Foundation Parging - Sill, Concrete Repair - Toronto Area

Foundation Parging

Foundation Parging - Concrete RepairThe concrete foundation walls of your house may show rusted foundation ties, honeycombing, or cracks caused by shifts in your foundation which are more susceptible to water infiltration and ultimately, damage. Crumbling front steps and corners are also eye sores and can lead to further decay. Parging acts as a barrier protecting the underlying blocks and helping to give the foundation a clean consistent appearance since it hides the imperfections in the foundation surface. It will also beautify the appearance of your home leading to higher resale value and reducing the possibility of home inspection resale nightmares. Spend a little now...or a lot later. Staining and painting are also added possibilities to the concrete surfaces for added personalization.

Parge coat (concrete): A thin coat of a cementitious or polymeric mortar applied to concrete for refinement of the surface. The typical parge coat is 1/32"-1/16" in thickness; this may be less than the minimum thickness allowed by many mortar types.

The intent is to create a contiguous surface by filling surface air voids and bugholes (eliminating bughole-induced outgassing) and to level concrete with extreme rugosity to a level suitable for topcoating with a high-performance protective coating.

Parging is the process of applying thin layers of a Portland waterproof cement mixture on a block foundation wall for weatherproofing purposes. The mixture, consisting of water, sand, Portland waterproof cement and sometimes a liquid concrete weld adhesive, is applied to the foundation wall surface with a trowel. The foundation surface must be clean and dry, meaning that dirt, paint, and foundation tar should be removed from the area prior to applying the cement mixture. Once applied, the wall surface must be allowed to dry. However, during the next few days, very little water should be used to moisten the cement mixture to assist in its curing process and not allow the cement blocks underneath to suck the water out of the mixture. If the blocks are allowed to do this, the cement layer can weaken and crack.

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