Putting SBC on the foundation exterior

I had arranged to travel to Windsor on Tuesday Sept 23 to pick up my son Rafael, who was auditioning for the Assistant pricipal cello position with the Windsor Symphony Orchestra (He won the position) and brought him back to show him the project, fed him supper, and put him on the train in Glencoe to get him back to Toronto by 10:30 PM. I then spent the next two days doing stuff in London, and attending Ed Brown’s presentation at University of Western Ontario.

Finally on Friday I was ready to begin to work applying surface bonding cement to the walls. This is part of the drystack building technology, the stacked blocks are cemented on both sides of the block with a special mortar made up of portland cement, lime, fiber (in my case special Polyvinyl Alcohol fibers) and a polymer additive Acryl 60, which waterproofs the layer even more, and adds to the bonding and flexibility. Rather than buy ready made SBC. I made up the batches ahead weighing out the dry ingredients putting them in plastic bags, which were then mixed with water and and the liquid additive and the mixture sprayed on the walls. The initial 2 batches were made without sand added to the mix. This was one of the options in the literature for SBC. However, I found the mixture was hard to handle and get on the wall evenly. Decided to try the formula for adding sand to the mix and see if it worked better. It did and now that is my default formula for the SBC. I have enough brick sand left from mortaring the first course of blocks to do my SBC for the foundation.

Sunday afternoon, I coated the long wall on the north, and all but 4 ft of the west wall before running out of SBC. I will have to run into London Monday morning and get more cement additive, I misjudged how much I would need.

Finished SBC on outside of garage foundation

Finished SBC on outside of garage foundation

Me, with mask, goggles, rubber gloves, and mortar sprayer.

Me, with mask, goggles, rubber gloves, and mortar sprayer.

Close-up of the mortar sprayer

Close-up of the mortar sprayer

The working edge of SBC application moving along the wall

The working edge of SBC application moving along the wall

 Tuesday, Sept 30, finished the SBC on the house foundation.   Need to keep it moist for a few
days of curing, and then line up the people for insulation spray, backfilling and plumbing-wiring work.
  The time window is getting short for finishing the slab before it gets too cold.
East foundation wall with SBC

East foundation wall with SBC

North foundation wall with SBC

North foundation wall with SBC


South foundation wall  with SBC

South foundation wall with SBC

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