View Full Version : Sand for crawl space?

09-11-2006, 07:37 AM
Can I just dump a bunch of bags of sand into my crawlspace to eliminate the low spots? I know where the moisture is comin in at and where it flows to once in the crawlspace. Won't sand solve this?

Or even just some bags of quick drying cement? Just dump a bunch of bags to cover the area and then mist it with water? I'm looking for a quick fix here.

09-11-2006, 10:02 AM
Just got a quote from neutocrete. It's alot of money. More money than I want to spend on this. I don't need a french drain. I don't need a sump pump.

I just need to fill the low spots with something hard. The rest of my crawl space looks like it is at grade or higher. It's just this one section. And luckily it's uncovered.

09-11-2006, 03:13 PM
I'd think sand would just stay damp.....but maybe your ground there is mostly sand ? Here, our crawl spaces are usually red clay.....and any water that gets in sits there until it evaporates.

If you use concrete mix, you don't even have to spray it.....it will set up just from the availiable moisture.

09-11-2006, 07:43 PM
Awesome. I had a feeling sand might be the wrong way to go.

Soil down here is just sandy dirt. No clay. My main goal is just to raise the low spots. Other parts of my crawl space are higher.

I hadn't even thought about the pre-mix setting up on it's own. I guess it would as humid as it is down here right now.

My plumber is coming out tomorrow. I'm going to have him attach all my new pipes to the bottom of my joists so they're up off the ground. Minus my drainage pipes of course.

09-11-2006, 07:47 PM
I'm guessing i'll need about 20-50lb bags. I'll wing it. If I need more...i'll get more.

09-14-2006, 12:35 PM
Is the low spot close to an outside wall? Put a sump pump pit in it? Just a thought.

09-14-2006, 12:39 PM
I think i've figured out how to solve the whole issue. Just block the source.

With the plumbers being there for the past 2 days the source has been blcked and the crawlspace has dryed out and stayed dry.

09-14-2006, 12:59 PM
I don't see what sand gets you. With low spots bare, you'd have water, right? With sand filling in low spots, you'd have wet sand. Who cares? Heck, use 2" aggregate if you wish. At least it's a capillary break, and less likely to host bugs I'd think.

09-14-2006, 05:50 PM
Haven't had any water in there for three days now. And we've had TONS of rain. At least until the plumbers forgot to glue one of the caps. We were all there when it blew. No big deal. They shut the water off glued it and checked every other connection they had made. The pipe probably only dumped a gallon of water before they shut it off. I think that spot (where water was entering the crawl space) just needed to be blocked is all. We've got to pour a short 14" ish knee wall Saturday. Then we can rebuild two walls and Sunday we can screw down the sub floor.

Good news is my pressure rocks!!

09-14-2006, 08:26 PM
Sounds like once you get the done and with the gutter shoots, grading you'll have it whipped.

That low spot wasn't the start of a sink hole was it? :cry:

09-14-2006, 08:48 PM
Naw. Just a low spot. There's depressions in various spots all over my area. I'm in an older neighborhood before people starting using fill to raise their homes. Most homes are on crawlspaces like mine or raised slabs.