COMMUNITY FORUM

LITIMJO

09:50AM | 02/28/03
Member Since: 01/15/02
25 lifetime posts
Bvhvac
My den area is over a crawlspace. There was never any insulation installed under the floor. The crawl space has a scratch coat of cement on the floor. But what was done was that a vapor barrier was stapled to the bottom of the subfloor, apparently prior to putting down the subfloor since it runs right on top of the floor joists also. I seem to remember hearing this is not a good situation. Should I cut this away before I install the insulation or can a just leave it in place and install the insulation over it? Even if a cut it away, I'm not sure if I could get it out from under the joist.
I tried posting this in Basements but got know reply. Thanks

homebild

03:56PM | 02/28/03
Member Since: 01/28/03
693 lifetime posts
Of what is the 'vapor barrier' stapled to the bottom of the subfloor made?

LITIMJO

01:55AM | 03/01/03
Member Since: 01/15/02
25 lifetime posts
Sorry, it is the 6 mil thick polyethylene that I usually see recomended for the ground on a dirt crawl space.

LITIMJO

08:41AM | 03/07/03
Member Since: 01/15/02
25 lifetime posts
Back to the top hoping for a reply.

Housebroken

01:41AM | 03/23/03
Member Since: 12/23/02
18 lifetime posts
It depends on your climate. If I'm understanding you, the vapor barrier is just beneath the subfloor, but on top of the joists. In a cold climate, it's fine where it is. You want the vapor barrier on the warm in winter side of the insulation. You would simply install your insulation between the joists, underneath the poly.
You can also add a vapor barrier to the crawlspace floor, but there may already be one under the concrete.

Lawrence

10:53AM | 04/12/03
Member Since: 11/14/00
333 lifetime posts
It depends on whether your crawlspace stays somewhat warm in winter or gets as cold as the outdoor air.

If your house is elevated and the crawlspace is under that elevation so as to be exposed to the outdoor air, then you are fine: install the insulation between the joists, with the vapor-barrier between the insulation and the interior or your house.

However, if your crawl space is underground or if it is insulated from the outdoor air, itself, then that vapor barrier could end up trapping moisture inside the crawl space, which could condense inside the insulation and rot it out. If that is the case, then either ripping out the current barrier or leaving it in could be the proper remedy. We can't tell from here.

Take a look at some of the other recent posts for the purpose of a vapor barrier to judge for yourself. There are also relevent posts under "Basements" on this Bulletin Board.

Click_to_reply_button
Inspiration_banner

INSPIRATION GALLERY



Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.

Reply_choose_button

Anonymous

Post_new_button or Login_button
Register

Let it snow by stringing your tree with sparkly snowflakes — the kind that will never melt. LEDs on string lights burn mu... Filling an underutilized area beneath the stairs is a smart way to save space. Doing so with a stash of wood, however, is ... The Audubon Society inspired wallpaper in this Adirondack-styled entryway will get you in the outdoor mood. Grab your coat... Chalkboard paint opens up endless possibilities for customizing your dresser time and time again. Use chalk to label the c... A fireplace in the bathroom creates the ultimate setting for relaxation. Homeowners often choose electric or gas over wood... This roomy boot tray made from punched metal stands up to all the elements. Station it in your mudroom or at your back doo... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... FLOR carpet tiles are a simple and affordable way to customize a floor covering for any space. You can make anything from ... Chalkboard paint features prominently in this elegant yet unpretentious headboard design. Add a new message daily to reflec... Salvaged boards in varying widths and colors make up the dramatic accent wall in this attic space. The high-gloss white of... The indecisive homeowner need not fret over choosing one (or even two) cabinet colors. The kitchen cabinets in this artist... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... Simple and striking, a couple of pieces of "lovingly used" furniture creates a special kind of charm. A weathered chair fo... First dress up your metal shelves with a coat of paint in an accent color that complements your kitchen decor. Then arrang... The vibrant green of Granny Smith apples make a beautifully natural alternative to the traditional evergreen wreath. Brigh...
Follow_banner_a
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon