So the builder and the plumber had a few words yesterday morning. I could not make out much and I was trying to stay out of the hole thing - but what I did here was that the builder wants the front of the house dug up so the patch can be done right. Not sure the plumber is going to like digging into 4' of clay and mud.
I also sent a copy of this link to Ardex and received a reply back that my approach is nothing more than a band aid and the builder needs to fix it better. I was told Ardex does have a solution for this kind of a repair and I'm heading to my supplier now to see if they stock the product.
Here is a part of the email from Ardex's Robert Russell;
....We do have a waterproofing material in our arsenal of products called ARDICOAT PLUS that will provide a long term waterproofing solution. It is part of our Engineered Concrete Repair System products. Check it out on line at www.ardex.com
Give me a call if you have any questions.
Regional Sales Manager, Western Canada
I have not seen the Ardicoat Plus but will try and get my hands on some today.