rain on shingles when the bundles were left outside for some time before use.
  • Stacking Shingles in Storage: shingles should not be stored at the supplier nor at the job site stacked higher than two pallets. If shingles need to be stacked higher, separator boards or plywood are needed under each pallet to protect the shingles below from damage by the weight and edges of the pallet and shingles stacked above. We've seen shingle pallets eight-high with no inter-pallet protection at HG Page Lumber in Poughkeepsie and at an occasional Home Depot. But don't try giving the supplier your personal advice about how to stack their product, you'll just annoy them. Inspect and reject visibly damaged shingle bundles and hope that there are not more subtle damage effects not visible at first sight.
  • Bending Asphalt Shingle Bundles: roofers like the shingle bundles to get up on the roof by magic - by a special loader or carried up by an assistant. A smart assistant spreads the bundles out over the roof to avoid too much weight in one place (point-load structural failures). But especially on a steep pitch roof, some "experts" put all of the bundles of shingles across the ridge. Bending shingles over the ridge, especially in cold weather, may violate the manufacturer's warranty and may damage the shingles, including subtle damage that appears after installation as early cracks, tears, or failures. Reference: http://www.owenscorning.com/around/r.../Classic-C.pdf from Ownens Corning cites their requirements for handling and storing shingles.
  • Asphalt shingles should be stored: flat, in un-opened bundles with labels intact and legible, in cool, not freezing and not hot temperatures (under 110 degF.), under cover, protected from the weather, protected from damage by stacking more than two pallets high, and kept that way until they are ready for use.
  • Asphalt roof shingles should be delivered: in flat, un-damaged, un-opened bundles, protected at the job-site (as described above), and when moved to the rooftop, shingle bundles should be laid flat, not over the ridge, and should not be placed with too much weight in locations that may damage the building structure.

• Building factors: roof slope, problem areas in roof shape & design, orientation towards sunlight
• Roof Ventilation: attic or under-roof ventilation. Un-vented roofs, especially in sunny hot climates, stay at a higher surface temperature and can be expected to have a shorter life.
• Technical material composition and asphalt shingle design details (roofing material components, manufacturing process, wind-uplift prevention)
• Marketing and economic considerations (aggressive sale of new roofing material by some contractors, reluctance to or economic reasonableness of patching damaged areas on older roofs)
• Manufacturing Defects and Asphalt Shingles: even the best manufacturers are at risk of episodes of producing a defective product. The asphalt shingle manufacturing line is a challenging environment where variations in control of the process can produce a defective product with a reduced life. The thermal splitting failure discussed at this website is an example of a widespread fabrication defect that affected many asphalt shingle manufacturers.
• Weather and Weather Exposure: variations in climate and other local weather conditions affect roof shingle life
• Wind Effects on Roofing: exposure to damage (wind, tree limbs, hail, snow, ice, foot traffic). Key in wind blow-off of asphalt shingles is whether or not the shingles were properly installed, especially properly nailed according to the manufacturer's recommendations. Also on occasion a brand new roof that has not had a chance for its self-sealing adhesive to work may blow off in windy conditions even if it was nailed properly. Review the workmanship defects below as a number of them constitute improper nailing and can cause a wind failure of roofing that may otherwise may be mis-diagnosed.
• Roof Installation Workmanship: installation/workmanship details such as the following:
• • Nailing of Asphalt Shingles: asphalt shingle roof nailing errors: improper nailing pattern, omitted nails, too many nails, nails not properly placed in the shingle, and lazy use of the roofing nailing gun: nailing without moving on the roof, leaning out too far, making nails enter the shingle on an angle so that the nail head cuts the shingle; failure to set nails properly (too deep - cuts shingle, too shallow, cuts shingle above). The older roof nailing guns that used staples required even more careful use of that tool. If the roof shingle staple was driven too deeply it cut the shingle and it would blow off of the roof. If the shingle was left too high or canted (lazy-leaning out too far again) the protruding staple cut the overlapping shingle above.
  • Underlayment Effects on Shingle Life: omitting the underlayment, installing underlayment or shingles over a wet, icy, or snow-covered roof deck
  • Roof Flashing Errors: there are too many of these to list on this asphalt shingle page. Water runs down hill. Flashing installers sometimes forget that, misplacing flashing, omitting flashing, using continuous rather than step flashing at roof-wall abutments and at chimneys, improper valley flashing, nails through flashing, relying on roof cement rather than flashing, and misplacement of drip edge with its vertical section behind rather than over gutters. OPINION: some roofers opine that underlayment is completely unnecessary. I go with the manufacturer's recommendations. They have a high interest in the successful application of their product.

On Asphalt Shingles:Carl Cash asserts that the mean durability of "20-year" shingles is less than 20 years everywhere in the U.S. except Alaska. Variations in climate permit calculation of a wear-acceleration factor for various cities. Higher thermal load (hotter climates) means shorter life. Yuma, AZ mean durability was calculated at 12.6 years, for example, and Ft. Meyer FL 14.1 years while Chicago at 19.7 years and Erie, PA at 20.7 years showed longer life in cooler climates.
Cost Effectiveness of Asphalt Shingles:

Other roofing materials also are affected by thermal loading. Cash calculates that the life cycle cost of steep-slope roofing shows that asphalt shingles still provide the most economical performance for the home owner! ("Asphalt Shingle Performance," Carl Cash, P.E., Construction Business and Technology Conference, Providence Rhode Island, 2/28/97.) Given these variables, it is not likely that a "20-year" shingle will expire exactly twenty years after it is installed. When a roof lasts longer than its promised life no one complains. If a roof needs replacement substantially sooner than its anticipated life, consumers are understandably concerned.

nolo

I'm thinking the same thing. I guess nobody makes a perfect shingle. Am I really making a horrible mistake with OC?

Big Mike

The OCs are not working at all for me I also use the Certainteed line and the new GAF- ELK shingles they have been good to me so far

tinner666

I think the life of most roofs are less than you think. When having extended conversations with customers and potential customers, I find that most will eventually mention the 'brown spot' first appeared 4-5 years ago.
There is a reason for this. They, and WE are conditioned to claim that 'THis last storm' caused the leak. We all know the insurance companies will deny claims on existing and accumalative damages.
This puts the failure dates at about the 6-8 year mark in many cases.

Just my observation on what I've seen and heard from homeowners.

__________________
Frank Slate Roof Repairs, Richmond, Va.

tinner666

And about the sealer strips. on ANY keyway, water will stray under the shingle, slate, tile, and anything else used. I have slowly torn a roof or 3 off trying to find leaks on 3-tabs and dimensionals. 98% of the time, I could find NO causation per-se.
The water getting to the deck would originate at a healthy joint. No holes, cracks or damage, but the water would be coming in. In SEVERAL places. Dimensionals: water would apparently over load the headlap, almost always if the joint was below a valley of other water accumalater.
3-tabs: Enough water would traverse the shingles and come in at the joints 6" away. I seen a lot of these.
I have NEVER ripped a 'problem roof' without taking a LOT of time to analize what happened and where.

__________________
Frank Slate Roof Repairs, Richmond, Va.

theroofinggod

with balanced ,waterproofing,sufficient insulation,and balanced ventilation,most mfgrs roofs perform about the same---I have heard of the water being trapped with the solid OC sealant and rusting the nails out before though

__________________
"If it`s worth doing.It`s worth doing right!!!

www.ADVANCEDROOFINGNEWYORK.com