Strapping or No Strapping | Todd Miller

Strapping or No Strapping

June 12, 2009 | Filed under: Battens or No Battens, Misc, Roofing Answers, Roofing Installation

Question from June in New Hampshire:
Q: Greetings: – We are in the process of contacting contractors regarding the installation of a metal roof on our home and with each contractor that comes to the house we are getting more and more confused:

1. Should it be installed over the existing asphalt or strapping
2. Standing double locking seam- Does this tend to sweat on top of asphalt shingles?- one contractor states yes – the other recommends using it?

My response:
A: Thanks for investigating metal.

1) Some products CAN be installed on strapping. Very few MUST be installed on strapping. Most products CAN or MUST be installed on solid deck. If you currently lack attic ventilation and have difficulty achieving it then there is good reason to consider strapping but you must choose an appropriate product and you may wish to install vertical strapping followed by horizontal and then actively venting the resulting chamber.

2) A double lock panel should not pose any special issues in comparison to other styles.

I hope this helps some. If you have special circumstances that need to be considered please let me know.

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.

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Your email address will not be published.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

Thinking about a new roof?

How To Buy A Metal Roof eBook cover

Educate yourself for a better experience when buying a new roof

This comprehensive eBook includes everything you'll need from "choosing a manufacturer" to a "metal roofing checklist," and is sure to be a great tool for helping you make the best investment in you home’s protection.

Get your copy!