Common flaws include undersized rafters insufficient sheathing or too few rafter or collar ties.
Nachi roof sagging.
If you see sagging rafters recommend stabilization by a qualified contractor.
Rafters are typically installed on 24 inch centers.
Rafters are typically installed on 24 inch centers.
The concerns regarding moisture standing water durability and appearance are different.
Specialty steel click here to learn more about nachi products.
If you see sagging rafters recommend stabilization by a qualified contractor.
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Keep your attic well insulated and ventilated to prevent ice dams which can cause roof leaks.
Hydraulics click here to learn more about nachi products.
The internachi owens corning roof data technician program this program is open to internachi members in the u s.
In fact if designed correctly roof overhangs can protect the building s exterior walls from moisture and sun.
General roof inspection online video course.
Robotics click here to learn more about nachi products.
Click here to learn more about nachi products.
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.
Roofs also provide protection from the sun.
If you see rafters installed on centers greater than 24 inches look for signs of failure such as sagging of the rafters.
It s an indication that you should look carefully for other problems in the roof framing.
The roof insulation and ventilation must all work together to keep the building free of moisture.
Sagging rafters or inadequate rater ties can cause the ridge to sag and the exterior walls to bow out.
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.
Bearings click here to learn more about nachi products.
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.
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.
