It's not hard to understand when a roof has missing shingles
it's not a good thing. Missing shingles will usually occur in only
- Improper Nailing: Of course
missing shingles can happen when roofing shingles are not installed
and nailed properly. A nailing pattern is designed in a certain
way. If an installer deviates from that, many problems can occur.
The industry calls it "skip nailing." An example may
be that the manufacture recommends four nails per shingle - however,
the installer wants to move along faster and takes it upon himself
to use only 3 nails per shingle. This causes the shingle to slip
downwards and eventually detach itself from your home.
- Improper Installation Pattern:
If shingles are installed improperly with too much or too little
exposure they will not adhere themselves to the designed adhesive
strip. Each shingle has a tar line or what some call an adhesive
strip. This strip adheres the shingle tabs to the shingle row
below it. If shingles are not installed according to manufactures
suggestion, this adhesive will not line up properly - and cause
the tabs to break away.
- Drying And Cracking: When
shingles age and they are exposed to sun and exterior elements
for the life of the shingle, they begin to dry-out and crack.
This drying and cracking causes the shingles to tear away.
- Wind: The majority of the
time, if you have missing shingles on your roof the culprit will
be wind storms. High winds can cause what is called "Uplift."
Thunder storms, hurricanes and even wind storms with little or
no moisture can blow across a roof so strongly that the shingle
tabs will lift upwards. So much pressure over a short period of
time will cause the tabs to break away.
Of course you will need to at the very least 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.
If you have larger areas of missing shingles then you may need
to replace your entire roof or that entire section of roof. In most
cases wind damage is covered by your homeowners insurance. If you
feel you may need your entire roof replace do to large areas of
damage from a wind storm, you should call your insurance company.
For a more permanent solution, re-roof with Owens Corning Shingles.
They are specifically designed to withstand North and south Carolina
moisture conditions for extended periods of time and are backed
by our strongest product warranties* available to homeowners.
For the average homeowner this process can be difficult and dangerous
to do on their own. Patton General Contracting* is a certified installer
of Owens Corning roof products as well as RoofLock - a product designed
to clean and protect your roof from this type of issue. Visit
here for more information.
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Other Issues You May Have
with any type of work you personally do on your home or in this
case inspecting your roof, please use caution and safety equipment.
If you do not feel comfortable inspecting your roof or you have
trouble knowing what exactly to look for, please feel free to contact
us for a free consultation.
Visit Here to view
home photos using Owens Corning Roofing System.
Feel free to contact
us at any of our North and South Carolina
locations with any questions or concerns you may have about
your roofing needs. We will be happy to assist you in any way we