Why does this roof look wavey??? - Contractor Talk - Professional Construction and Remodeling Forum

willigsxr · 06-05-2006, 06:54 PM

I had a contractor roof my house and the finished product looks wavey. Why does this look wavey and should I be concerned about it? Here is a pic of the roof.

ApgarNJ · 06-05-2006, 07:15 PM

I would say that the plywood on the house isn't perfectly flat. plus, it takes a while for shingles to adhere to the one underneath and lay completely flat. with three tab shingles, they won't always look perfect on older houses that may have old framing, that is sagged or plywood that is far from perfect.

give it some time for the shingles to lay down flatter.

**joasis** · 06-05-2006, 07:31 PM

We would need to see a few before pictures to have a better idea. How many layers were stripped before the new roof was put on?

River Rat Dad · 06-05-2006, 08:18 PM

Based on the flashing of that plumbing stack I would be concerned about the quality of the job in general.....

maj · 06-05-2006, 08:38 PM

Looks to me like the felt paper was "bubblely" when they layed the shingles. Sometimes if the felt is cold or wet it will not lay flat. Then if the shingles are nailed down the felt will hold up the shingles. Most likely it will lay down once it gets some heat.

joedonuts · 06-05-2006, 08:54 PM

I have had ripply felt paper that gave a roof this type of look, and it's true that vent stack is a problem.

**joasis** · 06-05-2006, 09:47 PM

I obviously missed that stack the first time....since the "wave" appears to me to run with the rafters, I bet it is in the decking/rafters...some have settled a little....

**Cole** · 06-05-2006, 09:51 PM

Thats one reason why I hate 3 tab shingles.

747 · 06-05-2006, 10:51 PM

Its a half ass job in my oppion.

River Rat Dad · 06-06-2006, 06:20 AM

and the other half of the ass didn't show up for work that day, nursing the brown bottle flu no doubt...

**AtlanticWBConst** · 06-06-2006, 05:04 PM

Quote:

Originally Posted by River Rat Dad

and the other half of the ass didn't show up for work that day, nursing the brown bottle flu no doubt...

MJW · 06-06-2006, 05:30 PM

Besides everything stated already. It looks like the nails might be too high and/or crooked. Go up and take a look. I have to ask, was this guy the cheapest bid or does he do roofs for you alot?

alaska8515 · 06-07-2006, 09:41 PM

I have seen roofs look a little wavy from the hooks the roofers slide under the shingles to support the boards to help them stop from sliding off the roof. (Not a roofer so not sure what they are called) After a couple of sunny days hey flattened back down.

Would like to see a couple of closer up pics of the vent stack. I will hold judgement til then.

Grumpy · 06-08-2006, 08:46 AM

The problem is you had a contractor do it, and not a ROOFER.

It could be any number of reasons discussed above, but it doesn't look overly wavy IMO. Good call on the pipe River. First off I wouldn;t have used a flashing like that, I only use leads, and secondly the boot isn't even properly installed.

willigsxr · 06-09-2006, 04:41 PM

I had confronted the builder and they stated that there is nothing wrong with the roof including the flashing on the pipe. There were several other issues with the house and I have deceide to not take the house at this time. If you know anyone considering building with this builder please have them contact me and I will send pics and stories with the lack of skill used on when they built this house. Also the radon level on the site was off the scale and the builder would not work with me on installing a radon system prior to moving in. I could feel the cancer just standing in the living room!!!!

Thanks to all that repiled to my post!!!

IHI · 06-09-2006, 09:48 PM

Kinda late but I'll still pipe in

Pipe flashing=bad. definately needs addressed

The eaves being raised/wavey are very commonly scene from hacks that dont know how to install the starter strip (as well as all the other symptoms the other's described above with felt needing heat) but often if they used the rolls of starter strip and dont get it laid perfectly square the starter strip itself will buckle up and look identical to what your seeing there in the 2nd picture. Only cure is to lift the shingles in the bad area and cut the starter strip to straighten it back out. it should be laid flat like this - but often when they're in a hurry it'll get laid like this (v) so you need to make a cut to get rid of the bind to make it do lay striaght again like this (-)

Hopefully it's just a wavey felt paper issue, but being that low on the eaves there should be no felt paper at all-just ice barrier and starter strip so the wavey/buckled eave points to bad starter strip installation.

I cant really make alot of detail out in pic one...would need an angled picture to get the full effect, but would assume 1 of 2 things with wavey roof. older too thin roof sheeting in the CDX class that has delaminated and sunk into the voids between the rafters/trusses or the wavey felt paper.

I dont know, just my two pennies. Either way a call back and fixes need to be done asap on the flashing and to get the eaves to lay flat otherwise your asking for trouble.

gutts-1 · 06-22-2006, 06:56 PM

guys do not forget about that drip edge . you know we've talked about it.... we'd have to flash that for sure, if they were not going to put gutters on that house is the water supossed to drip off the bottom of the fasia board ?? ha ha

Grumpy · 06-22-2006, 09:55 PM

I saw the absolute worst new roof I have ever seen. We are installing solar panels on some new roofs. These shingles are ALL high nailed. The nails are not in the right places horizontally and you'd be damned to find a shingle with more than 3 nails, though most of them have only 2. The shingles were literally slipping underfoot (9/12). Then oddly, we'd lift a shingle and find 16, yes 16, nails all in one bunch like a spot the size of 3 square inches.

The definetly did not chalk any lines horizontally or vertically since nothing is even, everything is wavy... Also they cut an 8" hole for a 4" HVAC flue pipe and asked me to flash it (I lauged). Ok now I described the roof, and imagine the rest of the house. The siding was tight nailed, they sided over a door. Oh they sealed the foundation and back filled immediately before it had a chance to dry and they didn't use any sort of clean fill, but did use what ever construction debris was on the job site (beer bottles, pieces of wood, chunks of old concrete and brick from previous demo).

minnesotaroofin · 08-04-2006, 10:53 PM

I think IHI hit the nail on the head look at the fascia staining from the Ice and water shield the starter course is not installed properly. water is already geting under that first row and causing the Bleed effect off the Ice and water shield. should still have at least 1/2 inch overhang past the d -edge. also poor install on d -edge could be causing some of the humps. 2 over 2 under standard flashing for pipe looks like 3 1/2 under 1/2 over.

indm45 · 08-05-2006, 01:49 PM

i have to agree with the playwood,seems to b2 3/8,that has at least 3 layers and the proper method of cutting the first 2 courses wasn,t used. this roof should have been tore-off and psssibally new new decking. but you have to go with what the homeowner is willing to spend,simply put no warranty here, maybe a 5-5, 5 minutes off the roof and 5 miles down the road.