Exterior Concrete Wall Paint

[tonyciambrone]

I know this isn't exactly flooring but the concept is pretty similar..

I have a large building with exterior concrete the first ~5 feet up. There's a lot of spalling and chipped sections, a few vertical cracks, rust staining etc. I started to pressure wash all the algae'd sections and want to thoroughly clean and patch all the walls to make them smooth again.

I am thinking it will look awfully goofy with all the patched portions afterwards. SO, I want to paint it all... I know it will not be cheap or quick.
Does anyone have experience doing a project like this?

I am looking for recommendations on what to use to patch vertical sections (I read very mixed reviews on almost all concrete patch products) and what product will hold up well over time to paint the outside (preferably gray.)

Thanks

 

[strutaeng]

Why is it spalling? Is water leaking or condensing? How about freeze-thaw damage? Is the concrete insulated on the inside?

If it is just spalling from workmanship, any repair mortar designed for vertical troweling will work. SIKA makes so many different types, some require a 1/4" shoulder and some can be applied to a "feather edge." Also look at prep/primer requirements. Seal larger cracks with a polyurethane sealant.

Apply an elastomeric and will should last for a long time.

Above all, follow the technical data sheets.

 

[ard]

Might also consider two part polyurea type paint.

 

[tonyciambrone]

Why is it spalling? Is water leaking or condensing? How about freeze-thaw damage? Is the concrete insulated on the inside?

Apply an elastomeric and will should last for a long time.

Above all, follow the technical data sheets.

Water is not leaking. There are some points where two sections meet where it looks like freeze-thaw damage. But I can't recall them getting any worse over the past ~7 years.

I believe it spalled or is spalling because the building was owned and probably built by a concrete contractor. I believe they used the leftovers from Jobsite trucks as they went. Concrete was probably a little hot and in the truck a little long. The property is several acres...almost all of it is poured concrete.

 

[strutaeng]

I see. Any of there should work:

http://usa.sika.com/en/solutions_pr...2/02a002sa01/02a002sa02300/02a002sa02302.html