Any roofers?

[91xjgawes]

In the process of building a house... boy what a pain it has been. Cutting the grass at the property today as the sun was setting I glanced at the roof and noticed I can see what appears to be the outline of the plywood, or roof decking. Anyone experience this before? If needed I can post a picture. I guess throughout this whole process I have found myself paying more attention to things I use to not. Thanks for the time.

 

[kmckinnie]

In the process of building a house... boy what a pain it has been. Cutting the grass at the property today as the sun was setting I glanced at the roof and noticed I can see what appears to be the outline of the plywood, or roof decking. Anyone experience this before? If needed I can post a picture. I guess throughout this whole process I have found myself paying more attention to things I use to not. Thanks for the time.

The decking may of been a wafer board. 4x8 sheets. As it was Layed it may of got wet be fore the felt went on. Then the shingles. The edges swelled where water was absorbed. With time heat has made the shingles lay down flatter showing the effect of the wood.
U can see this on many houses when the sun is right to cast the slights difference with shadows.

Your roof is fine.

 

[kmckinnie]

I guess u have the shingles on.

 

[Ugahunter2013]

Roofers are the absolute worst. I finished building a house this time last year. I wouldn’t wish dealing with a roofer on my worst enemy.

 

[mguthrie]

As kmckinnie said the osb got wet. Did you use a 3 tab shingle? It usually doesn’t show if you use an architectural shingle. They are thicker and hide the imperfections. Doesn’t have anything to do with the roofer. Your roof is fine as long as it’s not leaking.

 

[jiminbogart]

You can see OSB print thru and truss/rafter print thru on some houses, depending on the angle of the sun.

I have never seen it be a problem and it may go away once the shingles get good and cooked and lay down.

 

[Oldstick]

I noticed they used a thinner synthetic plastic sheet material instead the tar type felting when they replaced our roof recently. Not sure if that could be a factor too. I was in the back yard staring at a new house right behind us a while back and I could have sworn I saw outlines too. Figured it was my imagination.

 

[westcobbdog]

A solid roofer who I like is Atlanta Roofing Specialists in Marietta. They will come out and do a free inspection. Owners son is top notch, named Daniel.

 

[91xjgawes]

Thanks guys for all the replies. I am attaching 2 pictures.

 

[j_seph]

@cuda67bnl

 

[1gr8bldr]

What happens... When the plywood gets wet, it swells on the edges, compounded by the pressure between 2 pieces butting together, which then cause the plywood to buck. Gravity usually causes it to buck down. A vertical wall will buck both ways. So now the hump of the joint swell is magnified by the dip of the buck downward. The solution on install is not the roofers but the carpenters. Nobody does it, but a space is needed for swell between the butt joints. They likely did it on the horizontal joints because it aids in installation or they used plywood clips. I always hate to see a plywood roof exposed. Always paper it in as soon as laid. Yet, sometimes that task is deferred to the roofer which often is delayed. It don't get better, however, lighting angle magnifies it. And, in your picture, I can see that it's either a late evening or early morning picture which shows it at it's worst. It disappears mid day

 

[jiminbogart]

Nobody does it, but a space is needed for swell between the butt joints.

Wrong. We gap all OSB with a 16 penny nail.

It's a pain because you have to trim every 3rd or 4th sheet.

Some folks still do things the correct way.

 

[91xjgawes]

Wrong. We gap all OSB with a 16 penny nail.

It's a pain because you have to trim every 3rd or 4th sheet.

Some folks still do things the correct way.

Glad to hear you care and that some still care. Throughout this whole process it has been one subcontractor after the next that could just care less. Very frustrating.

 

[91xjgawes]

What happens... When the plywood gets wet, it swells on the edges, compounded by the pressure between 2 pieces butting together, which then cause the plywood to buck. Gravity usually causes it to buck down. A vertical wall will buck both ways. So now the hump of the joint swell is magnified by the dip of the buck downward. The solution on install is not the roofers but the carpenters. Nobody does it, but a space is needed for swell between the butt joints. They likely did it on the horizontal joints because it aids in installation or they used plywood clips. I always hate to see a plywood roof exposed. Always paper it in as soon as laid. Yet, sometimes that task is deferred to the roofer which often is delayed. It don't get better, however, lighting angle magnifies it. And, in your picture, I can see that it's either a late evening or early morning picture which shows it at it's worst. It disappears mid day

Thanks for your reply. Yes this is an evening picture. Looking in the attic, I see the plywood clips on the horizontal edges of plywood like you mentioned. Is this something I should be concerned about or is it aesthetic only? Thank you.

 

[91xjgawes]

A solid roofer who I like is Atlanta Roofing Specialists in Marietta. They will come out and do a free inspection. Owners son is top notch, named Daniel.

thank you sir.

 

[NE GA Pappy]

Looks like you can see raised edges on the picture of the bare plywood, but it could be the painted ends just looking darker. I am glad I built my house back when they used 1/2CD do deck the roof.

 

[1gr8bldr]

Thanks for your reply. Yes this is an evening picture. Looking in the attic, I see the plywood clips on the horizontal edges of plywood like you mentioned. Is this something I should be concerned about or is it aesthetic only? Thank you.

It's aesthetic only. It will not get worse. If you wanted to minimize it's aesthetic look, you could block between the rafters each side of the joints to push up the downward buck but it will not get all of it. You could take a straight edge and see how much the bow is. I only expect 1/8. so blocking has to be precise and lifted before nailed. Now that you have seen it. Notice that it's on lots of houses given the correct lighting

 

[cuda67bnl]

Yep, the joints are telegraphing through the shingles. It’s very common, and as mentioned, most noticeable under certain lighting conditions. There's nothing you can do for it at this point. It will likely become a little less noticeable over time, as the shingles wear, stain, etc. But will still be obvious under certain conditions. You can see the joints in the pic of bare decking. If that pic had shown smooth decking, I’d say you had a lack of proper ventilation. Make sure the ridge is cut out and the felt doesn’t cover the opening at the ridge. That will also cause the joints to be seen, but usually only on super hot days in direct sunlight.

 

[fishfryer]

Looks like you can see raised edges on the picture of the bare plywood, but it could be the painted ends just looking darker. I am glad I built my house back when they used 1/2CD do deck the roof.

Yeah,they used a little "H" shaped clip between sheets.

 

[91xjgawes]

Just to give all of you guys an update.. they are replacing all sheathing and shingles. The pictures did it no justice. After looking at time frames, pictures, etc. they finished sheathing on July 3, and left the osb exposed from that date until July 23rd. During this time we had nearly 3 inches of rain. Thanks for all of the tips and advice. I am glad they are doing the right thing on this ordeal. They knew better.