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 11-18-2011, 09:35 AM   #16
Experienced
 
Jackofall1's Avatar
 
Join Date: Dec 2010
Location: Southern Michigan
Posts: 2,822
Share |
Default

1400 sq/ft of basically uninsulated attic


Yes I went back and read the entire post, not sure why I thought that the OP was completely cool with adding asbestos, guess we all get confused occassionally, me more than others I guess.

Mark

__________________
When its all said and done there is usually more said than done
Jackofall1 is offline   Reply With Quote
Old 11-18-2011, 11:51 AM   #17
Don't WANNA do it myself
 
mnp13's Avatar
 
Join Date: Jan 2007
Location: Rochester, NY Area
Posts: 474
Default

1400 sq/ft of basically uninsulated attic


No big deal.

So - back to vermiculite (the safe, non-asbestos containing kind)

how good of an insulator is it compared to cellulose?
mnp13 is offline   Reply With Quote
Old 11-18-2011, 12:46 PM   #18
Don't WANNA do it myself
 
mnp13's Avatar
 
Join Date: Jan 2007
Location: Rochester, NY Area
Posts: 474
Default

1400 sq/ft of basically uninsulated attic


Ok, the insulation guy just called me to see if I had received the quote, and I got some clarification.

The fiberglass is faced, so there is a vapor barrior, and then they blow in the cellulose on top of that. He specifically said that the cellulose would not compress the fiberglass.

Now, quite frankly, that would be a FAR cheaper way of insulating my attic - putting down a complete blanket of fiberglass, then putting cellulose on top of it. But again, I don't see how the weight of the cellulose wouldn't make the fiberglass as flat as a pancake.
mnp13 is offline   Reply With Quote
Old 11-18-2011, 11:44 PM   #19
Registered User
 
Join Date: Mar 2009
Posts: 9,968
Default

1400 sq/ft of basically uninsulated attic


It would compress the f.g., reducing its R-value. If cellulose at R-38 = 2-8oz. water bottles per square foot……..http://www.greenfiber.com/step_one_-...o_install.html

Remember all cellulose is not equal: http://www.rateitgreen.com/company/n...-created-equal
Shop around for another installer, unless he is talking only 2" of cellulose.


Gary
__________________
If any ads are present in my answer above, I do not condone/support/use the product or services listed, they are there against my permission.
Gary in WA is offline   Reply With Quote
Old 11-19-2011, 04:56 AM   #20
Don't WANNA do it myself
 
mnp13's Avatar
 
Join Date: Jan 2007
Location: Rochester, NY Area
Posts: 474
Default

1400 sq/ft of basically uninsulated attic


Yeah, that's what I thought too. He is talking about a lot more than two inches of cellulose. The batting was to be R-19, then enough cellulose on top to get to R-48. (as I recall anyway, it's almost six and I'm on hour four of very sick dog, so I'm a little fuzzy on details. :-) )
__________________
Michelle

Fixing the re-muddling one room at a time...
mnp13 is offline   Reply With Quote
Old 11-23-2011, 11:59 AM   #21
Don't WANNA do it myself
 
mnp13's Avatar
 
Join Date: Jan 2007
Location: Rochester, NY Area
Posts: 474
Default

1400 sq/ft of basically uninsulated attic


tonight's attic adventure...

I went upstairs to start working and heard growling. Yes, growling. There was a squirrel IN THE ATTIC with me. And it was threatening me. In my own attic! It then ran over the edge of the eve and continued to growl at me. It sat there for about fifteen minutes, while we walked around, talking, shining lights on it. You see, for the last week and a half, it's been nice out, so it has been running around over my head on the roof. Tonight was 35 degrees and raining, so it didn't want to be out there.

Which brings me to the next question...

I do not have soffit vents, and no way easy to cut them even if I did want them - well, that's not entirely true; I have one very large "soffit vent" in the back of the house. I just didn't happen to choose the location.

The roof joists go over the top of the brick, leaving a large gap. I was not planning to close up those gaps, but I really don't want squirrels in my new cellulose. Please don't tell me to find the hole that it is getting in through - I know exactly where it is... right next to the brand new board that cost me $500 to have installed. The little #%$@ chewed another hole within a week of getting the last one repaired. We're going to fill that area up with moth balls, and hopefully dispatch the furry tailed rat. To deter future guests, we're going to then douse the entire cavity with capstun - but we can't do that until all of the work in the attic is complete.

As I understand it, and please correct me if I'm wrong, when people talk about "air sealing" an attic, they are talking about the exchange of air between the house and the attic space, not the attic space and outside.
mnp13 is offline   Reply With Quote
Old 11-23-2011, 12:26 PM   #22
Exterior Construction
 
Windows on Wash's Avatar
 
Join Date: Aug 2011
Location: VA, MD, DC
Posts: 5,511
Default

1400 sq/ft of basically uninsulated attic


Quote:
Originally Posted by mnp13 View Post

As I understand it, and please correct me if I'm wrong, when people talk about "air sealing" an attic, they are talking about the exchange of air between the house and the attic space, not the attic space and outside.
Correct.

Air sealing is designed to finish or repair the envelope layer which is the barrier between the interior/conditioned air and the exterior.

Attic to exterior is not part of the envelope layer in this application.
Windows on Wash is offline   Reply With Quote
The Following User Says Thank You to Windows on Wash For This Useful Post:
mnp13 (11-23-2011)
Old 11-23-2011, 12:30 PM   #23
Don't WANNA do it myself
 
mnp13's Avatar
 
Join Date: Jan 2007
Location: Rochester, NY Area
Posts: 474
Default

1400 sq/ft of basically uninsulated attic


Ok, so besides the obvious reason of keeping the furry tailed devils out of my attic, I don't need to close those up? YAY! I was dreading that chore.

I also think I may have found out the source of the terrible icicles we get every year (besides the general lack of insulation!) - the cut off chimneys are just open to the attic, I'm quite sure they are great at sending warmer wall air up to the roof at that spot. I'm going to stuff a couple plastic bags down them and then top off with foam. There are also piles of bricks up there from where they broke the chimneys out, so I have some to use as replacements for the ruined ones on the house. Double YAY!
__________________
Michelle

Fixing the re-muddling one room at a time...
mnp13 is offline   Reply With Quote
Old 11-24-2011, 10:06 AM   #24
Exterior Construction
 
Windows on Wash's Avatar
 
Join Date: Aug 2011
Location: VA, MD, DC
Posts: 5,511
Default

1400 sq/ft of basically uninsulated attic


Baby steps.

FYI, the squirrels won't like living in the attic with the cellulose at that point. It irritates their skin.
Windows on Wash is offline   Reply With Quote
Old 11-25-2011, 09:59 AM   #25
Don't WANNA do it myself
 
mnp13's Avatar
 
Join Date: Jan 2007
Location: Rochester, NY Area
Posts: 474
Default

1400 sq/ft of basically uninsulated attic


I'm considering getting a foam kit to do the air sealing in the attic instead of going through 100 cans of Great Stuff. (ok, not 100, but a lot!)

If I do that, I'll probably do the rim joists in the basement at the same time. At my last house, they just filled the joists completely - in some places it was 12 inches of solid foam. Of course I understand that's the best way (if not the most cost effective) but I'm wondering if I can just put an inch or two around the cavities and then stuff them full of batting? The basement is very very damp, so I can't seal anything off completely with plastic or anything like that.
__________________
Michelle

Fixing the re-muddling one room at a time...
mnp13 is offline   Reply With Quote
Old 11-29-2011, 10:01 PM   #26
Don't WANNA do it myself
 
mnp13's Avatar
 
Join Date: Jan 2007
Location: Rochester, NY Area
Posts: 474
Default

1400 sq/ft of basically uninsulated attic


I found a local place that has the foam kits. More expensive than online but no shipping. We have two more wires to pull. Three lights to cut, then run the wires to the panel... Might be done this weekend!
__________________
Michelle

Fixing the re-muddling one room at a time...
mnp13 is offline   Reply With Quote
Old 11-30-2011, 10:57 PM   #27
Don't WANNA do it myself
 
mnp13's Avatar
 
Join Date: Jan 2007
Location: Rochester, NY Area
Posts: 474
Default

1400 sq/ft of basically uninsulated attic


Ok and now we have the final insult from the attic. Worse than the wiring. Worse than the leaks. Worse than the raccoon poop. Worse than the spiders. I had a tick on me this morning, and it could only have come from up there.

So, we have a Occupy Attic situation on our hands and after the air seal on Saturday will be the bombing on Sunday. I'm winning this battle, and there will be no prisoners.

Insulation next weekend.
__________________
Michelle

Fixing the re-muddling one room at a time...
mnp13 is offline   Reply With Quote
Old 12-01-2011, 08:14 AM   #28
Exterior Construction
 
Windows on Wash's Avatar
 
Join Date: Aug 2011
Location: VA, MD, DC
Posts: 5,511
Default

1400 sq/ft of basically uninsulated attic


Quote:
Originally Posted by mnp13 View Post
Ok and now we have the final insult from the attic. Worse than the wiring. Worse than the leaks. Worse than the raccoon poop. Worse than the spiders. I had a tick on me this morning, and it could only have come from up there.

So, we have a Occupy Attic situation on our hands and after the air seal on Saturday will be the bombing on Sunday. I'm winning this battle, and there will be no prisoners.

Insulation next weekend.
How big was the tick? Sure it wasn't jumped from one of the pups?

You certainly can have ticks up there as they were likely a hitch hiker on the raccoon.

Keep an eye on it and make sure you don't get a red area around it. If so, get yourself checked for Lymes.
Windows on Wash is offline   Reply With Quote
Old 12-01-2011, 08:29 AM   #29
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 25,541
Default

1400 sq/ft of basically uninsulated attic


I called a few foam installers out of curiosity and asked them about the idea of foaming over fiberglass batts. All of them asked is this a prank call, non of them had heard of anyone doing it that way.
In your area it's suggested you have at least R-50 which is 12" of insulation.
Any insulation you add can not block off the soffit vents. The best way to prevent that if your going to use blown in or batts is to add foam baffles before the insulation in the lower area where the walls and roof line meet.
If you do blown in it's a DIY job just very dusty and takes two people.
Any home center will let you use there blower for free if you buy 10 bags of insulation. I attach a piece of 3" PVC pipe to the hose they give you with duct tape. That way I can get all the way across the attic while standing in the middle of the room on boards instead of trying to walk on the rafters in a cloud of dust and insulation.
joecaption is online now   Reply With Quote
Old 12-01-2011, 09:00 AM   #30
Don't WANNA do it myself
 
mnp13's Avatar
 
Join Date: Jan 2007
Location: Rochester, NY Area
Posts: 474
Default

1400 sq/ft of basically uninsulated attic


Actually, they were going to pull out everything, then foam, then fiberglass, then blown in cellulose. My issue was the compression of the fiberglass by the weight of the cellulose - because if you mash the fiberglass down flat you pretty much negate the R-value.

I don't have any soffit vents. My soffit area is over the side of the house. I'm not sure how to describe it clearly...

When you go up into the attic, there are the ceiling joists for about 3/4 of the second floor. The joists are 2x4 in some areas and 2x6 in other areas. We have one room with the ceiling 18 inches higher than the rest of the second floor, the ceiling joists for that room are the 2x12 rafters that run across the attic parallel to the ceiling joists. So, there is about 2 1/2 feet of brick wall in the attic. On the top of the bricks are three 2x12 boards, and those boards are what the roof rafters attach to. The roof rafters go over the walls, and out into the soffit. The only vent in the soffit is the giant squirrel hole in the back of the house, and the gap in the front corner where we had hornets a few years ago. The attic has a square platform in the center of it, which is under the square, flat area of the roof where the coupla used to be. Most of the original coupla roof was used for covering the flat area, there is a piece of plywood over a section of it instead of the original boards, and there are two round vents in that part.

So, my point here is, with the exception of the taller ceiling area over the one room, I have over 2 feet of space over the ceiling joists for all of the rooms. I'll have to put something over the gaps in the roof rafters in the tall area, so they don't get plugged up, but the rest should be ok.

I'm using newspaper to block the holes in the rafters so that I have a "backing" for the foam to spray up against. I tested it with the cans, and it works well. The newspaper will also move as necessary so that the pressure of the foam won't hurt my walls - since it will be able to push the paper down and has space to expand into the attic. In the areas that are full of vermiculite, I'm going to foam over that to seal the top. We found a number of areas where the walls in the rooms below are open to the attic, effectively creating a "chimney" of warm air.

Nope, the tick wasn't from the dogs or cats. They all get that aweful Advantage stuff. I have to work every night next week, so we're going to bomb the attic on Sunday and it will have four days to settle and air out until I'm able to get back up there.

__________________
Michelle

Fixing the re-muddling one room at a time...
mnp13 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
Insulation, Ventilation in Cape Cod Side Attic Get'n er done Building & Construction 10 12-02-2010 11:38 PM
Wiring Protection for Accessible Attic BillyDIY Electrical 6 11-05-2009 08:44 PM
attic storage storageseeker Building & Construction 2 01-29-2009 08:02 AM
Attic Insulation Quote...what do you think? mitchel Roofing/Siding 15 08-06-2008 07:10 AM




Top of Page | View New Posts

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