September 2011

A better choice

A better choice not ratednot ratednot ratednot ratednot rated

Consider a new roof system when installing a roof-mounted PV system

by James R. Kirby, AIA
Be the first to comment

Interest in site-specific electricity generation has increased significantly during the past few years through federal and local incentives and an increased demand for energy efficiency and reduced energy costs. And one way to achieve site-specific electricity generation is through roof-mounted photovoltaic (PV) system installations.

PV modules on a residence often occupy a small percentage of the roof area.

However, homeowners and building owners who are interested in rooftop electricity generation often overlook the need for an appropriate substrate that will provide equivalent service life for the roof-mounted PV system. Many existing roof systems are not adequate to provide a substrate for the expected life of roof-mounted PV modules, which could last as long as 30 years.

A typical roof system may not be designed to take the abuses inherent with the installation of rooftop equipment of any kind. Worker traffic, using the roof surface as a work platform, additional load on the roof structure, drainage and the possibility of ponding water are concerns when adding any type of rooftop equipment. When a roof-mounted PV system is installed, these same concerns need to be assessed and resolved appropriately on a project-by-project basis. In addition, there are concerns specific to PV system installation that...

To read the article in its entirety, please log in or register (registration is free).

Log in or register for FREE access to this article and other Professional Roofing online content.

Not a user?

Register now for free access
  • Full access to every article
  • Online Web exclusive information
  • Photo gallery
  • Breaking news
  • Online classified ads

Already a user?

Log in now

User name:



Login help
Click here to have your user name and password emailed to you.

Comments (0) Login to post a comment or rating
There are no comments posted.