Poor framing practice is one of the more common reasons for roof waviness.
Fixing waves in roof.
Here are some common causes.
When some of the crowns are up and some are.
In some instances you could also end up with a water leak in the roof which does compromise the structure and integrity of your roof.
Force the mold away from the roofing a few inches at a time then lift off the entire piece in one section.
Starting at one corner of the roof wedge a pry bar into the narrow space at the top of the shingle mold the thin wooden strip that sits just below the shingles.
A roof should look smooth if it is in good condition.
A structurally sound houston roof will protect your house and possessions from rainwater or melting snow that has accumulated during the winter months.
As to the extent of it you ll need a professional to come take a look but don t get your hopes up.
I e the original roof was a light wood shingle roof and the new replacement roof is a concrete tile roof weighing 5 or 10 times more than the original roof.
First layer of shingles were wavy and the roofer laid directly over the existing layer.
Causes of a wavy roof.
The carpenter may have failed to put all of the crowns up on site framed roofs.
Other times it will require costly repairs to correct the issue.
If a roof has been re roofed with heavier roofing material than the original roof was engineered for.
Any amount of decking damage can result in a pronounced wave so the problem could be tiny but in most cases bad or rotted decking is going to mean extensive roof service and potentially roof replacement.
Hold onto the old shingle mold if it looks to be in good shape.
Thankfully this is something that can.
Then the beam or roof may sag.
The felt paper used on the decking was potentially wet or bubbly when laid down.
This is a bad move a roofing.
Ripples or waves on the roof surface are a sure sign that the shingles or decking has probably buckled.
The waviness generally does not cause a roof to leak but it may be architecturally unsightly or occasionally can indicate a problem.
In some instances the shingles will seemingly fix themselves almost like magic.
If you can get at the underside of the roof from the attic you can install 2x4 blocking to push the plywood up where it is dipping to help straighten it out.
These would include your roof s age the temperature and weather conditions and the overall roof condition.