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Owens Corning™ Roofing Products Do I Need a New Roof?

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  • Need Help Deciding...:

    Your roof can make up more than half of your home exterior, so it contributes greatly to your overall curb appeal. A damaged roof can make your home look worn out and past its prime. Roof damage may also cause water infiltration to your home's interior, ice damming, or rotting of the wood decking just to name a few. Here are some common symptoms that indicate it may be time for a new roof. Click on any problem to learn what’s causing it and how to fix it.

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  • Algae Growth:

    POSSIBLE CAUSES

    • Algae growth causes a dark discoloration on roofs. The algae is usually brown to black in color which results in a streaked, dirty looking rooftop. It can be mistaken for soot, dirt or tree droppings, which typically produce only localized discoloration. It's caused by the growth of air-borne algae which deposits on your roof. The good news is that algae growth does not affect the service life of your roofing material. It occurs most often in warm, humid climates such as the Southeast (where algae-resistant shingles are available).

    
    RECOMMENDATIONS

    • Discoloration of roofs caused by fungus or algae is difficult to remove, but may be lightened by spraying a diluted solution of chlorine bleach, trisodium phosphate, and water onto the roof. Solutions range from one cup TSP, one gallon bleach and four gallons of water, to one cup TSP and 2.5 gallons each of bleach and water. This solution can then be rinsed from the roof in 10 to 15 minutes. Do not scrub. Scrubbing will loosen and remove granules. After spraying be sure to thoroughly flush the roof and the greenery around the home (grass, bushes and shrubs) with water. The effectiveness of this type of cleaning may only be temporary, and the discoloration may recur. High pressure washing is not recommended due to the possibility of removing granules, thereby shortening the life of the Roofing System.
    • For a more permanent solution, re-roof with Owens Corning Algae-Resistant Shingles. They are specifically designed to inhibit most algae growth for extended periods of time and are backed by our strongest product and algae resistance warranties* available to homeowners.

    
    ^*See actual Algae-Resistant shingle warranty for details. Algae-Resistant products are not available in all areas.

  • Buckling:

    POSSIBLE CAUSES

    • Improperly applied felt.
    • Wrinkled underlayment.
    • Roof deck movement.
    • Spacers not used in between roof deck boards.
    • Poor roof ventilation.
    • New shingles applied over old, rough shingles.

    
    RECOMMENDATIONS

    • Allow moisture to escape the Roofing System. This can be a slow process and could take until the following spring. Once the Roofing System reaches the proper moisture content, the roof should lay flat and the buckling problem should not return.
    • Remove the shingles that are affected. Cut the wrinkle in the felt and replace the shingles.
    • Add ventilation to the attic space. The minimum requirement is one square foot of net free vent area per 150 square feet of attic floor space if a vapor retarder is not present. If a vapor retarder is present, the amount of required ventilation can be reduced to one square foot of net free vent area per 300 square feet of attic floor space.
    • Consult the services of a professional. Make sure to apply shingles in accordance with the shingle manufacturer's recommendations.

     

  • Curling:

    POSSIBLE CAUSES

    • High nails.
    • Lack of back coating.
    • Under-saturation of asphalt felt in organic shingles.
    • Lack of ventilation.
    • Improper number of fasteners.

    
    RECOMMENDATIONS

    • Check location and number of fasteners.
    • Added roof ventilation can often correct.

     

  • Damaged Flashing:

    POSSIBLE CAUSES

    • Improper installation on a new roof.
    • Drying and cracking on an old roof.
    • Dented by improper nailing.
    • Settling of the structure.

    
    RECOMMENDATIONS

    • In most cases it is only necessary to remove and replace the flashing and shingles around the damaged area.

     

  • Missing Granules:

    POSSIBLE CAUSES

    • Normally a certain number of granules will be loose, especially after application. These granules are called "riders" and are a normal result of the manufacturing process. Granule loss does not affect the service life of the shingles unless granules can be seen missing on the surface of the shingles, thus exposing the asphalt or Fiberglass mat.

    
    RECOMMENDATIONS

    • On aging shingles, missing granules indicate a need for replacement.

     

  • Missing Shingles:

    POSSIBLE CAUSES

    • Improper fastening.
    • Exposure to high winds.

    
    RECOMMENDATIONS

    • Replace shingles which have completely blown off. For shingles with tabs blowing up and down, hand seal the shingles with an asphalt plastic cement, commonly referred to as flashing cement. This roofing cement must comply with ASTM D4586 -- Type I orType II which is the standard specifically for asbestos-free asphalt plastic roof cement. Some products meeting this standard may involve hazardous materials. This bulletin does not purport to address all of the safety and health problems associated with the use of materials meeting this specification. It is the responsibility of the user to observe the safety and health practices as determined by the manufacturer of the product and stated on the label, instructions and Material Safety Data Sheet (MSDS).
    • To hand seal, lift each tab of a 3-tab shingle and apply two spots of the cement under each tab. Each spot should be approximately the size of a quarter and placed 1" to 2" from each end of the tab and near the bottom. Laminated shingles require 4 spots of cement per shingle. After application, press the tab down firmly to start the bond. Be careful not to apply the cement too close to the bottom of the tab. This causes the cement to squeeze out when the tab is pressed down.

     

  • Ceiling Spots:

    POSSIBLE CAUSES

    • Spots are caused by leaks in the roof.

    
    RECOMMENDATIONS

    • Check attic for leaks in deck.
    • Check chimney and vents for cracks in flashing.
    • Check rafters for leaks that "travel" away from original source.
    • Check eaves for water backing up from ice dams.
    • Check roof for damaged shingles.

     

  • Blistering:

    POSSIBLE CAUSES

    • Moisture in the shingle.

    
    RECOMMENDATIONS

    • If the blisters break open revealing the asphalt, the affected shingles should be replaced.
    • Consult with the manufacturer of the shingles.

     

Owens Corning™ Roofing Products A Complete System

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  • More Than Just Shingles:

    A high-performance roof depends on an entire system of ventilation, underlayment, and shingle products working together. The Owens Corning™ Roofing System is a lineup of important products that can help provide maximum durability and beauty for your roof.

  • WeatherLock® Self-Sealing Ice & Water Barrier:

    The WeatherLock® Self-Sealing Ice & Water Barrier is a flexible, high performance self-sealing ice & water barrier for superior roof deck protection.

  • Felt Underlayment:

    Fiberglas™ Reinforced Felt Underlayment provides an extra layer of protection beneath the shingles to help prevent wind-driven rain from reaching the roof deck. It's an important part of a complete Owens Corning™ Roofing System.

  • Starter Shingles:

    Starter Shingles from Owens Corning eliminate the need for cutting shingle tabs, saving installation time while also providing easy application.

  • Shingles:

    Add durable beauty to your home.

    Owens Corning has the right shingle line for you. Choose from:

    • Berkshire® Collection
    • Woodmoor®
    • Woodcrest®
    • WeatherGuard® HP
    • Duration® Series Designer Colors Collection
    • Duration® Series
    • Oakridge®
    • Supreme®
    • Classic®
  • VentSure® Ventilation Products:

    VentSure® ventilation allows outside air to flow naturally upward and out of attic to promote a cooler, drier attic. Ventilation helps prevent moisture from becoming trapped in insulation, structural wood, shingles and roof deck to prevent rotting, mildew, drywall damage, peeling paint and warped siding. Provides year-round performance for consistent ventilation without energy consumption.

  • Hip & Ridge Shingles:

    Owens Corning™ Hip and Ridge shingles add an attractive, finished look to your roof’s hips and ridges. Not only do they increase the character and curb appeal of your home, but they also provide excellent protection to your roof’s peak.

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  • Installation Services Include:

    Let Lowe's do it For You!

    • Removal and haul-away of one layer of existing roofing materials, including shingles, felt, venting, drip edge and flashing. If more layers exist, additional fees may apply.
    • Installation of shingles for standard roof pitches on single-story structures. Fees may apply for variations.
    • Loading materials onto the roof, removing and replacing low-profile and turbine vents, and installing the 15- or 30-pound felt, drip edge, vent flashing and ice and water shield.
    • Cleanup after job is done.
  • Getting Started:

    1. Browse Lowes.com or your local Lowe's for the right shingles for you.

    2. Visit Lowe's and let one of our specially trained Project Specialists schedule an in-home consultation to determine the roofing materials and installation services for your roofing project and budget.

    3. Purchase your roofing materials and installation services together from the convenience of your home.

    4. Sit back and relax as our Project Management team handles your roofing project from start to finish.

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