EcoRenovator  

Go Back   EcoRenovator > Off Topic > The Billiards Room
Advanced Search
 


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


Reply
 
Thread Tools Display Modes
Old 11-19-14, 04:50 PM   #1
lt190b
Lurking Renovator
 
Join Date: Mar 2010
Posts: 24
Thanks: 0
Thanked 2 Times in 2 Posts
Default roof frost

Is frost on the outside of a roof a good sign or a bad sign? lt190b

lt190b is offline   Reply With Quote
Old 11-20-14, 12:11 AM   #2
wuck
Helper EcoRenovator
 
Join Date: Nov 2013
Location: Sonoma County NorCal
Posts: 32
Thanks: 6
Thanked 5 Times in 5 Posts
Default

Bad, Bad. It means you'll have to scrape frost off your windshield before driving to work.

Pat
wuck is offline   Reply With Quote
Old 11-20-14, 10:15 AM   #3
Higgy
The Gardener
 
Join Date: Oct 2008
Location: Manitoba - Canada
Posts: 492
Thanks: 17
Thanked 8 Times in 7 Posts
Default

Only if you leave your car outside Pat.

LT, frost is just frost. If you get snow where you live, snow on your roof or melting off your roof when it's cold out, is more an indicator of whether something is wrong with your house or not...specifically the insulation in your attic.
Higgy is offline   Reply With Quote
Old 11-20-14, 12:31 PM   #4
MN Renovator
Less usage=Cheaper bills
 
MN Renovator's Avatar
 
Join Date: Nov 2010
Location: Minneapolis, MN
Posts: 939
Thanks: 41
Thanked 116 Times in 90 Posts
Default

It doesn't mean much. Your roof is at or below the frost point temperature and there is moisture in the air. Like wuck said, it's likely to happen when cars parked outside overnight are also covered in a layer of frost. That kind of frost is a pain to scrape off the car too.
MN Renovator is offline   Reply With Quote
Old 11-23-14, 05:12 PM   #5
herlichka
Apprentice EcoRenovator
 
Join Date: Oct 2010
Location: Simcoe County, Ontario, Canada
Posts: 102
Thanks: 11
Thanked 15 Times in 10 Posts
Default

It's actually a good sign- it means your roof is cold! If there's frost on your lawn and your roof is damp it means your house is losing heat. Assuming, of course, that the sun's first rays aren't shining on your shingles.
herlichka is offline   Reply With Quote
Old 11-23-14, 05:48 PM   #6
lt190b
Lurking Renovator
 
Join Date: Mar 2010
Posts: 24
Thanks: 0
Thanked 2 Times in 2 Posts
Default

Thanks to all for the replys. Frost on the roof, an even cover no melted spots would mean little to no heat leak from the house. Correct? lt190b
lt190b is offline   Reply With Quote
Old 11-23-14, 08:24 PM   #7
AC_Hacker
Supreme EcoRenovator
 
AC_Hacker's Avatar
 
Join Date: Mar 2009
Location: Portland, OR
Posts: 4,002
Thanks: 303
Thanked 712 Times in 532 Posts
Default

Quote:
Originally Posted by lt190b View Post
Thanks to all for the replys. Frost on the roof, an even cover no melted spots would mean little to no heat leak from the house. Correct? lt190b
There are always heat leaks, our job is to slow them down as much as possible.

If the heat leaks are severe, you see the melting, as was mentioned.

If the leaks are slower, you may not see frost melting on the roof... doesn't mean no heat is leaking.

Having a nice even frost as you described suggests that insulation has been uniformly installed.

At some point the frost will melt, which will be a good time to check the roof for uneven melting patterns.

-AC

__________________
I'm not an HVAC technician. In fact, I'm barely even a hacker...
AC_Hacker 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 04:10 AM.


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