How to stop water ingress under house through external brick wall?

[approachmhn]

 The external wall is single brick, I am getting water coming through the brickwork to crawl space under house when it rains .

I can get to both positive and negative sides of the water transfer.

Is there a suitable product to seal the wall on the outside or inside.

the upper part of external wall is rendered. So I think water ingress is through bottom where wall is not rendered and is covered by soil.

appreciate your suggestions

thanks.

 

 

[approachmhn]

Thank you @Dave-1 .

I don’t want to say  how many times i refer to Fixing water ingress issues in garage for the work i am doing around my home.  Cant thank you enough for that 🙏🏻.

I see you have used  https://www.bunnings.com.au/gripset-betta-1l-waterproofing-membrane-bitumen-rubber_p0960165 for waterproofing. 
May I know if I need to wait till brick wall is completely dry to paint this? Or a little moisture is fine?

I will do as you suggested for agi pipe I.e gravel till the top. And then some pavers on top to move as much water as possible towards driveway along the slope. 

Last time when I renewed storm water pipe, I saw there was an unconnected pipe. I believe that pipe is running under the concrete driveway. Need to start investigating from the kerb side. If I find that,  it will be easier to connect the agi pipe to storm water. 

So, for now I will just leave the agi pipe soak into ground around 3 metres away from wall.

i will let you know as I progress.

thanks.

[Dave-1]

Morning @approachmhn 

hahahha you made me smile! Thank you for the compliment

You will need to wait for the brickwork to be completly dry before using the bitumen paint, and it will stick to everything and I mean everything so be careful using it. It will clag the paintbrush like crazy. I can remember getting frustrated as I felt like I was rushing to get it on the surface before my paintbrush wouldnt work any more Maybe have a back up paintbrush handy. Oh and a cleaner for your hands

You could always push your hose up from the kerb stormwater pipe and see the distance it goes? you might be lucky and not get it caught on breakages or blockages. Twist the hose itself if you feel it getting jammed. Much like you would with the wire clearer for pipes you can get from bunnings.

Looking forward to seeinghow you go

Dave

[approachmhn]

Thank you @Dave-1 .

Good suggestions. That’s less stress.

May I please know how to check if bricks are completely dry?

Also, how long should I wait till I fill gravel back in the trench?

[Dave-1]

Afternoon @approachmhn 

Touch, just place your palm against the brick and if it feels damp then its a nope, Maybe wait until the sun is up for a couple of hours and check then?

You really dont need to wait to fill the gravel back in the trench, if you are refering to waiting for the bitumen to dry I would look at the container it comes in as I cant remember off the top of my head. I waited until the next day before I put gravel against it tho.

Dave

[approachmhn]

Thanks @Dave-1 .

May I know gravel you used. Is it 20-40 mm normal one or like scoria?

[Dave-1]

Afternoon @approachmhn 

I used 8mm gravel. you can order through bunnings as a bulk bag or there are 10kg bags I think available as well. The bulk order is cheaper tho. I had "estimated" the quantity of gravel I needed (yeah over confident and should have asked the gravel guys lol) and end up with pretty much three times what I needed. Good side I used it under my pavers and it has really worked for me.

The Bunnings bulk order uses a local sand and soil place. The price was about the same.

Dave

[approachmhn]

Thank you for all the details. @Dave-1.

one more question. I got the Ag pipe you mentioned in your post.

Slotted and Sleeved 100mm Ag-Pipe.

I need to put an  end cap on one side. If not dirt might get inside the pipe.

can you please suggest any options?

could not get much info at my local bunnings,  concerned person was on leave today. Also, I could not find anything that works.

Hope I don’t have more questions 😊

[EricL]

Hi @approachmhn 

I suggest pulling the sock forward and folding over the front of the agi pipe. You can then secure it using duct/cloth tape, once you bury it the soil will keep the sock in place. Please make sure not to fold or pinch the front of the agi pipe.

If you need further assistance, please let us know.

Eric

[Dave-1]

Evening @approachmhn 

never too many questions, when you dont ask questions, thats the point of when you stop learning!

So a couple of ways come to mind. 

This one allows you to install an inspection grate or cap depending. That way you can flush out the pipe if ut appears blocked.

Holman 100mm PVC DWV Finishing Collar Grate with a bit of a U bend at the end so the cap/grate is level in your yard. The pipe is very flexible and the collar will fit over the end.

Second way and is how I did my drain.

Everhard 1m EasyDRAIN Polymer Grate And Channel plus Everhard EasyDRAIN End Cap on the end of the corrorgated ag pipe. So you could cut the drain in half (there are end caps to fill the end to stop dirt coming in) and top side you have the one half, then pipe down to the end of your trench and then bring up the pipe to ground level and into the grate. It would provide an exit for excess water as well as access points if needed.

Third way is to use a couple of pits, top and bottom to do the same thing (probarlly look tidiest this way

Everhard EasyDRAIN Polymer Rainwater Pit Case You can get a metal grill or a plastic grill for these pits. You just need a large holesaw to cut a nice hole in the side is all. This would be my favoured option, second favorite option would be the first suggestion

Just re-read your question and the Everhard Easydrain End cap would do the job on its own I would say. (really didnt need to offer all three lol but no way am I deleting them now

Dave

[Dave-1]

Evening @approachmhn 

hahahahah Go with @EricL 's suggestion... So much better. Shaking my head at my over engineered answers

Dave