Home>Discussions>EXTERIORS>white chalky substance on brick outside
6 posts / 0 new
Last post
Jason
white chalky substance on brick outside

I've lived in the house for 17 years.  Recently I noticed this white chalky substance is starting to appear on the brick.  Any ideas what might be causing this?

Thanks,

Jason

Attachment: 
Clarence
Re: white chalky substance on brick outside

It is called effervescence it is caused by water ? moisture migrating thru the masonry when the moisture evaporates the salts remain behind. you can clean with vinegar than rinse well when dry use a good masonry sealer.

Do you have a sprinkler system that wets that area?

Jason
Re: white chalky substance on brick outside
Clarence wrote:

It is called effervescence it is caused by water ? moisture migrating thru the masonry when the moisture evaporates the salts remain behind. you can clean with vinegar than rinse well when dry use a good masonry sealer.

Do you have a sprinkler system that wets that area?

Hmmm... No, I don't have any sprinkler system near by at all.  There must be some other weird leak in that area which is scary.

Thanks for the remedy.  I'll do those steps to clean and protect ASAP.

Jason
Re: white chalky substance on brick outside

It looks like water is seeping into the brick wall from somewhere, unknown...  I don't have any pipes nearby and I don't have a sprinkler. So, I am guessing there is a leak in a window sill, brick or roof somehow.

Who would be the best person to trace a water leak down?  A brick specialist?  A roofing person?  A home inspector?  Do they need a special tool to detect a leak in the wall?

 

Clarence
Re: white chalky substance on brick outside

It looks like you have what is called wicking water.

Water is drawn up from the ground thru the brick.

A good home inspector would be your best bet. How much rain have you had ? You do have a moisture problem in that area.

 

Jason
Re: white chalky substance on brick outside

We haven't had much rain in Colorado.  It is only 50% snow pack right now. 

I turn the water OFF in the winter to prevent the pipes from freezing and there is a tiny drip coming from the open spicket.  The ground is wet, so maybe it is bad enough that it is the problem.  Thanks, I will get an inspector to take a look.

Sponsored Stories

TV Listings

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