Moisture in underlayment and roof decking.
Roof buckling problems.
Improperly applied felt.
The expansion is manifested in the panel warping twisting and buckling.
Moisture according to teco a building supplier moisture is one of the most common problems associated with wood structural panels buckling.
And this is a serious problem because if minor buckling is not addressed it could require a full roof replacement.
Your roof decking is the plywood sheets.
In new construction it is best to let the roof sheathing acclimate to local conditions before installing the roofing although this is not always practical.
As the panel s moisture content increases from exposure to rain or snow it causes the panels to expand.
Excess moisture must be allowed to exit the roofing system.
This then telegraphs to the shingles above.
This is what we call buckling.
Check for cracked housings on plastic roof vents and broken seams on metal ones.
Buckling shingles can sometimes be traced back to mistakes made during roof installation even though the buckling may not show up for a year or two after you get a new roof.
Underlayment such as owens corning.
Shingle buckling is one of those awful things that can happen to a roof through no fault of anyone.
Properly vent the attic.
You might be tempted to throw caulk at the problem but that solution won t last long.
Why does your roof have buckling shingles.
You may have curling or buckling shingles for a number of reasons but the.
Out of all the causes of buckling shingles the most common and the most damaging reason.
As long as it.
Improper installation and application of tar paper to the plywood.
Another cause of buckling can be wetting of the felt paper which will expand if it gets wet.
This sheathing is generally made from plywood or a similar material.
Asphalt shingles sometimes buckle slightly and in an irregular pattern due to moisture in a the materials of a new roofing system.
It is caused as a result of the movement of the wood roofing deck or wrinkling of the underlayment.
There s really no fix other than replacing the damaged vents.
Similar to felt an underlaynment is a vapor barrier.
What are the causes of buckling roofs.
But the moisture evaporates as the materials reach equilibrium with the the surrounding air and the shingles settle back down flat.
If the felt paper is rained on it s best to let it dry out before installing shingles.
Also look for pulled or missing nails at the base s bottom edge.
The wetness gets absorbed by the felt underlayment causing the felt to wrinkle.
For every 150 square feet of.
After it dries the roof should be flat again.
Under your shingles there is a layer called the roof sheathing.
By removing the affected shingles the wrinkled tar paper can be repaired by cutting and reattaching it so that it is.
