Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-13-2010, 02:39 PM   #1
Newbie
 
Join Date: Oct 2010
Posts: 5
Rewards Points: 0
Share |
Question

Attic insulation over the cavity above the stairs


Begining a project to add blown insulation to the attic. Currently, about 6 inches of blown cellulose insulates portions of the attic. From the attic I can see down into the cavities above my stairs (from the 1st floor, stairs come up 8 steps to a landing, turn 90 degrees, then 5 more steps to the 2nd floor.) It appears that plastic sheeting had covered these openings at one time but may have fallen in. The insides of the cavities do not appear insulated. I do not know if the plastic sheeting is supposed to cover the opening to the attic, or, if this was perhaps some other failed attempt by a previous owner to prevent cold air from chilling the stair wells.

Can anyone tell me, from the attic, should I be able to see down into the cavity above the stairs or not?

If not, do I stretch new plastic, drywall or foamboard across the opening and insulate over top of the closed opening? Can I do this without causing moisture build-up issues? If not, what should I do to avoid filling the entire cavity with blown insulation?

jkocher is offline   Reply With Quote
Old 10-14-2010, 03:07 AM   #2
Member
 
Join Date: Dec 2008
Location: Fairbanks, AK
Posts: 1,847
Rewards Points: 0
Default

Attic insulation over the cavity above the stairs


I can tell you this much; get that plastic the hey out of there. Any conditioned space (heated) needs insulation over it; period. Cellulose is a good choice in most instances. I am not picturing this "cavity", but why not fill it as much as needed? Drywall is vapor permeable, and should not present any real moisture issues; so is EPS (white styrofoam) and I believe XPS is, too (blue or pink styrofoam). NO foil faced stuff. If you cover the cavity w/ something vapor permeable, then blow cellulose over that, you should be fine. You'll just have a big dead air space.

jklingel is offline   Reply With Quote
The Following User Says Thank You to jklingel For This Useful Post:
jkocher (10-14-2010)
Old 10-14-2010, 07:42 AM   #3
Member
 
steveel's Avatar
 
Join Date: Sep 2010
Posts: 287
Rewards Points: 0
Default

Attic insulation over the cavity above the stairs


You have to think "thermal envelope" and make sure it is insulated whether it is flat or zigzags up down and around. I plan to take my thermal envelope over the stair assembly so it stays flat.... Insulating a full height walk up attic stairway
Much easier, it seems, than insulating the kneewalls and we don't use the attic all that much.

If you go that road, block off the cavities that are part of the thermal envelope, and figure out how to put insulation on top. I don't picture it either exactly... sounds like you might end up with an attic insulation hatch over part of the cavities, and the cellulose over the rest.
steveel is offline   Reply With Quote
The Following User Says Thank You to steveel For This Useful Post:
jkocher (10-14-2010)
Old 10-14-2010, 09:45 PM   #4
Newbie
 
Join Date: Oct 2010
Posts: 5
Rewards Points: 0
Default

Attic insulation over the cavity above the stairs


First, thank you both for your replies. The plastic will go, but, before I make a correction, I think I will get back up there and take a couple photos or try to draw a diagram of the space above the stairs. I know my terminology and descriptions are not so great, but maybe a picture would help.

I will try to send you guys a note when I get the photo. Might be a few days - the weekend is here and hunting season is in, so I'll be in the woods for a bit (rather than in my attic.)

Again, thanks so much for your help.
jkocher is offline   Reply With Quote
Old 10-15-2010, 01:47 AM   #5
Member
 
Join Date: Dec 2008
Location: Fairbanks, AK
Posts: 1,847
Rewards Points: 0
Default

Attic insulation over the cavity above the stairs


Wait a minute! You're going hunting and I'm NOT? No way will I ever answer a question of yours again. Some meat could change my mind, though....
jklingel is offline   Reply With Quote
Old 10-15-2010, 09:03 AM   #6
Newbie
 
Join Date: Oct 2010
Posts: 5
Rewards Points: 0
Thumbs up

Attic insulation over the cavity above the stairs


HA! Well, as far as meat goes, and, if early PA archery season history repeats itself, I might as well take my bow up and sit in the attic with it. But, the fresh air and outdoors keeps me sane, so like always I'll go out anyway and sit in the woods, meat or no meat.

More to follow...

jkocher is offline   Reply With Quote
Reply

Tags
insulation, opening, stairwell cavity


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
Recently Topped Up Attic with Blown Insulation...Now I have Frost/Condensation earthad1 Building & Construction 81 02-18-2011 12:42 PM
Adding insulation and storage to Cape Cod Side Attic turin39789 General DIY Discussions 5 11-08-2010 10:50 AM
Attic Insulation - Can't seem to find the answer Ags Win Building & Construction 8 06-29-2010 06:05 PM
Attic moisture Carstonio Roofing/Siding 14 01-29-2009 11:35 AM
Attic Insulation Installation oktooma Building & Construction 3 10-29-2008 03:46 AM




Top of Page | View New Posts

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