EcoRenovator  

Go Back   EcoRenovator > Improvements > Renovations & New Construction
Advanced Search
 


Blog Register 60+ Home Energy Saving Tips Recent Posts Search Today's Posts Mark Forums Read


Reply
 
Thread Tools Display Modes
Old 05-22-14, 11:46 AM   #1
Daox
Administrator
 
Daox's Avatar
 
Join Date: Aug 2008
Location: Germantown, WI
Posts: 5,482
Thanks: 1,117
Thanked 370 Times in 301 Posts
Default White Roofs and Surfaces Overlooked Key to Reducing Global Warming



Here we have a good article that quantifies some of the savings that can be had by switching to a lighter colored roof.

White Roofs and Surfaces Overlooked Key to Reducing Global Warming

Quote:
The moral of the science is simple. One can make a bigger contribution to reduced global warming by increasing all your structures' albedo. "If all human structures improved reflectivity by 50%, it would have an effect equal to everyone on earth using no fuels for energy for a year. A year. There is no bigger, more straightforward, or economical contribution each of us can make."

Attached Thumbnails
Click image for larger version

Name:	roofcolor.jpg
Views:	994
Size:	28.0 KB
ID:	4387  
__________________
Current project -
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
&
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Daox is offline   Reply With Quote
Old 05-22-14, 04:19 PM   #2
stevehull
Steve Hull
 
Join Date: Dec 2012
Location: hilly, tree covered Arcadia, OK USA
Posts: 829
Thanks: 241
Thanked 165 Times in 123 Posts
Default

I agree that we all need more albedo; especially an increase in 50%. Does that increase require any special pills?

Steve
__________________
consulting on geothermal heating/cooling & rational energy use since 1990
stevehull is offline   Reply With Quote
Old 05-24-14, 01:06 AM   #3
jeff88
Lots of questions
 
Join Date: Aug 2013
Location: San Jose, CA
Posts: 72
Thanks: 27
Thanked 2 Times in 2 Posts
Default

I like the idea of having a white roof, however, there have been studies about the increase in global temperatures even though there is a localized cooling effect (the interior of the structure).

White Roofs May Actually Add to Global Warming
The Easy Fix That Isn’t: White Roofs May Increase Global Warming

Don't get me wrong, I like the idea, but maybe (just maybe) it's not the best answer. Installing solar (thermal or PV) can also have a similar localized cooling effect (from the shade it provides and the air flow underneath). A "green" roof comprised of plants would also work extremely well, not to mention provide a nice garden, maybe even some veggies!
jeff88 is offline   Reply With Quote
Old 11-25-14, 11:38 AM   #4
Servicetech
Apprentice EcoRenovator
 
Servicetech's Avatar
 
Join Date: Nov 2013
Location: Moore Oklahoma
Posts: 267
Thanks: 108
Thanked 23 Times in 21 Posts
Default

How about White shingles and White metal roofs? No special coatings, just color.
Servicetech is offline   Reply With Quote
Old 11-25-14, 03:20 PM   #5
Daox
Administrator
 
Daox's Avatar
 
Join Date: Aug 2008
Location: Germantown, WI
Posts: 5,482
Thanks: 1,117
Thanked 370 Times in 301 Posts
Default

I'd say it has a similar effect. However, some metal roofing has special reflective paint which can further reduce the solar heat gain on the roof.
__________________
Current project -
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
&
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Daox is offline   Reply With Quote
Old 11-29-14, 12:06 PM   #6
buffalobillpatrick
Master EcoRenovator
 
Join Date: Mar 2014
Location: Florissant, Colorado
Posts: 599
Thanks: 814
Thanked 58 Times in 54 Posts
Default

Only effective in climate zones where people want/need A/C

We don't all live there, I don't.

I'm in climate zone 5, close to 6, at HIGH altitude (8,500') & dry.

My dark green steel roof is a good balance here.

buffalobillpatrick is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 08:36 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Ad Management by RedTyger
Inactive Reminders By Icora Web Design