Just Added Attic Insulation. House Is Still Cold. Advice? - Insulation - Page 2 - DIY Chatroom Home Improvement Forum
Advertisement


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

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

Like Tree19Likes
Reply
 
Thread Tools
Display Modes
Old 01-13-2020, 01:17 AM   #16
Member
 
Join Date: Nov 2014
Location: Canada
Posts: 10,785
Rewards Points: 324
Default

Re: Just added attic insulation. House is still cold. Advice?


Running a regular furnace blower continuously can really increase the electric bill even on lowest speed.

I wouldn't do it without an energy efficient ecm motor - in a new furnace or if the existing furnace isn't that old retrofitting into existing. (mars azure, gentec evergreen, emerson ecotech)
__________________
I am not in the business of any trade I give advice on. I have non-professional hvac experience + good knowledge of theory. Attempt repairs at your own risk. Never jump out safeties - especially pressure switches - on a furnace for testing with fuel supply on; use a meter. Do not troubleshoot with live line voltage present unless there's no alternative.
user_12345a is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 01-13-2020, 11:56 AM   #17
Newbie
 
Join Date: Jun 2013
Posts: 19
Rewards Points: 40
Default

Re: Just added attic insulation. House is still cold. Advice?


Quote:
Originally Posted by user_12345a View Post
You do have a rim joist, it's the wood in the pics.

They used fiberglass to stop air leakage between foundation and rim joist - it's dirty indicating air is flowing through it.

I would remove the fiberglass and fill with foam.

You can probably glue rigid foam or roxul board to the rim joist. Foam can not be left exposed due to the fire risk.

If your foundation doesn't have major moisture infiltration issues, can put 2" of roxul board directly on it.

Roxul board doesn't have high r-value per inch but the first R5 to R10 saves the most energy - beyond that the money is better spent elsewhere in an old house.

You can look at relocating the registers to the perimeter at least on the main floor - lots of $$ though.

10 minute on/20 minute off furnace cycles in extreme cold indicates an oversized furnace. Most furnaces are oversized though.

I can definitely remove the fiberglass between the foundation and rim joist, but I'm not sure if I can just fill it with cans of spray foam or if the expansion could cause problems with either one.



If I glue rigid foam board to the joist, how could I cover it so it's not exposed?


Is it worthwhile to try an fill the concrete block voids in some way? I guess I could only even try and fill the voids that are accessible. If I have others--I'm sure I do--I can't reach them. But isn't trying to insulate the rim joist a waste of time with the voids being a factor?
RoughDraft is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 01-13-2020, 12:13 PM   #18
retired framer
 
Join Date: Jun 2017
Location: Fraser Valley BC Canada
Posts: 30,376
Rewards Points: 4,406
Default

Re: Just added attic insulation. House is still cold. Advice?


__________________
Do not use flat bottom gables with scissor trusses.
Nealtw is online now   Reply With Quote
Sponsored Links
Advertisement
 
Old 01-13-2020, 05:12 PM   #19
Member
 
Missouri Bound's Avatar
 
Join Date: Apr 2011
Location: Almost Arkansas
Posts: 2,833
Rewards Points: 2,138
Default

Re: Just added attic insulation. House is still cold. Advice?


Although attic insulation helps, the statistics show that attics are responsible for about 25% of heat loss in the winter. The other 75% is through leaky windows and doors and of course poor wall insulation. Do you know what's in the walls?
__________________
Do you want it your way or the right way?
Missouri Bound is offline   Reply With Quote
Old 01-15-2020, 11:08 AM   #20
Newbie
 
Join Date: Oct 2017
Location: Maryland
Posts: 3
Rewards Points: 6
Default

Re: Just added attic insulation. House is still cold. Advice?


Do you have a fireplace(s)? The more insulation, new windows, vent closures, etc. that is done to a house, will make the opening of the fireplace seem like an open window in the home. There is a trend, to "seal the envelope" of the house for better energy savings. This is good, until the last opening is closed up...the fireplace.
I suggest an insulate cover for the fireplace. You can use a foam board, a chimney balloon, insulated magnetic cover, plastic window film. Whatever you can make or buy, just cover the fireplace and you will be amazed at the difference.
Dave Sal likes this.
Beevy is offline   Reply With Quote
Old 01-15-2020, 11:08 PM   #21
Member
 
Join Date: Jan 2017
Location: Dallas / Ft Worth
Posts: 145
Rewards Points: 290
Default

Re: Just added attic insulation. House is still cold. Advice?


If the cinder blocks are empty, can you cut a hole in the wall and fill them with foam?
Assuming that no mortar has fallen between the blocks, it seems like there would be a clear path from top to bottom. Or, you might even be able to fill them with some free flowing concrete that does not have aggregate, (rocks) if you could fill them from the top.

Like someone said earlier, you can check the sides of the windows, behind the trim to make sure any voids are filled with insulation; but that should have been done with the new windows you installed.

An infrared attachment for your smartphone would reveal heat loss: FLIR is the most popular. https://www.amazon.com/s?k=flir&ref=nb_sb_noss

Just a few ideas.
Good Luck
DallasCowboys is online now   Reply With Quote
Old 01-17-2020, 05:25 PM   #22
APA
Member
 
Join Date: Jul 2018
Posts: 122
Rewards Points: 244
Default

Re: Just added attic insulation. House is still cold. Advice?


My advice would be that it is winter and old houses are cold. My new house is cold. You can drive yourself crazy on these forums because these guys deal in perfection. Also, building science is changing all the time and nobody really knows. If you want to stay warm in the winter, move to Florida. I am being serious. I have seen people on here be advised to dig out around their basement and glue foam board to the side of their blocks.
APA is offline   Reply With Quote
Old 01-17-2020, 05:26 PM   #23
APA
Member
 
Join Date: Jul 2018
Posts: 122
Rewards Points: 244
Default

Re: Just added attic insulation. House is still cold. Advice?


Quote:
Originally Posted by APA View Post
My advice would be that it is winter and old houses are cold. My new house is cold. You can drive yourself crazy on these forums because these guys deal in perfection. Also, building science is changing all the time and nobody really knows. If you want to stay warm in the winter, move to Florida. I am being serious. I have seen people on here be advised to dig out around their basement and glue foam board to the side of their blocks.

I was this thread!!!
APA is offline   Reply With Quote
Old 01-17-2020, 07:27 PM   #24
Member
 
Missouri Bound's Avatar
 
Join Date: Apr 2011
Location: Almost Arkansas
Posts: 2,833
Rewards Points: 2,138
Default

Re: Just added attic insulation. House is still cold. Advice?


Find a thermal camera or hire someone to use one around your house to figure out where the infiltration is. It is a much cheaper alternative than throwing money at your home until you are broke and still cold.
And digging around the foundation to put insulation in is ridiculous.
You are already on the right track with adding ceiling insulation.
You need to find out where the cold air is coming from first...then make the changes.
__________________
Do you want it your way or the right way?
Missouri Bound is offline   Reply With Quote
Old 01-17-2020, 07:38 PM   #25
Member
 
Join Date: Nov 2014
Location: Canada
Posts: 10,785
Rewards Points: 324
Default

Re: Just added attic insulation. House is still cold. Advice?


Quote:
Originally Posted by APA View Post
My advice would be that it is winter and old houses are cold. My new house is cold. You can drive yourself crazy on these forums because these guys deal in perfection. Also, building science is changing all the time and nobody really knows. If you want to stay warm in the winter, move to Florida. I am being serious. I have seen people on here be advised to dig out around their basement and glue foam board to the side of their blocks.
Building science is based careful observation, study and testing different construction methods. It doesn't change very quick.

Have things done right in accordance with best practices and it won't feel cold.

If a house is uncomfortable in winter, there's at least one thing that was wrong.

It's a question of how much money to spend to correct problems; it can be very expensive to retrofit an old home.

Along the same lines, many contractors will claim that "cold air is heavy" and therefore you can't properly cool a 2-story home with one central a/c system with the furnace or air handler in the basement and 2-systems or zoning are required. These same people use 1950s rule of thumb to design systems. It's complete BS - when duct system is done right and balanced, even 3 stories can be done with one system.
__________________
I am not in the business of any trade I give advice on. I have non-professional hvac experience + good knowledge of theory. Attempt repairs at your own risk. Never jump out safeties - especially pressure switches - on a furnace for testing with fuel supply on; use a meter. Do not troubleshoot with live line voltage present unless there's no alternative.
user_12345a is offline   Reply With Quote
Old 01-17-2020, 07:38 PM   #26
retired framer
 
Join Date: Jun 2017
Location: Fraser Valley BC Canada
Posts: 30,376
Rewards Points: 4,406
Default

Re: Just added attic insulation. House is still cold. Advice?


@APA,
@Missouri Bound


It is one thing to knock something you have never seen or heard of before but if you were to make suggestions on solving the problems that were asked about so we could explain the problems your suggestions cause. And just live in a cold house is not an answer. .
Bud9051 likes this.
__________________
Do not use flat bottom gables with scissor trusses.
Nealtw is online now   Reply With Quote
Old 01-17-2020, 08:43 PM   #27
retired framer
 
Join Date: Jun 2017
Location: Fraser Valley BC Canada
Posts: 30,376
Rewards Points: 4,406
Default

Re: Just added attic insulation. House is still cold. Advice?


https://www.nrcan.gc.ca/energy-effic...sulation/15639


__________________
Do not use flat bottom gables with scissor trusses.
Nealtw is online now   Reply With Quote
Old 01-17-2020, 09:18 PM   #28
Member
 
Missouri Bound's Avatar
 
Join Date: Apr 2011
Location: Almost Arkansas
Posts: 2,833
Rewards Points: 2,138
Default

Re: Just added attic insulation. House is still cold. Advice?


Quote:
Originally Posted by Nealtw View Post
@APA,
@Missouri Bound

It is one thing to knock something you have never seen or heard of before but if you were to make suggestions on solving the problems that were asked about so we could explain the problems your suggestions cause. And just live in a cold house is not an answer. .
Insulating the floor would be 10X cheaper than insulating the exterior the perimeter foundation walls and 10X more effective.
Apparently you have never heard of insulating the living space.
I'm sure you are some sort of expert, but don't think I don't know about foundation insulation. If you read the concern of the OP, his living space is losing heat. Either his walls or his floor are the culprit....certainly not the foundation. In fact many many homes have built on piers without a foundation and they certainly aren't cold because of it. I'm not saying it's a bad idea....but not in this situation.
__________________
Do you want it your way or the right way?
Missouri Bound is offline   Reply With Quote
Old 01-17-2020, 09:39 PM   #29
retired framer
 
Join Date: Jun 2017
Location: Fraser Valley BC Canada
Posts: 30,376
Rewards Points: 4,406
Default

Re: Just added attic insulation. House is still cold. Advice?


Quote:
Originally Posted by Missouri Bound View Post
Insulating the floor would be 10X cheaper than insulating the exterior the perimeter foundation walls and 10X more effective.
Apparently you have never heard of insulating the living space.
I'm sure you are some sort of expert, but don't think I don't know about foundation insulation. If you read the concern of the OP, his living space is losing heat. Either his walls or his floor are the culprit....certainly not the foundation. In fact many many homes have built on piers without a foundation and they certainly aren't cold because of it. I'm not saying it's a bad idea....but not in this situation.

from the OP post 1

If the cinder blocks are empty, can you cut a hole in the wall and fill them with foam?


That sounds like a basement to me. If he has drafts in the basement it would be a safe bet that it is somewhere around where the wood meets concrete.

I also suggested a way to block the drafts from the outside which would require some digging. I doubt it would be stretch to think the frost depth down there is not very deep. The basement floor and the walls below frost are a constant temp year round by insulation the outside you extend that area right up to the floor.



You spoke of insulating the living space.

Insulate the inside of the foundation walls and cover that with drywall and argue about whether it should have a vapour barrier. That can still be done later but in the mean time he is trying to solve the problems of the cold in the portion of the house he is living in.
Bud9051 likes this.
__________________
Do not use flat bottom gables with scissor trusses.
Nealtw is online now   Reply With Quote
Old 01-17-2020, 09:48 PM   #30
Member
 
Missouri Bound's Avatar
 
Join Date: Apr 2011
Location: Almost Arkansas
Posts: 2,833
Rewards Points: 2,138
Default

Re: Just added attic insulation. House is still cold. Advice?


Post 8 has photos. The basement is not living space.
__________________
Do you want it your way or the right way?
Missouri Bound is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply



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





Top of Page | View New Posts