New Roof Has Ripples In It

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.

New roof has ripples in it.

They were about every 8 ft along the roof line on the one side of the house. If your roof has ripples you should be concerned. 3 yr old hip roof. Lumpy bumpy or curling shingles that do not.

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. I could see nothing from the attic as the insulation baffles covered the area in all. Possibly the deck wasn t dry and that has limited adhesion. When some of the crowns are up and some are down then the roof has a wavy look but it is still structurally sound.

Ripples can also expose the wooden portions of the roof to moisture that could lead to deterioration as well as rotting. Should the roof have so many ripples. I had my shingle roof replaced a couple of weeks ago using 25 year shingles and 30 lb. 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.

Contractor stated it was normal because no roof is completely flat. This could be a sign of a bigger problem in the future. Anyone have any ideas or seem this before. The shingles on your roof serve a dual purpose.

You could see some unevenness in the old shingle roof. I m concerned they over tightened the screws or the material is not correct. As to the extent of it you ll need a professional to come take a look but don t get your hopes up. The most likely culprit is that your roof decking has been damaged.

Roof shingles are not lying flat. Rippled shingles can quickly over time lead to a leaking roof. The carpenter may have failed to put all of the crowns up on site framed roofs. Poor framing practice is one of the more common reasons for roof waviness.

They give the roof a finished look while forming a protective seal. One can see clearly lots of ripples bumps all over the roof but one section is much worse than the rest. Epdm is heavy stuff it wants to lie flat and doesn t need much encouragement with a broom to do so. They used peal and stick underlayment.