concrete block question

[Crow Hunter]

On the exposed part of my house foundation (it's a walkout) I had some concrete crumbling off the cement blocks. Not the mortar between, but off a couple of the blocks themselves. I attached metal lath in the divots and patched with cement. I would like to now paint all the exposed part of the wall with something to block the UV light and moisture completely. Is this a good idea and is there a recommended product? I did see a water blocking paint for cement at a home improvement store but I did not read the label to see if it is for exterior as well as interior walls. Thanks for any help. CH

[Bear55]

I don't know much but I did seal my block basement from the inside last year, the stuff I bought was good for interior or exterior use.

[birdswacker]

Call Brock White they specialize in masonry products. There off of 280 in St. Paul

[SFC]

Birdswacker is giving good advice,I would check with several Companies on what they would recomend, the latest and greatest changes all the time. Being that he threw out a name, I would check with CMI out of New Hope. Are your block crumbling right at grade level, if so it makes sense, if anywhere else I would be checking for the cause of the problem. Block dont usually just start to crumble, salt or constant moisture are usually the culprit. Dont just fix the problem try to identify the cause.

[Tom7227]

+1 on Brock White or similar - take some pictures and maybe even samples of the material that came off so they know exactly what you're looking at.

[Crow Hunter]

Most of the crumbling off starts at the grade level, but there is at least one spot that is up higher. It is a walkout and the problem is occuring at the higher level, not down at the bottom of the slope. There is a sheet of foam between the dirt and the wall that stops at the top of the dirt. Thanks for the replies/advice.

[Surface Tension]

Whenever I've seen this, water/moister was the common denominator.