Damaged decking could also cause a wavy look to shingles.
Is a wavy roof bad.
Inspect the plywood from the attic and look for cracks sagging or rotting.
These would include your roof s age the temperature and weather conditions and the overall roof condition.
This is a bad move a roofing company should not lay new roofing shingles over shingles that are wavy.
If any of this is found be sure to have a roofer replace any plywood with the required thickness of board that is code for where you live.
Roofs may become wavy over time or they may have been built that way to start with.
If your shingles are curling bumpy wavy or lumpy this can potentially be a problem.
If the felt paper was bubbly or wet when it was applied then it will cause the roof to look wavy.
Roofing isn t complex really but it is exceptionally precise.
When a homes foundation shifts is not level or damaged then the foundation issues may be reflected by a sagging bowed or wavy roof.
The most likely reason an older roof would start to look wavy is that the decking has been damaged.
This is the best case scenario for a wavy roof because typically the paper will end up flattening itself after a few weeks of summer weather.
A layer of shingles was applied over an old layer this only happens if you worked with a bad roofing company.
Quality of the.
If your roof shingles are not lying flat there can be several possible reasons.
Most that become wavy do so over time.
The waviness generally does not cause a roof to leak but it may be architecturally unsightly or occasionally can indicate a problem.
This is why working with trusted professionals is so important and why the lowest quote doesn t always mean the best.
A new roof will be required after stripping both layers of shingles to achieve a quality flat look.
If your roof is starting to get some age on it there are really only a few reasons it might start to look wavy.
However you don t have to start panicking just yet.
And most of them are bad news unfortunately.
A good contractor will never just add a layer of shingles over an existing layer of shingles they ll remove your old shingles first.
