Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Insulation

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 08-15-2012, 10:04 AM   #1
Newbie
 
Join Date: Aug 2012
Posts: 8
Rewards Points: 0
Share |
Default

Options for my attic


I have blown in cellulose insulation in the attic. I have soffit vents(still without baffles) and 2 roof turbines. I have nothing on the underside of the roof. Which is what I am wondering about. Should I have some form of insulation on the underside of the roof? I think what I worry most about is moisture. If I unblock my soffits and install baffles can I have something between my rafters?

Also, I have high ceilings in part of my home. This creates giant step ups in some areas. The builders or whoever, just used fiberglass bats to cover the step ups. In other words, we have cellulose on the lower level, bats covering the vertical step up and cellulose on the upper level. Would that be a possible "hotspot?"

And just a random question.....Can I cover my insulated AC ducts with extra cellulose to better insulate them? The AC unit in the attic was placed on the far side of the house running ducts all the way across. They also split a duct way too many times(i think). Obviously I have AC problems as well.

bbelmont83 is offline   Reply With Quote
Old 08-15-2012, 10:15 AM   #2
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 26,376
Rewards Points: 80
Default

Options for my attic


You would be far better off with a ridge vent not just those silly vents you have now that do nothing but vent a circle. Ridge vents vent the whole roof.
If you install them the old vents need to go.

Take a look at this zone chart to see if you even have the right amount of insulation.
http://www.energystar.gov/index.cfm?...sulation_table

The attic needs to be air sealed, which simply means sealing up all the holes where lights, ceiling fans, any wiring was run through the plates with spray foam.

Adding insulation to the rafters will do 0 good, I would not suggest it but you would use a reflective barrier instead.

joecaption is offline   Reply With Quote
Old 08-15-2012, 01:15 PM   #3
Member
 
Join Date: Jan 2010
Location: Pennsylvania
Posts: 594
Rewards Points: 0
Default

Options for my attic


Insulate everything else before you put a radiant barrier under the rafters, especially if you're not in zones 1-3. As inexpensive as radiant barrier is now, it still takes a long time to pay for itself unless you are in those zones where you are cooling far more than you are heating. You would think that it would reflect the heat back into the house as well as it keeps it out, but it doesn't-- and it keeps the sunny days from warming up your house.
operagost is offline   Reply With Quote
Old 08-15-2012, 01:29 PM   #4
Newbie
 
Join Date: Aug 2012
Posts: 8
Rewards Points: 0
Default

Options for my attic


The ridge vent was just too much work for me to do at the time. I would have one put in when I have my roof replaced though. The turbines did make a marginal difference though. At least 20 degrees.

Air sealing is probably something that needs to be done though. I have not really looked that closely. But judging by everything else I am guessing it has not been done.

I am unsure of radiant barriers. I have read a buttload on them this year but remain undecided. Maybe if I could see one in real life.
bbelmont83 is offline   Reply With Quote
Old 08-15-2012, 02:57 PM   #5
Exterior Construction
 
Windows on Wash's Avatar
 
Join Date: Aug 2011
Location: VA, MD, DC
Posts: 6,249
Rewards Points: 78
Default

Options for my attic


Unless you have a bunch of HVAC in the attic, radiant barriers are worthless a majority of the time.

They have been shown to be statistically insignificant once you have a decent R-Value.
Windows on Wash is online now   Reply With Quote
Old 08-15-2012, 04:15 PM   #6
Newbie
 
Join Date: Aug 2012
Posts: 8
Rewards Points: 0
Default

Options for my attic


I do have a bunch. All of my ducting which runs all the way across the house. The unit is on the far side of the house.

How about longevity of cellulose? I'm guessing it's the original insulation from 92. I'll take a pic in a minute.
bbelmont83 is offline   Reply With Quote
Old 08-15-2012, 06:23 PM   #7
Newbie
 
Join Date: Aug 2012
Posts: 8
Rewards Points: 0
Default

Options for my attic


Ok so a quick couple of pics. Right off the bat I found an area with no insulation however that's over the front porch. The other area is the ac unit which is in a bad spot.
bbelmont83 is offline   Reply With Quote
Old 08-15-2012, 06:26 PM   #8
Newbie
 
Join Date: Aug 2012
Posts: 8
Rewards Points: 0
Default

Options for my attic


Quote:
Originally Posted by bbelmont83
Ok so a quick couple of pics. Right off the bat I found an area with no insulation however that's over the front porch. The other area is the ac unit which is in a bad spot.
Almost forgot pictures....
Attached Thumbnails
Options for my attic-image-2221255106.jpg   Options for my attic-image-229812988.jpg   Options for my attic-image-369642207.jpg   Options for my attic-image-3046393006.jpg   Options for my attic-image-3544948018.jpg  

bbelmont83 is offline   Reply With Quote
Old 08-15-2012, 06:31 PM   #9
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 26,376
Rewards Points: 80
Default

Options for my attic


What a mess there's areas with 0 insulation, the rest looks way under insulated.
joecaption is offline   Reply With Quote
Old 08-15-2012, 07:16 PM   #10
Newbie
 
Join Date: Aug 2012
Posts: 8
Rewards Points: 0
Default

Options for my attic


Ya tell me about it. I've always hated it and should have done something sooner. Anyway, there is zero insulation above the front porch in the picture and above the garage. I believe I'll start working on this bit by bit. Maybe I can post a video on YouTube of the whole attic to let you guys see how bad it all is.
bbelmont83 is offline   Reply With Quote
Old 08-15-2012, 07:33 PM   #11
Member
 
Join Date: Oct 2011
Location: Ohio
Posts: 2,546
Rewards Points: 0
Default

Options for my attic


Does look underinsulated in spots. You could roll out the unfaced batt insulation perpendicular to the joists
Attached Thumbnails
Options for my attic-100_5533.jpg   Options for my attic-22222222.jpg  
hammerlane is offline   Reply With Quote
Old 08-16-2012, 07:32 AM   #12
Exterior Construction
 
Windows on Wash's Avatar
 
Join Date: Aug 2011
Location: VA, MD, DC
Posts: 6,249
Rewards Points: 78
Default

Options for my attic


The area above the front porch (assuming that it is exterior space) does not require insulation.

Air seal and insulate.

Cut the straps on the ductwork down so they are tight to the floor, air seal all the top plates, penetrations, etc, loose blow additional insulation over the ductwork and blow it all up to and R-50.
Windows on Wash is online now   Reply With Quote
Old 08-16-2012, 07:32 AM   #13
Exterior Construction
 
Windows on Wash's Avatar
 
Join Date: Aug 2011
Location: VA, MD, DC
Posts: 6,249
Rewards Points: 78
Default

Options for my attic


Wrap the exposed ductwork with more fiberglass is you want to as well (un-faced).
Windows on Wash is online now   Reply With Quote
Old 08-16-2012, 08:30 AM   #14
Newbie
 
Join Date: Aug 2012
Posts: 8
Rewards Points: 0
Default

Options for my attic


Thanks for the suggestions. The porch is exterior space. I also took video if anyone is interested. It shows more of the attic.

bbelmont83 is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Attic Insulation tim1218 Insulation 4 09-07-2011 10:18 AM
Attic project - Would like opinions whataboutj Insulation 6 06-29-2011 03:07 PM
Attic venting questions lemmy Roofing/Siding 36 05-28-2011 08:14 PM
Options for attic ventilation hi4head Roofing/Siding 1 10-29-2010 01:04 PM
Attic Fan AND Whole House Fan PapaGnome HVAC 6 02-15-2009 02:28 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.