If you have ever wondered the pro and cons of these two roofing methods, then you should read this article on roofing for the Charlotte Metro area.
What is a Tear-Off?
This is a common roofing project. Basically a roofing contractor and their crew will come to your home and completely “tear-off” or remove all the old shingles from the roof. They will then inspect your roofing deck (the wooden base over your rafters) and replace and seal it as needed. Then they will then completely re-cover your roof with new shingles from top to bottom.
What is a Roof Overlay?
While overlays save on time, labor and disposal costs (it is required by code that waste shingles from a tear-off be taken to a local landfill or similar disposal center), they can only be done if certain conditions are meet. If the existing roof is in good condition, has only one layer, lays flat (no bumps or rolls) and has no leaks or any problems with the underlying roof deck (soft spots); a complete tear-off or removal may not be needed.
However if your roof has any of these problems or conditions then you must a tear-off:
~ More than 1 layer – if a root has 2 layers then is should be torn off. In many cases this is building code requirement. If you are uncertain, contact your local building inspection department or a North Carolina licensed roofing contractor.
~ Your Roof Decking Needs Repair – You can call any local roofing contractor to do an inspection of your roof’s decking. If he finds any soft or spongy spots while walking on the roof or he points out sagging sections between the rafters, there is good chance the underlying structure is damaged or is deteriorating.
Deterioration can be caused by the plywood decking becoming wet and delaminating over time, or from dry rot due to mold or mildew.
~ Another common problem well known to a roofing contractor are ice dams. In some parts of the South like North Carolina, roofing companies get plenty of calls concerning ice dams. When temperatures start to hang below 30° F and a roof has no ice or water membrane to protect it, a building can unexpectedly develop thousands of dollars in damage during cold snaps.
~ Your Current Roof is in Poor Shape – The condition of the existing is a big deciding factor on whether a recover or overlay is feasible. Curled tabs, bumps or torn shingles are signs you should consider replacement roofing, a roof contractor can give you an estimate.
Now that you understand a bit more about roof repair and what to expect, you are ready to click the link below to contact a respected roofing professional to get an through roof inspection.