How to waterproof external wall?

[tom138]

Hey everyone,

I am hoping to get some advise re waterproofing this external wall before I get a concrete path. 

As you can hopefully see from the picture above I have exposed the footer and was planning to use this waterproofer  but thought I’d check first whether is it the right product for this job. Or is there anything more suitable? 

Few other questions I have:

- how do I prepare the surface before applying the membrane? There is obviously still traces of dirt and stuff and I at first I wanted to use a pressure washer to clean it but not sure whether is it a good idea and whether am I going to loosen up some of the old mortar. Also if I pressure wash it now it might not get dry before the next rain and I wanted to take advantage of the few days with no rain on the forecast. Could I just get away with using a brush or wire brush to get rid of the dirt?

- do I need a primer/sealant?

- where do I apply the membrane? From the footer to the dampcourse?

Any advise is much appreciated!

Thanks,

Tom

[Jason]

Hi @tom138,

I would imagine many community members will recommend getting professional advice, but let me tag some experienced members for you: @Nailbag, @JDE, @Jewelleryrescue, @DIY4Knuckleheds.

One of our resident Bunnings D.I.Y. experts will also be happy to assist as soon as possible.

Jason

[Dave-1]

Morning @tom138 

I was having water enter my garage via the bottommost course of bricks so I used this product gripset betta 4l bitumen rubber waterproofing membrane and it has stood up fine. I am not 100% sure how it will go next to wet concrete Might be worth looking into reactions ect) but it totally stopped my leaks.

Note - It is super sticky and claggy. And stands out in colour I would only waterproof teh bricks up to your new concrete level.

I would also clean the bricks first, loose masonary bits should be removed whichever way beefore whatever you apply as it will cause issues down the track potentially. If it takes an extra week, then you know you have done a proper job and it wont fail down the track. I always get my timelines out of wack  

My project where I sealed the bricks. Its the last step if you want to jump to it. Gabion Wall to stop water ingress to garage 

Dave