Ripple In Roof

While checking out the roof for an additional a c unit install i noticed some side to side ripples in the rubber covering.

Ripple in roof.

Looks like its the sheathing due to the fact that the ripples look to be about 8 feet apart. Btw camping world their dealer states a new roof is warranted. Keystone says it s normal nothing wrong. In the direction you are laying.

If they used tar paper as an underlayment and left it over night with out shingling it that could be the cause as well. Ripples can also expose the wooden portions of the roof to moisture that could lead to deterioration as well as rotting. If your roof has ripples you should be concerned. Heavy weight felt paper installed with ripples in it will reflect in the shingles over time.

Roofs buckle because either the roofing underlayment has wrinkled or the wood deck itself has shifted for some reason. 2019 montana hc 373rd purchased april 2019 yes only 15 months old. These ripples or waves could be picked up off the solid roof and it was apparent that the covering was not glued down at all. However if this is the problem than the existing roof would have shown the same waves it would be god for your case if you had recent photos of the roof proving this was not the case.

Plesieur paul lesieur cmi april 29 2014 10 02pm 8. Rippled shingles can quickly over time lead to a leaking roof. This could be a sign of a bigger problem in the future. Over night the paper will ripple with temperature change.

Keystone states that ripples in roof is not a defect and won t cover repair. What do you think. They come in the morning and shingle over the ripples they will always show. The imperfections this creates in your roof are just magnified as soon as you place yet another layer on top of that along with the predictable result being that you grab ripples and ridges.

Occasionally the buckling is caused by poor workmanship wrong materials or possibly by a problem with the structure itself. Those are usually but not always caused by tarpaper getting wet shingled and then the gas from evaporation causes the buckles.