Wavy Roof Sheathing

When a homes foundation shifts is not level or damaged then the foundation issues may be reflected by a sagging bowed or wavy roof.

Wavy roof sheathing.

Poor framing practice is one of the. The waviness generally does not cause a roof to leak but it may be architecturally unsightly or occasionally can indicate a problem. To avoid having a wavy roof use a licensed roofer and not just a. Tuftex multi wall 6mm panel clear 4 ft x 8 ft corrugated clear polycarbonate plastic roof panel.

Tuftex polycarb 2 17 ft x 12 ft corrugated gray polycarbonate plastic roof panel. A wavy roof is an unsightly thing. While a wavy roof is aesthetically unpleasing does it affect the performance of the roof. 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.

I m going to replace at least two boards. Most that become wavy do so over time. Usually sheathing is made from osb or plywood and it is manufactured by laminating thin veneer strips or wood fibers under pressure. To determine if a wavy roof is more than just an eye sore you must determine the reason for the wave.

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. Which is why the roof looks wavy after the roofers finished. For pricing and availability. Quality of the roofing work in general can also cause a roof to look wavy.

Roofs may become wavy over time or they may be built that way to start with. We will highlight the 4 main causes of a wavy or warped roof. Ultimately there is no single answer for why a roof may look wavy but could be a combination of factors. Potentially it could be caused if the shingles were not properly aligned or not nailed fully.

The original rafters of this home had not become disconnected at the ridge nor at the top plate. When also combined with thin 1 4 plywood or 3 8 thick roof sheathing we also sometimes find sagging even between rafters. 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. It immediately detracts from the appeal and look of a home.

The problem is not the roofers but the fact that your sheathing. Osb roof sheathing wavy with truss lines visible the third photo is more telling than the other two photos. Is there a rule of thumb on when you recommend replacing it. For instance put a straight edge on it and if you find a 1 2 dip then replace it.