Insulating Crawl Space - Building & Construction - DIY Chatroom Home Improvement Forum


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

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

Reply
 
Thread Tools Display Modes
Old 01-16-2009, 11:57 AM   #1
Newbie
 
Join Date: Dec 2008
Posts: 24
Rewards Points: 10
Default

Insulating crawl space


I am considering insulating our crawl space as there is no insulation at all. I'm debating on which type and how to do this. Is the preference towards insulating the crawl space wall and with what? Or between the floor joists with batts and then also insulating the water pipes, etc. I already have a vapor barrier on the ground and the crawlspace is vented and dry. What are the thoughts of everyone out there? also, we have radiant ceiling heat if this makes a difference in how you would do it. The house was built in '64. Is crawl space insulation worth the effort?

Advertisement


Last edited by jenoble99; 01-16-2009 at 12:17 PM. Reason: further thoughts
jenoble99 is offline   Reply With Quote
Old 01-16-2009, 02:32 PM   #2
Remodeling Contractor
 
Join Date: Dec 2008
Location: Sandy Hook, CT
Posts: 3,590
Rewards Points: 2,000
Default

Insulating crawl space


insulated the floor joists with batt insulation as long as you are sure it is now dry. And yes.. insulate all plumbing lines with a fiberglass pipe insulation.

Advertisement

Bob Mariani is offline   Reply With Quote
Old 01-16-2009, 03:49 PM   #3
Member
 
Join Date: Jul 2008
Location: Canada (s/w ON.)
Posts: 2,294
Rewards Points: 1,000
Default

Insulating crawl space


Insulating the walls and headers is a better option, then the plumbing will be protected! All outside venting should be permanently closed off and the space conditioned for both heat and A/C. Most moisture that occurs in crawl spaces, arrives via outside vents!
Wildie is offline   Reply With Quote
Old 01-16-2009, 04:31 PM   #4
Newbie
 
Join Date: Dec 2008
Posts: 24
Rewards Points: 10
Default

Insulating crawl space


Quote:
Originally Posted by Wildie View Post
Insulating the walls and headers is a better option, then the plumbing will be protected! All outside venting should be permanently closed off and the space conditioned for both heat and A/C.
The only issue with this is we don't have central heat, we have central A/C but our heat is via radiant ceiling heat.
jenoble99 is offline   Reply With Quote
Old 01-16-2009, 04:39 PM   #5
Member
 
Join Date: Jan 2009
Location: South of Boston, MA
Posts: 17,248
Rewards Points: 2,000
Default

Insulating crawl space


I had a similar situation & was instructed to insulate the outside walls & not the floor. I'd also insulate the pipes
Scuba_Dave is offline   Reply With Quote
Old 01-16-2009, 05:00 PM   #6
Remodeling Contractor
 
Join Date: Dec 2008
Location: Sandy Hook, CT
Posts: 3,590
Rewards Points: 2,000
Default

Insulating crawl space


A newer approach to crawlspaces is to seal the vents. Codes have not caught up but often these vents are sealed as soon as the crawlspace is dry.

From another site.
Q. I am building an addition over a 30-inch-high crawlspace. The local inspector has approved my plan to build a sealed crawlspace without ventilation. Should I install rigid foam insulation on the interior of the block walls, or should I insulate between the floor joists?
A. Howard Ferree, a licensed general contractor in the Asheville, N.C., area, responds: In almost all cases, Iíd suggest installing the insulation between the floor joists. Unless you are located in a climate where the crawlspace needs to be heated to keep the pipes from freezing, you donít want to heat and cool more space than necessary.
Although there is still some controversy about the best way to prevent crawlspace moisture problems, Iím now convinced that the most effective approach is to seal crawlspaces completely. Polyethylene should be installed across the crawlspace floor and should continue up the interior of the perimeter foundation walls, to form as complete a seal as possible.



My idea of the joists was due to the fact she is trying to keep the floor above warmer, not the crawlspace.
Bob Mariani is offline   Reply With Quote
Old 01-16-2009, 05:52 PM   #7
Member
 
Join Date: Jul 2008
Location: Canada (s/w ON.)
Posts: 2,294
Rewards Points: 1,000
Default

Insulating crawl space


Quote:
Originally Posted by jenoble99 View Post
The only issue with this is we don't have central heat, we have central A/C but our heat is via radiant ceiling heat.
If you have enough capacity in your electrical panel, a heater could be installed in the crawl space! It would help warm your feet!
Wildie is offline   Reply With Quote
Old 01-16-2009, 05:53 PM   #8
Member
 
Join Date: Jan 2009
Location: South of Boston, MA
Posts: 17,248
Rewards Points: 2,000
Default

Insulating crawl space


True, this depends upon location
My floor was actually already insulated
I opted to leave it & add the perimeter board insulation
My pipes were insulated & my heating ducts were insulated

If it's deep enough down the ground stays around 50-55
By adding the perimeter board it allows the crawl space to maintain a min heat in the winter
Scuba_Dave is offline   Reply With Quote
Old 01-16-2009, 05:58 PM   #9
Member
 
Join Date: Jul 2008
Location: Canada (s/w ON.)
Posts: 2,294
Rewards Points: 1,000
Default

Insulating crawl space


Quote:
Originally Posted by Scuba_Dave View Post
True, this depends upon location
My floor was actually already insulated
I opted to leave it & add the perimeter board insulation
My pipes were insulated & my heating ducts were insulated

If it's deep enough down the ground stays around 50-55
By adding the perimeter board it allows the crawl space to maintain a min heat in the winter
Thata a valid point!
Wildie is offline   Reply With Quote
Old 06-18-2009, 12:48 PM   #10
Newbie
 
Join Date: Jun 2009
Posts: 2
Rewards Points: 10
Smile

Insulating crawl space


Quote:
Originally Posted by Scuba_Dave View Post
True, this depends upon location
My floor was actually already insulated
I opted to leave it & add the perimeter board insulation
My pipes were insulated & my heating ducts were insulated

If it's deep enough down the ground stays around 50-55
By adding the perimeter board it allows the crawl space to maintain a min heat in the winter
I live in Northern New York, and the floor of our crawlspace is dirt. We via Monitor heating. The pipes below the house are not insulated. Should we insulate our pipes, insulate and seal the crawlspace and also lay a vapor barrier over the ground? We are planning to start this project early fall.
Equjumper is offline   Reply With Quote
Old 06-18-2009, 01:09 PM   #11
Household Handyman
 
Join Date: Feb 2009
Location: Albany, Ga.
Posts: 2,301
Rewards Points: 1,054
Default

Insulating crawl space


"To insulate crawlspaces or not". I think this is a question that will go on forever. I also believe it has a lot to do with what part of the county you are located in. As far as getting a crawlspace dry, this is my story: Standing and looking at my front yard, there is a negative elevation change of about a foot from right to left. There is also a negative elevation change from the right front corner to the back left corner of 28" in approximately 192 feet. Now, we are sitting on that famous S. GA. red clay soil which is actually really fine, ground up, course sand. Water will enter my yard at the right front corner and migrate through this clay to the back left hand corner, according to the Geologist in my area. I do know this, water will migrate through the concrete block of my house foundation and into my crawlspace. A small trench dug part way along the front inside wall of my foundation confirmed this. Another trench dug all along the front inside foundation wall and then along the eastern foundation wall will let water actually migrate to this lowest point and will puddle there. Therefore, there is a shallow trench all along my interior foundation wall, allowing water to migrate to the lowest point to a catch basin. At that point there is a small sump pump which will pump this water out. Sometimes it will be three to four days after a heavy rain when I see this water being pumped out. I also have a fan on a timer under my house to provide extra circulation. Yet, in my business I have to crawl under houses in my area that the dirt is as dry as a desert. Good Day, David

Advertisement

Thurman is offline   Reply With Quote
Reply


Thread Tools
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
Crawl Space Insulation skinny2 Building & Construction 10 12-12-2008 12:36 PM
Insulating split level home crawl space. sithappens Building & Construction 1 02-29-2008 10:47 AM
Crawl Space In Basement -- Please Help thekid Building & Construction 7 01-04-2008 09:15 PM




Top of Page | View New Posts