Thursday, October 24, 2013

Flexicore concrete panel repairs with Legacy Industrial products.

Hollow-core or Flexicore is a type of precast, pre-stressed concrete floor slab.  Very popular in multi-story residential and commercial construction.  It can also be used as a garage floor to create subterranean living or storage spaces.  When used in this manner it is common for a conventional slab to be poured over the Flexicore "floor".  This pour should be isolated from the "sub-floor" using a 60 mil poly-membrane.  This membrane allows the slabs to move independently, minimizing cracking and acts as a waterproof barrier if they do crack.  When this membrane is compromised or absent from construction it is very possible for water/liquids to drift from the garage space to the lower level through the floor.

Profile view of hollow-core panel- from Wikipedia.


Here are some tips to either stop or minimize this leaking:

  • Grind the entire floor, removing all sealers/coatings
  • Chase any cracks with a crack-chasing blade mounted on an angle grinder
  • Fill cracks with a flexible yet hard epoxy crack filler-LINK TO PRODUCT
  • Grind epoxy filler flush upon full cure
  • Coat the floor with a flexible, bridging primer- LINK TO PRODUCT
  • Allow to cure and topcoat with an appropriate topcoat-LINK TO PRODUCT
  • It is possible to make (2) coats of the bridging primer in lieu of topcoat.
Allow coatings to fully cure approx. 7 days before allowing motorized traffic to occur.

If executed properly and further substrate movement is minimal, this system will allow for care-free use of liquids on the garage floor level.  However, if movement is substantial, a scrim membrane may need to be implemented into the system for greater movement allowance.

This system is intended to help prevent liquids from moving between floors.  This is not a "structural repair" nor is it guaranteed to waterproof.  Please consult a licensed engineer for any structural repair or waterproofing recommendations.


1 comment:

  1. Extremely happy with the palmbeachepoxypros result, thank you for producing our storage area look so awesome! I am fairly certain we certainly have the nicest storage area! I am delighted that people selected to get the storage area appropriately done as there is no chance the standard could have been remotely related, we had been at first debating on getting the garage area expertly completed or performing the car port epoxy yourself!

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