Salt bursting through painted concrete block wall

[DavidCB]

Before you do anything you must accurately define/locate the cause, otherwise you will make it harder if you do the wrong thing. You need the services of a specialist Building Repair contractor not just some Handy man.

[DavidCB]

I have used Penetron that is refered to above with reasonable sucess but you still need to locate the cause first.

[drelly]

^^ What he said. If you don't figure out where the water is coming from before sealing eveything, you might end up creating a wall full of water.

[DavidCB]

Try Building Repairs Ltd on Auckland 416 7013 or a similar specialist

[Maccachic]

Get one of these guys they specialise in Building pathology http://www.buildingsurveyors.co.nz/panel/membersnear

[whitt]

^^ What he said. If you don't figure out where the water is coming from before sealing everything, you might end up creating a wall full of water.

Although the beauty of using a product like Penetron from the inside is. You get similar results like you would have tanking the wall from the outside. Penetron can penetrate a substantial distance ( up to a metre from mem) and completely seal blocks internal structure. Meaning no wall full of water if done correctly.

http://www.cemix.co.nz/userfiles/Penetron_Crystal_DATA_SHEET.pdf

watch this video and see how Penetron works

http://www.penetron.com/en/

Having used it myself it is great IMHO

[Maccachic]

I think you missed the point you are only addressing the symptoms not the cause. You could just be moving the issue to another area.

[drelly]

Although the beauty of using a product like Penetron from the inside is. You get similar results like you would have tanking the wall from the outside. Penetron can penetrate a substantial distance ( up to a metre from mem) and completely seal blocks internal structure. Meaning no wall full of water if done correctly.

That's exactly my point... if you had a leaky roof or a leaky second story where the water is running down inside the blocks, after it's so well sealed, it can't get out.

[whitt]

I agree too, you should first eliminate the possibility water is entering from elsewhere like a leaky roof etc first.

Most basement block leaks are from moisture externally entering outside of blocks thru poor or failed tanking etc.
Typically to remedy these you often need dig up the dirt against house blocks. This gets expensive and time consuming and can be not practicle if you have gardens etc in place.

[DavidCB]

Get a Building Surveyor in before you do anything

[whitt]

Get a Building Surveyor in before you do anything

or maybe an Architect?

I would go an experienced builder or waterproof specialist who has dealt with the issue numerous times previously myself.

I use:
SSC Watertight Technologies PO Box 121 151, Henderson West Auckland, Phone: 09 416 1200. 021 479 607
[email protected], Chris Eden