This happens most often in hot and humid climates.
Roof plywood buckling.
On occasion poor attic ventilation can cause the sheathing to become warped from underneath.
Apa recommends a 1 8 inch space between panel edge and end joints.
Such buckling may occur between supports or between nails along supports.
The most common cause appears to be movement in the roof sheathing with changes in moisture levels.
Your roof decking is the plywood sheets that cover your home.
Ripples or waves on the roof surface are a sure sign that the shingles or decking has probably buckled.
Occasionally the buckling is caused by poor workmanship wrong materials or possibly by a problem with the structure itself.
Improper installation of roof sheathing panels can result in warping or buckling of asphalt shingles.
However warped plywood sheathing means the entire roof has to be replaced immediately or it may collapse.
They are easy to work with readily available and perform the job well.
Roofs buckle because either the roofing underlayment has wrinkled or the wood deck itself has shifted for some reason.
If the wood structural panels are tightly butted there is no room for expansion and buckling can occur.
Continuous roof vents stationary roof vents turbine vents and power attic ventilators are just a few.
Plywood and osb roof sheathing are the most popular roof sheathing materials in the u s.
Call your builder and have him fix the buckled plywood.
That can mean costly time consuming callbacks.
When plywood or osb sheathing picks up moisture it expands.
However a more pronounced buckling in a line running up the roof like in the photo above is caused by buckling of the edges of the plywood or osb roof sheathing due to water intrusion or extremely high humidity in the attic.
When these boards are not properly fastened and nailed to the framing they can buckle as well.
Your builder is responsible for providing adequate soffit ventilation.
But they must be installed correctly.
Buckling of wood structural panel sheathing such as plywood or oriented strand board osb occasionally results when increased moisture conditions cause the wood to expand.
These ventilating systems work in conjunction with adequate soffit ventilation.
For a good reason.
If the sheathing is properly gapped then the gaps can close causing the shingles spanning the gap to buckle.
