New Roof Has Ripples In It

I had my shingle roof replaced a couple of weeks ago using 25 year shingles and 30 lb.

New roof has ripples in it.

When some of the crowns are up and some are down then the roof has a wavy look but it is still structurally sound. If your roof has ripples you should be concerned. Possibly the deck wasn t dry and that has limited adhesion. They were about every 8 ft along the roof line on the one side of the house.

The shingles on your roof serve a dual purpose. As to the extent of it you ll need a professional to come take a look but don t get your hopes up. I found these ripples on the roof line and can not figure out what would have caused them. This is a new install on a 20 year old house.

They used peal and stick underlayment. Epdm is heavy stuff it wants to lie flat and doesn t need much encouragement with a broom to do so. Lumpy bumpy or curling shingles that do not. Should the roof have so many ripples.

Speaking as a talented amateur i did my first ever epdm flat roof last year 20 sq m irregular shape it had no ripples then and it has no ripples now. Poor framing practice is one of the more common reasons for roof waviness. You could see some unevenness in the old shingle roof. The most likely culprit is that your roof decking has been damaged.

Anyone have any ideas or seem this before. Rippled shingles can quickly over time lead to a leaking roof. 3 yr old hip roof. They were right at the edge above the soffit area and just a couple of feet long.

The carpenter may have failed to put all of the crowns up on site framed roofs. 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. They give the roof a finished look while forming a protective seal. 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.

I m concerned they over tightened the screws or the material is not correct. Roof shingles are not lying flat. Ripples can also expose the wooden portions of the roof to moisture that could lead to deterioration as well as rotting. Contractor stated it was normal because no roof is completely flat.