Painting Concrete Basement Walls.

RoSSco

I have a customer who wants their basesment walls painted and waterproofed with something along the lines of UGL DRYLOK. UGL recomends there product to be used only on bare masonry. Two of the walls in the basment look like they have been painted several years ago, most likely with just normal latex paint. The paint is not chipping or pealing and looks like it is pretty well soaked into the concrete. I know it would be a pain in the ass to remove it so i really want to just go over it.
Anyone have any expirience with UGL Drylok? Is it any good? Do you think it will be okay to use it over the two walls that look previously painted? Any advise would be greatly appreciated.
Note: These are poured concrete walls not blocks. There are no leakeage or seapage problems but the HO say they want their walls waterproofed and would like some of the imprefections filled in. Also they are not finishing the basement they are just getting an epoxy floor, and want the walls coated with UGL and a coat of normal latex paint.

plazaman

block filler and loxon topcoat?

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chris n

It says right on the can it is NOT to be used over previously painted surfaces.

XanadooLTD

true. drylock needs to be soaked into the block. It wont go thorugh if it is painted. I think thoroseal will though. Govt guidelines let us paint block with thoroseal painted or not.

scrapecc

You can not waterproof a basement with paint. That may be something you want to bring up to them just as a liability reason!

izzy

Drylock says you can

Frankawitz

I have used Drylock and Thoro-seal and they only work on unpainted brick, block and cement, if there are any signs of water leaks in the painted areas you will be screwed, the Drylock and thoro-seal wont work and they will not Guarantee it, so I would tell your customer that, as for the unpainted block put two coats on, then you can paint if you want. they both work good, I had to do my basement when I bought my house had real bad water leaks, it's been 16 years and it still hasn't leaked.

plazaman

we used thoroseal numerous times... purely for aesthetics, usually in flip houses

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daidanmcg

UGL has to be brushed on for the first coat so keep that in mind...try and find something that can be rolled both coats.

it cant go over previously painted because the guarantee would be void...not that the guarantee really holds true either way!

i get most of my stuff at HD and they have something for this. hope that helps.

That Dude

I'd hit it with Loxon, SherCrete, or H&C Solid stain...good luck.

AbnerWright

You can use waterproof paint in basement as it will protect strong pillars of the house from dampness. I have used waterproof paint in my house and searched out good results. Previously, I have noticed some humidity in the basement but after using waterproof paint issue reduced to its maximum.

Ole34

i laugh when people want to ''waterproof'' their basement from the ''inside'' ..........eventually you run out fingers and the dam breaks

Willy is

If you've ever seen a basement wall collapse due to water pressure you know the power of water.

The products can help but "waterproof" may be a misnomer.

When people have water issues they often have a series of problems and solutions; many of them are expensive. They want a 20 dollar per gallon solution.

To some extent if you can sell an upgrade they may end up being happier;
fix drainage issues
exterior foundation work
pointing of bricks or block
parging of basement walls
possibly interior solutions for when water gets in, such as channeling to a drain.

Yes, this is more money but I've seen moldy studs pressed against damp/leaky walls holding up insulation. You may be looking at a failed basement finishing job, not to mention potential liability w/ mold issues.

willy