Ballasted roofs. How prevalent and how effective at energy efficiency are they?

I dont see a whole lot of these in my area.  Until recently I did not realize that they can be designed to meet 'Cool Roof'. specifications.

 

How many of these do you see in your area?  These are extremely heavy roofs with that much rock.

Views: 246

Reply to This

Replies to This Discussion

Found at the link Hal provided:  "A typical ballasted roof system consists of 10 pounds per square foot (49 kg/m2) of river-rock ballast over an EPDM membrane, rigid insulation and a metal roof deck."
I haven't seen one in years, generally we busy ripping them up & replacing them due to leaks & deterioration - personally I rather see a layer of insulation & a coating, and so would the owners when it comes time to repair or replace it

I agree with you.  I can't remember how long it has been since I have seen one even getting replaced.

 

Here we have the DOE setting standards for ballasted roofs so they can be considered a 'Cool Roof' also along with all the other types of roofs..  This would surely be considered a good thing if it is more energy efficient than a ballasted roof without the coating.  However, ( and speaking only for our roof coating)  there is absolutely NO WAY we would ever give a warranty for this specific application.  Rocks on top of our coating would not phase it's performance in the cold months but would definitrly drop its effectiveness in the hot months.

Spoke to the inventor of our coating yesterday.  He has not seen a ballasted roof in at least 20-years.

Anyone have any ideas where they are still used?????

Apperently ballasted roofs are still used in the UK and other parts of Europe as well as a few areas in the US.  News to me!

RSS

Latest Activity

Jonathan Beers posted a discussion

MGE hiring for my job

I'm retiring next spring, and MGE is hiring:…See More
12 hours ago
Summer Reyes's blog post was featured

Equipment We Use: Detecting Water With Infrared Cameras

You know water is somewhere on the property, you can smell the mildew, but can't determine the…See More
14 hours ago
Profile IconGlenn Hourahan and Joseph Frasier joined Home Energy Pros Forum
14 hours ago
Alfredo Baccari added a discussion to the group Job Board
Thumbnail

HERS or/and BPI Energy Inspector in SF Bay Area (SAN JOSE, CA).

ELEM3NTS is a leading energy efficient consulting company specializing in residential homes. We…See More
15 hours ago
Alfredo Baccari joined Diane Chojnowski's group
Thumbnail

Job Board

This group is for posting jobs related to all aspects of the home performance industry including…See More
16 hours ago
David Byrnes's blog post was featured

Strategies for Hiring and Interviewing for Home Performance Professionals

Hire slow and fire fast.  It’s a phrase that experienced managers and human resources professionals…See More
18 hours ago
Dara Bowser replied to Don Fugler's discussion joining ducts in the group HVAC
"Good to hear you have clean dryer ducts Don. The dryer duct issues that we run into are…"
yesterday
Don Fugler replied to Don Fugler's discussion joining ducts in the group HVAC
"David, If the IMC mandates metal dryer duct and prohibits metal screws, they must be accepting…"
yesterday

Photos

  • Add Photos
  • View All

© 2017   Created by Home Performance Coalition (HPC)   Powered by

Badges  |  Report an Issue  |  Terms of Service