Multiple things could cause these small raised sections.
Shingles bumps on roof.
Asphalt shingles can blister as a result of trapped moisture in the shingles.
Blistered shingles can be replaced but if the main cause isn t solved you ll likely have the same problems in the future.
Those ripples bumps can be pressed down easily which suggests that there is space between the shingle and decking i e shingles are not properly supported by the decking where there are ripples.
I had my shingle roof replaced a couple of weeks ago using 25 year shingles and 30 lb.
This article explains how to identify explain the causes of asphalt roof shingle blistering or blister rash on asphalt roofing.
Blisters can pop from slight impact or if you accidentally step on them during a roof inspection.
Browse owens corning roofing shingles by color shingle lines price features wind resistance and or warranty to find the right roof for your home.
In addition to blisters overheating can cause other roof deformities such as warped decking or trusses which can push the shingles up into ridged or undulating formations.
A broken sagging rafter will also cause a dip in the roof s surface.
What causes bumps on your roof.
By removing the affected shingles the wrinkled tar paper can be repaired by cutting and reattaching it so that it is flat.
Solutions to roof buckling.
The key is when the shingles are installed.
Although shingles can occur anywhere on your body it most often appears as a single stripe of blisters that wraps around either the left or the right side of your torso.
Shingles is a viral infection that causes a painful rash.
The nails slip out of the sheathing and create small visible bumps on the surface of your roof.
Shingles is caused by the varicella zoster virus the same virus that causes chickenpox.
If the shingles on a roof have trapped moisture they are likely to start blistering when the sun heats the roof.
One can see clearly lots of ripples bumps all over the roof but one section is much worse than the rest.
Lets start with the small random bumps on your roof.
Also if a roof does not have proper ventilation shingles can blister because of intense heat.
Hinkle roofing your local roofing contractor discusses what causes asphalt shingles to blister and what you can do about it.
Definition causes impact on roof life of small blisters formed on the surface of asphalt shingles or some asphalt roll roofing products.
Attic ventilation is a major point you should address.
In some cases moisture can get trapped within the shingles during the manufacturing process.
Thermal shock can also cause deformities such as buckled or curled shingles particularly with older shingle roof systems.