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 01-06-2012, 07:00 AM   #1
Member
 
langless28's Avatar
 
Join Date: Nov 2011
Location: MA
Posts: 166
Share |
Default

no wall insulation


i just had a home energy audit yesterday and it was brought to our attention that our house has no wall insulation (1959 bd). he recommended that we do blown in insulation as well as adding another 6" of blown in into the attic. what are the pros and cons of this insulation method? my main concern is the chance of mold growing in the walls due to moisture in the walls. that's based on my theory because i was doing some electrical outlets over and noticed the inside of the boxes had a little surface rust.

langless28 is offline   Reply With Quote
Old 01-06-2012, 07:30 AM   #2
MarginallyQualified
 
Join Date: Dec 2011
Location: Winston-Salem NC
Posts: 3,647
Default

no wall insulation


Quote:
Originally Posted by langless28 View Post
he recommended that we do blown in insulation as well as adding another 6" of blown in into the attic. what are the pros and cons of this insulation method?
It's a plain vanilla, cut to the chase, most for least prescription.

There are a few details to sort through for what might be appropriate to do right before or along with these jobs (like attic eave vents, and cat walks, locating and adding to any attic wiring, etc)... but doing the insulation work isn't really a choice.

hth

TarheelTerp is offline   Reply With Quote
Old 01-06-2012, 07:44 AM   #3
Member
 
langless28's Avatar
 
Join Date: Nov 2011
Location: MA
Posts: 166
Default

no wall insulation


Quote:
Originally Posted by TarheelTerp View Post
It's a plain vanilla, cut to the chase, most for least prescription.

There are a few details to sort through for what might be appropriate to do right before or along with these jobs (like attic eave vents, and cat walks, locating and adding to any attic wiring, etc)... but doing the insulation work isn't really a choice.

hth
the roof is newer and has a full length ridge vent, along with two gable vents. he did the calc's and said my attic is actually a little over vented. i had planned on adding soffit vents but i guess i do not have to now.

i would like a catwalk up there so i would need to first discuss this?

and i will eventually be doing some wiring changes up there (adding overhead lighting in the rooms etc. but that is not in the immediate future.


he quoted me a what i believe fair price (we have a rebate too) for all that work to be done. the only thing is there is already a 10 week lead time

also this service would include all the wall insulation, attic insulation, attic door insulation, air sealing, and blower door test.
langless28 is offline   Reply With Quote
Old 01-06-2012, 08:46 AM   #4
Exterior Construction
 
Windows on Wash's Avatar
 
Join Date: Aug 2011
Location: VA, MD, DC
Posts: 5,530
Default

no wall insulation


Given the home is 50+ years old, you probably have so many coats of paint on the interior walls that they are functioning as a Class 2 Vapor retarder at that point.

What is the exterior of the home?

Getting everything sealed up and air tight on the interior (and attic side) is the key to controlling moisture and any mold/mildew problems.
Windows on Wash is online now   Reply With Quote
Old 01-06-2012, 09:02 AM   #5
Member
 
langless28's Avatar
 
Join Date: Nov 2011
Location: MA
Posts: 166
Default

no wall insulation


the exterior is painted ceder shingles.

the attic will be air sealed

i am going to tackle insulating/sealing the rim joist area this weekend with rigid foam, i do have about 10' long exterior wall that has 2' overhang in the living room area so i have those deep rim joists there; not sure the best way to go about insulating that (obviously spray foam but its such a small area i can justify the cost)
langless28 is offline   Reply With Quote
Old 01-06-2012, 09:17 AM   #6
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 25,570
Default

no wall insulation


Blowing it in the walls is the only way unless you remove all the outside siding or remove the inside wall material be it plaster or sheetrock.
It's not going to be perfect but it will be better then nothing.
It will settle over time leaving spaces at the top, as it's going in it willtend to pile up where wires cross the studs, if there's any diaganal bracing in the corners there will be a void under them.
If there's going to be an electrical up grade (whole new panel, new wiring to lights and outlets) or there's old failing plaster I'd go a differant route.
Have the old windows been replaced yet? That alone would save you a ton of money.
Adding something as foam pads behind the outlet and switch covers, sealing up all the holes in the crawl space or basement where they ran wiring and plumbing with expanding foam will help and it's DIY.
joecaption is online now   Reply With Quote
Old 01-06-2012, 09:49 AM   #7
Member
 
AGWhitehouse's Avatar
 
Join Date: Jul 2011
Posts: 1,378
Default

no wall insulation


A pretty cool product that I saw tested and actually filled 95% of the bay and will not settle over time is "Tripolymer 105". We had the contractor marketing the product fill a bay and then rip off the interior sheathing so we could see the results. It was installed within the stud bays through two 2-1/2" diameter holes.

Here is a picture after the contractor removed the wall sheathing and you can see where we pealed back the existing kraft paper to see how much of the bay was filled.
__________________
Life's too short...so enjoy it!

Last edited by AGWhitehouse; 06-19-2013 at 02:59 PM.
AGWhitehouse is offline   Reply With Quote
Old 01-06-2012, 10:22 AM   #8
Member
 
langless28's Avatar
 
Join Date: Nov 2011
Location: MA
Posts: 166
Default

no wall insulation


i read somewhere that its better to blow it in from the bottom then the top? is there a method i should stay away from?

the sheetrock is in pretty good shape so i will not be tearing any walls down.

i would avoid a expanding foam type deal because in the event of adding new circuits/ fixes it would impossible to fish wires. this is a first starter home for me so i think it will suffice.

joe, the windows are the newer vinyl insert types that go in the original window jambs and when i do the trim over in the rooms, i will spray foam that area, and i already spray foamed the tiny triangular area between the bottom of the windows and bottom of the existing sill plate. and like i said i will tackle most of the rim joists in the immediate future.
langless28 is offline   Reply With Quote
Old 01-06-2012, 10:47 AM   #9
Newbie
 
Join Date: Jan 2012
Posts: 12
Default

no wall insulation


I would definitely get the insulation installed as soon as possible. There is a chance that the insulation will grow mold but shouldn't the guy who have suggested getting insulation have warned you about that? The guys who install the insulation will be able to tell if it is going to get moldy.

Because your house is older, you must take caution when doing all of this but you want to make sure the job is done right. Insulation in your home is definitely going to help you and your home out in a variety of ways.
Phillies48 is offline   Reply With Quote
Old 01-06-2012, 11:21 AM   #10
MarginallyQualified
 
Join Date: Dec 2011
Location: Winston-Salem NC
Posts: 3,647
Default

no wall insulation


Quote:
Originally Posted by langless28 View Post
the roof is newer and has a full length ridge vent, along with two gable vents. he did the calc's and said my attic is actually a little over vented.
the gable vents work against the ridge vents...
it's a one or the other thing and most will say ridge is best.
on that basis... and as you have ridge vents a plan to close up the gables is in order.

Quote:
i had planned on adding soffit vents but i guess i do not have to now.
Er no.... If anything this is the #1 thing you need to do.
(and before adding anything else in your way up there)

But you should already have at least some eave vents.
The ide is to be sure they are enough and won't be blocked when insulation is set.

Quote:
i would like a catwalk up there so i would need to first discuss this?
3/4" Plywood sheet ripped to 16 or 24"... screwed down to the top of the rafter in a KNOWN pattern. (Thats right down the middle for most.)

Quote:
and i will eventually be doing some wiring changes up there (adding overhead lighting in the rooms etc. but that is not in the immediate future.
Plan it. think of coax and speakers and hdmi and ceiling fans too...
at the least be sure what is currently there is secure with known location

Quote:
he quoted me a what i believe fair price (we have a rebate too) for all that work to be done. the only thing is there is already a 10 week lead time
that's a good sign. Good contractors stay busy.
But there isn't anything described here that isn't DIY-able
(except the in wall work which is more an equipment/PITA thing than hard)

hth

Last edited by TarheelTerp; 01-06-2012 at 11:24 AM.
TarheelTerp is offline   Reply With Quote
Old 01-07-2012, 10:23 PM   #11
Registered User
 
Join Date: Mar 2009
Posts: 9,968
Default

no wall insulation


If they are dense-packing the cellulose in the walls only, there won't be any settling or dead spots; http://www.karg.com/pdf/Presentation...Insulation.pdf

The rust spots are from the conditioned (with moisture) air from inside going through the outlets due to the "stack effect", natural and mechanical; http://www.wag-aic.org/1999/WAG_99_baker.pdf

Foamboard the 2' overhang, add plywood: http://www.buildingscience.com/docum...n-crawlspaces/

If he's really good, he will recommend air sealing behind/under the shoe moulding or baseboard (depends on the gaps)...... after he smoke tests it.

You want more soffit vents than exhaust; http://www.inspectapedia.com/interiors/atticcond10.htm

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
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
Exterior Wall Insulation Dutchman80 Building & Construction 1 08-06-2010 09:28 PM
attic insulation / knee wall oscarMadison Building & Construction 2 01-19-2010 08:37 PM
Marrying a sloping stone wall to a cinder block wall. mrdol Landscaping & Lawn Care 1 11-09-2007 04:08 PM
Exterior wall insulation ffgus Remodeling 4 11-06-2007 04:23 PM




Top of Page | View New Posts

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