What causes this distortion.
New roof some shingles not flat.
Lumpy bumpy or curling shingles that do not lie flat can be problematic but don t hire a new roofer yet.
Roof shingles are not lying flat new shingles not sealing down.
In some instances the shingles will seemingly fix themselves almost like magic.
If your roof shingles are not lying flat there can be several possible reasons.
Sometimes this problem is more apparent on north facing roof slopes that don t heat up sufficiently for the shingles to seal until summer.
After installation an appearance of bumpiness or lifted shingles may be evident.
Most communities have building codes that prevent homeowners and roofers from installing more than.
Check the roof by applying pressure to areas of the roof.
Why are new roof shingles not flat.
In most cases new asphalt shingles are installed by overlapping one from another or by interlocking this creates a barrier against different forces of the weather most notable rain snow.
Before new shingles seal down they can look a little lumpy and uneven but once the roof gets hot enough they should soften flatten and form a permanent seal.
Standard asphalt shingles feature an adhesive strip that softens during warm weather.
The minimum pitch required for shingles is 2 12 which means for every 12 inches the roof rises 2 inches.
The shingles do not flatten out or conform to the roof deck because they were distorted while in the bundle.
Any slope that has a pitch less than 2 12 is too flat for shingles and should be covered with flat roof materials such as tpo pvc epdm rubber or others.
These would include your roof s age the temperature and weather conditions and the overall roof condition.
The hump that you may be seeing could be the result of stacking the shingle bundles on the ridge of the roof.
Then when used they do not lay flat.
Shingle bundle distortion is a phenomenon that can cause shingles to not lay flat after installation.
Pramote polyamate getty images.
A more serious problem could be that they shingled over extremely buckled felt paper.
The extent of the problem depends upon many factors including the age of the roof the outdoor temperature and the overall condition of the roof.
Which is why in it is bad to stack shingles over the ridge a crap shoot.
You should be able to see the difference.
Nails in your yard.
It may just be that the shingles need some warm sun and everything will be fine.
Most felt paper will not lay tabletop flat in cold weather.
Other times it will require costly repairs to correct the issue.
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