Question: Howdy Robert, You’ve helped me Prior to now and hoping You will Have The power To understand this as quickly as extra. I’ve forwarded you An picture of my driveway And might ship you ancompletely different picture in ancompletely different e-mail. I am not very technical on computer systems, sorry. Are you able to inform what these marks are on the driveway? They Appear to be water marks to me, however are on the concrete On A daily basis, not solely after rain. Additionally, Inside The subsequent picture the concrete turned darkish in some places shut to the storage door. I even Want to know what I ought to do about this, if something. 

Thanks Tons for serving to me out now and Prior to now, I study your articles every week and study a lot. Search for The subsequent e-mail and The completely different picture. Barbara O. 

Reply: Thanks for being a loyal studyer. The white substance I see is phosphorous, That are mineral deposits Inside the water. Simply broom or wash that dpersonal — it isn’t A drawback. That is typical after rains have happenred — static strain pushes the water up from out of The underside and leaves the mineral deposits Similar to you see. 

It might happen all by way of non-moist occasions as properly, probably if The world is low-mendacity. This Is Sort of widespstudy; we even see this inside storages, usually if the moisture barrier, the visqueen, is compromised. The good information is that it appears like this is beauty solely. 

Robert Lamoureux has Greater than 40 years of expertise as a widespstudy contractor, with separate licenses in electrical and plumbing contracting. He personals IMS Enchancment Inc. in Valencia. Howdys opinions are …….

Source: https://signalscv.com/2022/03/robert-lamoureux-are-driveway-marks-cause-for-alarm/