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
1916 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
314 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

Don't overlook coasters as a way to scatter small pops of color and style around a room. If you love monograms, why not dr... Reused steel windows create an eye-catching splashguard in this walk-in shower. The vintage factory windows bring an inter... A galvanized steel tub is a surprising but charming fixture in this bright and breezy screened patio. It's perfect for was... If you're not crazy about the idea of commingling plants and pool, this modern variation may be more to your liking. The s... Yes, a freestanding garage can become its own tiny house. Artist Michelle de la Vega has all the comforts of a modern resi... If you lack plumbing skills but have a good sturdy tree, here's the easiest outdoor shower solution of all: Simply attach... Pursue what's known as the stack effect. To achieve it, open the windows on both the upper and lower floors, and as warm a... How do you like this smart use for an old bottle? Clamp an empty wine bottle to a fence or wall near your outdoor deck or ... Simple and striking, a couple of pieces of "lovingly used" furniture creates a special kind of charm. A weathered chair fo... 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... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... For the cost of a can of exterior paint , you can totally transform your porch. Paint the floor a hue that complements yo... Repurpose birthday hats to create a string of lanterns for your porch, patio, or garden. Cut the tip of the cone, punch h... 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