Replies

1. 
   Guest_ | May 21, 1999 08:37pm | #1

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   Hi Francis

   Parging is neither.

   The foundation still requires a coating of dampproofing or a coating of waterproofing membrane.

   Gabe

1. 
   Guest_ | May 22, 1999 06:17am | #2

   *So, what is the purpose of parging block? Sometimes, it's done above grade for appearance - what about below grade?

2. 
   francis_scavo | May 22, 1999 06:32pm | #3

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   Hi Matt
   Was quickly talking to building insp. and I thought he told me that for the basement to be living space it needed to have the exterior walls to be parged, waterproffed and plastic.
   Francis

1. 
   francis_scavo | May 22, 1999 06:35pm | #4

   *Gabe Do you know what the mixture of parge is?Francis

3. 
   Guest_ | May 22, 1999 06:49pm | #5

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   Hi Francis

   I think there's a breakdown in communications with your building inspector.

   Parging is a cosmetic application to a house. Because it's a final finish to your house's appearance, I would strongly suggest that you have a pro do it.

   With regards to the waterproofing, there are many different methods. Not all are approved for every jurisdictions, so you should ask your inspector, which are in your locality. Here we use a plastic membrane that is mechanically fastened to the wall and being corrugated, allows the water to seep down to the weepers.

   Regardless of the system we use, I always install damproofing on the exterior anyways. Waterproofing and damproofing are not the same.

   Hope this helps

   Gabe

1. 
   Guest_ | May 23, 1999 08:43pm | #6

   *Francis. Gabe is partially correct. Parging is a 3/4-inch or thicker coating of mortar trowelled onto the exerior of the concrete masonry blocks CMB. Why? The pores in the CMBs are too large for bitumen-asphalt-or other liquid to seal. Thus the parging. However, the parging must also be dampproofed to seal the capillaries. Unfortunately, if the blocks crack the parge cracks and moisture enters. If you opt for this combination use an emulsion type dampproofing rather than conventional cut-backs asphalt which is high in VOCs. GeneL.

4. 
   Ray_Eifel | May 24, 1999 05:12am | #7

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   Gabe:
   Help me out with a brief definition that delineates between damproofing and waterproofing and which one would you do?

   All my quoates i've recently gotten for a project parge first, then they start adding on the layers.

   A brief comment would be appreciated.

5. 
   Guest_ | May 24, 1999 05:58am | #8

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   Good Evening Ray

   Damproofing is meant to prevent the ground moisture from permeating into the masonry or concrete walls. A foundation that doesn't have damproofing will normally have a moisture buildup on the inside after a rain or change in temperature.

   Unfortunately, if cracks develope, as a result of shrinkage or structural failure or even the seal around the tie rods fail, water will seep into your foundation.

   To help prevent this, you can install a membrane type waterproofing on the exterior of the wall, or you can use Platon installed around the perimeter, or you can use one of the directional insulating wall boards that directs the water downwards to your weepers.

   As I indicated before, I always install Damproofing first and then platon. It's a corrugated plastic that protects the damproofing, keeps an air space between the soil and the wall and directs the water down to the weeping system.

   Hope this helps

   Gabe

6. 
   francis_scavo | May 24, 1999 06:01am | #9

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   When you parge a concrete block basement
   below ground. Is the walls waterproofed
   or water resistant? What is the right mixture to use?
   Thanks