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: 204

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

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.

Latest Activity

Larry Gorman posted a discussion

Hobo Data loggers for sale

I have recently retired and no longer have need of these, which are all in like new condition.  I…See More
29 minutes ago
Laurel Elam posted a blog post

Over 146,000 Homes in the U.S. were HERS Rated and issued a HERS Index Score in 2014

In 2014 there were 146,860 homes in the United States that were energy rated by certified RESNET…See More
58 minutes ago
Shashank Kirloskar posted a blog post

Top 8 Solar Panel Manufacturers in India

Non-Renewable resources are reducing rapidly. Powering homes and offices through other means,…See More
11 hours ago
Avi Yashchin posted a blog post
12 hours ago
Laura Langham posted an event
Thumbnail

Residential Home Energy Efficiency Workshop - Greensboro, NC at Kathleen Clay Edwards Library – 1420 Price Park Drive, Greensboro, N.C. 27410

March 3, 2015 from 6:30pm to 8pm
Free Home Energy Conservation Workshop: Greensboro – 3/5/15Register for the Greensboro workshop…See More
18 hours ago
EnergyLogic Academy posted an event
Thumbnail

RESNET Rater Training Phase II at Denver, CO

May 11, 2015 to May 14, 2015
Join us in Beautiful Denver, CO!The field portion of HERS Rater Training is 4 days of field…See More
18 hours ago
Jim Gunshinan replied to Jim Gunshinan's discussion When your shower is in your kitchen...
"With more and more builders in crowded, expensive-to-rent-in cities like New York creating…"
18 hours ago
Home Energy Magazine's blog post was featured
18 hours ago

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service