12:08PM | 05/28/06
Member Since: 05/27/06
1 lifetime posts
I have a house built in the mid 1800's that my wife and I renovated about ten years ago. Below the house we have about four feet of crawl space. We noticed mold growing on the bottom of the floor last year. At that time we vented the foundation on all four sides. The groung is dry and has plastic on top of the dirt(changed that out when we vented it). The mold got better when we put the foundation vents in but is there again. We are also having problems with the duct work under the house; a few of the ducts have fallen off of the vents and the guy that put the last one up said that they were wet event though the ground is not.

My questions are:

(1) What should one do to get rid of the mold?

(2) Could the problems with the shotty duct be causing the mold and cooling problems that we are discovering this spring?

thank you,



02:48PM | 05/28/06
Member Since: 04/25/05
1918 lifetime posts
You did not give you location (climate).

But most likely you are getting moist warm outside air in and it is condensing on the cool ducts.

Moiture can also be coming in through the foundation walls.

And even "dry" soil can release a lot of moisture.

The vapor barrier needs to be SEALED.

And block up the vents.

Do a google for Conditioned Crawlspace or Sealed Crawlspace you will find lots of info.

Here are a couple of links.

Glenn Good

01:08PM | 09/29/06
Member Since: 09/10/03
320 lifetime posts
Beware of closed or sealed crawl spaces. While they can and do work very well in some instances there is the potential for serious problems if the work is not done properly. You must also beware if your HVAC unit is under the house or if a water heater using combustible fuel is located under the house. A closed or sealed crawl space can be very dangerous if either of these conditions are encountered.

Another less expensive and easier solution could be to insure your ducts are well insulated and sealed under the house. This will keep the condensation out of the ductwork.

Sealed and closed crawlspaces are still relatively new and only expert installation is recommended by companies specializing in there installation. There are a great many variables that can affect their effectiveness and safety.


Moderator: Construction Systems, Foundations, and Masonry & Stone

For more information about me, my qualifications, and/or home inspections please visit my website at:


Post a reply as Anonymous

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


type the code from the image


Post_new_button or Login_button

A simple banquette piled with pillows and lit from above with a wall sconce is a tempting spot to curl up with a favorite ... 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... This garden shed has been decked out to the nines. Designer Orla Kiely created the intimate home for a flower trade show, ...
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon