Home>Discussions>EXTERIORS>problem with concrete in basement
5 posts / 0 new
Last post
JerryGove
problem with concrete in basement

I am getting a white foam on surface of concrete floor near outside wall going out to newly installed patio. Have I created a moisture problem? How should I repair it?

My house is 14 years old and I never saw this problem on the concrete floor until after the patio was installed 3 years ago.

The house is in Massachusetts. Thanks for the help.

Re: problem with concrete in basement

Can you explain more about this white foam? How long have you noticed it? DO you notice any other signs of moisture?
___________
Networx.com
We provide the latest information on how to fix, renovate, and decorate your house using the least amount of resources for the best value.

canuk
Re: problem with concrete in basement
JerryGove wrote:

I am getting a white foam on surface of concrete floor near outside wall going out to newly installed patio. Have I created a moisture problem? How should I repair it?

My house is 14 years old and I never saw this problem on the concrete floor until after the patio was installed 3 years ago.

The house is in Massachusetts. Thanks for the help.

Sounds like it may be efflorescence. ( do a google search )
If this started after the patio installation sounds like that's the cause.

Hard to say what's happening but I would guess the patio might be directing water toward the floor. There seems to be a change in drainage around that area allowing water to be forced into the floor from underneath pushing the chemicals up forming the efflorescence.

Just a thought.

Hank Bauer
Re: problem with concrete in basement
canuk wrote:

Sounds like it may be efflorescence. ( do a google search )
If this started after the patio installation sounds like that's the cause.

Hard to say what's happening but I would guess the patio might be directing water toward the floor. There seems to be a change in drainage around that area allowing water to be forced into the floor from underneath pushing the chemicals up forming the efflorescence.

Just a thought.

I will agree with Canuk with one question have you ever used salt to deice the patio?

JerryGove
Re: problem with concrete in basement
JerryGove wrote:

I am getting a white foam on surface of concrete floor near outside wall going out to newly installed patio. Have I created a moisture problem? How should I repair it?

My house is 14 years old and I never saw this problem on the concrete floor until after the patio was installed 3 years ago.

The house is in Massachusetts. Thanks for the help.

I think that i created a moisture problem and have to put in some type of drainage and waterproof the concrete wall in the spring.

TV Listings

Find TV listings for This Old House and Ask This Old House in your area.