Oil Canning Standing Seam | Todd Miller

Oil Canning Standing Seam

July 6, 2009 | Filed under: Misc, Roofing Answers, Roofing Installation

Q: I am currently have a galvalume standing seam roof installed on my home. I am seeing lots of oil canning and asked the installer about it. The metal roof is being installed over shingles using a sharkskin underlayment. I noticed that the crew doing the installation is screwing down the pancake screws as tight as they can and I brought this to the installers attention. He tells me that they can not tell when they are hitting the plywood decking. Can the screws be tightened too tight and can this be the cause of the oilcanning?

Also, on the flashing at the side wall, the flashing was put on top of the siding with a piece of trim board put on top of the flashing and then the trim was caulked with a laytex caulk. Was this done correctly or am I going to have problems with that later down the road?

Should I be seeing the pancake screws coming thru the decking in the attic? I live close to the Texas coast and I am concerned these panels could come off in a hurricane like the one that came thru last year—-Hurricane Ike.

Any help you can give me on this would be greatly appreciated.
Thanks

 

A: Most manufacturers test with screws that penetrate 5/8″ thick decking … most will say it is also acceptable for them to go at least 1″ into thicker decking.

The wall flashing sounds okay … it is nice to remove the siding and flash behind it but in some cases that just isn’t very possible or practical.

Yes, the oilcanning could be caused by over tightening the screws.

todd Miller

has spent his entire career in the metal building products manufacturing industry. He is president of Isaiah Industries, an organization recognized as one of the world’s leading metal roofing manufacturers. Todd is currently Vice President of the MRA (Metal Roofing Association) and a Past Chair of MCA (Metal Construction Association). Through his website, he strives to raise the bar on standards and practices to provide property owners with the best possible products for successful roofing projects.

You may pull quotes from this article provided you include a link back to the original article on this site. You may not reprint this full article, or even a significant amount of the article, without explicit permission. To gain permission, click here.

One response to “Oil Canning Standing Seam”

  1. interesting read.. hope it all goes well

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

how much sign

How Much Does a Metal Roof Cost?

Just ask Todd Miller

Get a straight answer

Before You Call a Roofing Contractor

dial cellphone

Unfortunately, most roofing contractors come in, measure, and simply give you a price. Learn more about what you want and what you need in a new roof, before you invite the contractor into your home. My Roofing Profile Selector is easy to use, and it will help you find the very best roofing solution for you and your home.

Get started