Keep your attic well insulated and ventilated to prevent ice dams which can cause roof leaks.
Nachi roof sagging.
The roof insulation and ventilation must all work together to keep the building free of moisture.
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Weight related sagging can also be caused by design flaws that leave the roof unable to support its own weight.
Rafters are typically installed on 24 inch centers.
If you see rafters installed on centers greater than 24 inches look for signs of failure such as sagging of the rafters.
Sagging rafters or inadequate rater ties can cause the ridge to sag and the exterior walls to bow out.
The roof data technician program developed by internachi and owens corning provides an additional revenue stream for internachi members who are hired by owens corning as part of a roof warranty claim resolution process.
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General roof inspection online video course.
If the framing is sound and problems are not found elsewhere but the roof still sags the problem might have originated because of poor installation of the plywood sheathing or shingles.
If you see rafters installed on centers greater than 24 inches look for signs of failure such as sagging of the rafters.
Common flaws include undersized rafters insufficient sheathing or too few rafter or collar ties.
In general for areas in which you can t see the framing directly you ll be looking for signs of failure such as sagging unevenness or cracking of the interior or exterior wall coverings.
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Roofs also provide protection from the sun.
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Inspectors may notice that adobe walls are pitted bulging or cracked or the roof may be sagging but the cause of these problems may not be obvious.
The concerns regarding moisture standing water durability and appearance are different.
Yet historic and modern adobe structures share common deterioration problems so it pays to understand the basic vulnerabilities inherent in the material.
It s an indication that you should look carefully for other problems in the roof framing.
The internachi owens corning roof data technician program this program is open to internachi members in the u s.
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Rafters are typically installed on 24 inch centers.
