DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Insulation and Radiant Barriers > attic remodel insulation




Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old 10-24-2009, 08:14 AM  
peter_cottontail
Junior Member
 
Join Date: Oct 2009
Posts: 2
Default attic remodel insulation

Greetings! I'm new to the forum and I'm trying to find help with a question I haven't been able to answer on the net. I'm thinking/wanting to remodel my unfinished attic to make living space out of it. Right now it's insulated on the floor with gable vent and vented soffits. I know that I have to insulate the rafter space with baffles and seeing as though the soffits are vented already I'd like to just put a ridge vent in. However, my rafters are 2x6's and I cant afford to waste head space by increasing the depth. I live in Minnesota, so I know that R-value is a premium here. I read somewhere that 6" of fiberglass insulation is only an R-value of 19? Is that true? And if so, what's my best bet to get a higher R-value without compromising the headroom. I was thinking the blown in closed cell foam insulation, but does anyone have a rough idea what that costs? Also, I read that if I do go with that type of insulation, venting isn't necessary though I can't imagine that to be true. Anyways, as you can see I'm in the beginning stages of this project, but I figure planning the insulation to be the best start. Any help is greatly appreciated!



__________________
peter_cottontail is offline  
 
Reply With Quote Quick reply to this message
Old 10-24-2009, 07:26 PM  
inspectorD
Housebroken
HRT_MODERATOR.png
 
inspectorD's Avatar
 
Join Date: Dec 2005
Location: Litchfield, CT
Posts: 3,989
Liked 109 Times on 90 Posts
Likes Given: 230

Default sure

Nu-Wool :: Premium Cellulose Insulation :: Home Page
Look around at insulation companies, also google building performance institute, they can help.


__________________

Just My
Made in the

inspectorD is offline  
 
Reply With Quote Quick reply to this message
Old 10-25-2009, 11:06 PM  
GBR
Senior Member
 
Join Date: Mar 2009
Posts: 337
Liked 18 Times on 17 Posts
Likes Given: 9

Default

Use 4 of these between the rafters without the baffles (keeping the 1-1/2" air space), and 1 on the face of the rafters under the drywall. Dow at Lowe's: 1" x 8' x 4' R-6.5 Polyisocyanurate Rigid Foam Insulation
1. Do you know proper knee-wall insulation installation?
2. Are the floor joists rated for floor or attic?
3. A window is required for proper light and ventilation and possible egress requirements, sized per code.
Be safe, Gary

__________________
GBR is offline  
 
Reply With Quote Quick reply to this message
Old 10-26-2009, 07:28 AM  
handyguys
Senior Member
 
handyguys's Avatar
 
Join Date: Feb 2008
Location: USA
Posts: 815
Liked 1 Times on 1 Posts

Send a message via Skype™ to handyguys
Default

I have done this project. There are a lot more considerations beyond insulation and head space as GBR said. When I did it R21 (as I recall) was to code. It likely isnt not now in my area.

So yeah, this may actually be a good place to start. Find out if you will need to rebuild or raise the roof to accommodate insulation requirements. You will have a lot more flexibility with layout too if you go that route.

On my project I built a 40' shed dormer on the back and two doghouse style dormers on the front.

__________________

The Handyguys Podcast [url]http://www.handyguyspodcast.com[/url]

handyguys is offline  
 
Reply With Quote Quick reply to this message
Old 10-26-2009, 12:26 PM  
peter_cottontail
Junior Member
 
Join Date: Oct 2009
Posts: 2
Default

thanks for the responses everyone; I'm having an architect come to determine the structural stability of the floor joists. My home was built in 1922 and the attic space is rafters with some purlin-strut supports along the sides. I'm thinking of substituting the struts for kneewalls and adding a few dormers to meet code for the living space. As far as windows are concerned, I have to get new windows to replace the gable vents. Basically, I'm just in the planning stages and not ready to begin this project with winter looming. I was just looking for information on an effective insulation tactic without compromising headroom so thanks everyone!

__________________
peter_cottontail is offline  
 
Reply With Quote Quick reply to this message
Old 10-26-2009, 01:24 PM  
GBR
Senior Member
 
Join Date: Mar 2009
Posts: 337
Liked 18 Times on 17 Posts
Likes Given: 9

Default

Ahhhh. Insulation Comparison Chart

Energy Savers: Foam Board Insulation

Welcome To Home Energy Magazine Online

Welcome To Home Energy Magazine Online

Insulation Fact Sheet
More if you need them.
Be safe, Gary



__________________
GBR is offline  
 
Reply With Quote Quick reply to this message
Reply


Tags
attic, insulation, remodel

Quick Reply
Message:
Options

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 On
Refbacks are On


Similar Threads
Thread Thread Starter DIY Home Repair Forum Replies Last Post
Time to replace attic insulation? Justluckey Green Energy and Sustenance Living 3 01-11-2011 06:26 PM
Attic insulation worth it??? waimeamike Green Energy and Sustenance Living 5 07-31-2009 07:39 PM
Time to replace attic insulation of a 50 yrs old house Ranch Green Energy and Sustenance Living 2 07-02-2009 02:14 PM
Yet Another Attic Insulation Advice WishIKnew Green Energy and Sustenance Living 4 02-20-2009 08:28 AM
Attic insulation casualfc General Home Improvement Discussion 1 08-12-2008 12:32 PM