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
694 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

captcha
type the code from the image

Anonymous

Post_new_button or Login_button
Register

This garden shed has been decked out to the nines. Designer Orla Kiely created the intimate home for a flower trade show, ... Built on a rocky island in the Drina River, near the town of Bajina Basta, Serbia, this wooden house was cobbled together ... Large steel-framed windows flood the interior of this remodeled Michigan barn with daylight. The owners hired Northworks A... Edging formed with upside-down wine bottles is a refreshing change. Cleverly and artistically involving recycled materials... A Washington State couple called on BC&J Architects to transform their 400-square-foot boathouse into a hub for family bea... Similar to the elevated utensil concept, hanging your pots and pans from a ceiling-mounted rack keeps them nearby and easy... For windows, doors, and mirrors that could use a little definition, the Naples Etched Glass Border adds a decorative flora... The thyme growing between these stepping stones adds a heady fragrance to strolls along this lush, low-maintenance garden ... Decoupage is an easy way to add any paper design to your switch plate, whether it is wallpaper, scrapbook paper, book page... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... When securely fastened to a tree or the ceiling of a porch, a pallet and some cushioning make the ideal place to lounge. V... Reluctant to throw away any of those unidentified keys in your junk drawer? Hang them from a few chains attached to a simp... A stripped-down model, sans screened porch, starts out at $79,000. Add the porch, a heated floor for the bath, and all the... Salvaged boards in varying widths and colors make up the dramatic accent wall in this attic space. The high-gloss white of... Need a window and a door in a tight space? A Dutch door with a window may be your answer. These useful doors are split hor...
Follow_banner_a
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon
 
webapp2