Which is why the roof looks wavy after the roofers finished.
Wavy roof sheathing.
Usually sheathing is made from osb or plywood and it is manufactured by laminating thin veneer strips or wood fibers under pressure.
To avoid having a wavy roof use a licensed roofer and not just a.
Quality of the roofing work in general can also cause a roof to look wavy.
Tuftex multi wall 6mm panel clear 4 ft x 8 ft corrugated clear polycarbonate plastic roof panel.
But the roof rafters and thus its surface had sagged badly enough to be noticeable from outdoors as a rather wavy roof.
Ultimately there is no single answer for why a roof may look wavy but could be a combination of factors.
The problem is not the roofers but the fact that your sheathing.
While a wavy roof is aesthetically unpleasing does it affect the performance of the roof.
Not sure if that s the right technical term i didn t realy notice it before tearing off the shingles but some of the sheathing is a little wavy.
When a homes foundation shifts is not level or damaged then the foundation issues may be reflected by a sagging bowed or wavy roof.
From that low resolution photo it appears that the lines trace the ends of the osb panels the 4 foot ends of the panels and not particularly the truss lines.
I m going to replace at least two boards.
Osb roof sheathing wavy with truss lines visible the third photo is more telling than the other two photos.
Potentially it could be caused if the shingles were not properly aligned or not nailed fully.
Tuftex polycarb 2 17 ft x 12 ft corrugated gray polycarbonate plastic roof panel.
Roofs may become wavy over time or they may be built that way to start with.
For pricing and availability.
Most that become wavy do so over time.
It immediately detracts from the appeal and look of a home.
Is there a rule of thumb on when you recommend replacing it.
Wavy or sagging roofs can be a warning sign that there are foundation problems with a house however there are a number of other reasons for a roof to sag or be wavy as well.
We will highlight the 4 main causes of a wavy or warped roof.
The waviness generally does not cause a roof to leak but it may be architecturally unsightly or occasionally can indicate a problem.
A roof can only be as good as its roof deck and your roof sheathing is the sheet material which forms the surface that the shingles are nailed to.
When also combined with thin 1 4 plywood or 3 8 thick roof sheathing we also sometimes find sagging even between rafters.
The original rafters of this home had not become disconnected at the ridge nor at the top plate.
To determine if a wavy roof is more than just an eye sore you must determine the reason for the wave.
The old shingled roof was just removed and new shingles installed.
