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Discussion Starter #1
Photos show removed degraded/loose foundation parging and exposed degraded mortar joints.
Used roto-hammer/chisel (4hr). Blocks are very dense/high aggregate content.
House: Split Level, 47 years old, Northeast US, approx 40" of foundation exposed entire perimeter.
Will do same repair on another side. Other walls in better shape.
Appreciate feedback for following plan that's based on internet info:
  • Verify all loose parging removed, and all loose joint mortar removed.
  • Powerwash wall.
  • Apply Type S mortar to degraded joints.
  • Apply Thorobond or Acryl 60 bonding agent to wall with brush.
  • Apply parging (Quickcrete Fiber Cement or Thoroseal) on a cloudy day.
  • Spray water to keep curing mortar damp approx 24hr.
  • Allow parging to cure 30 days of warm weather, then apply concrete sealer (water repellent).
Q's:
  • Approx half the parging is removed. Is considerable extra time to remove remaining well-adhered parging advised? ie: Would "clean slate" greatly improve repair quality and longevity? Goal = quality/longevity: at my age, this work not DIY many more yrs!
  • If leave adhered parging, is repair done in 2 layers, feathering first to level of original parging then final thin coat to cover entire wall?
  • Would a 2nd coat require prior 2nd application of bonding agent?
  • Max total depth for parging?
  • OK to work around power cable to A/C along bottom edge of vinyl siding? Removing brackets would require temp cable supports.
  • Replace 30% of water used to mix into mortar with liquid bonding agent to boost resilience?
  • Good DIY project, or better left to a pro after I prep walls?
Thanks for your time!
Surfin
 

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Discussion Starter #3
Stadry, thanks for your reply.
The provided plan notes that loose joint mortar will be removed and joints filled with Type S mortar prior to parging.
The cracks are an old issue -previously filled w/caulk (ie: not active).

Lived in this house >30yrs, filled the cracks long ago with no further issues.


Appreciate anyone with parging experience offering their perspective to either endorse or provide feedback to improve the repair plan.


Thanks for your time!
 

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After removing all loose or detached parging material.
(1) Than apply a product like STO Leveler to all areas were parging was removed.
(2) Apply STO RFP over the entire foundation, alternate to RFP use STO Flexyl
note Flexyl is very difficult to work with. Both will water proof the existing foundation wall.
(3) Apply A Synthetic Finish like STO STOSilco Lit color & texture of your choice, alternate use STO Stoco M I would go with STOSilco Lit.
Numbers 2 or 3 will bridge cracks & resist further cracking.
 

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Discussion Starter #5
Clarence, thanks for your reply!


Not familiar w/STO products, and not available locally.

I'm near Syracuse, and stocorp.com website indicates nearest distributor 1HR away.
Is STO primarily used by pros, but DIY homeowners can apply with no problem?

Are STO products superior enough to drive 1HR?
ie: Is there an acceptable alternative, or would products I listed work OK?


Thanks!
 

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Clarence, thanks for your reply!


Not familiar w/STO products, and not available locally.

I'm near Syracuse, and stocorp.com website indicates nearest distributor 1HR away.
Is STO primarily used by pros, but DIY homeowners can apply with no problem?

Are STO products superior enough to drive 1HR?
ie: Is there an acceptable alternative, or would products I listed work OK?


Thanks!
Most Synthetic basic products can be used by a DIY'er.
For other matching products check out these manufactures for matching products.
Dryvit
Parex
Masterwall
Total Wall
Surewall
I do prefer STO as I have used their products for over 40 years.
Call STO Corp Atlanta, GA. tell them what products you are interested in than ask if they can ship direct to you or a near by business.
Another idea is to call the STO distribitor that is one hour away & ask if they can drop ship to you on their next order.
If you select another manufacture make sure it is an equal product.
 
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