Rubberized waterproofing or dimpled wrap on block foundation

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  #1  
Old 04-19-19, 02:46 AM
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Rubberized waterproofing or dimpled wrap on block foundation

My garage is a block foundation . I want to water proof it . Should I do dimple wrap or rubberized coating ...
How long will the coating last and my concern is doesnt water still get behind the wrap and into the garage /between the blocks??
 
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Old 04-19-19, 04:37 AM
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Those are two different products and are often used together. It's not either or. One is applied to the foundation wall as a damp proofer to stop water from seeping through the wall. The other is applied on top of the damp proofing layer to provide a air gap for the water to drain down the wall and into a drainage pipe to be carried away.
 
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Old 04-19-19, 07:27 AM
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Cause I had someone suggest using the miradrain on it's own???

how long does the water proofing last
 
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Old 04-19-19, 08:03 AM
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All you have to do is research that product. Carlisle's instructions clearly show that their miradrain products are applied over a damp/waterproof barrier. The miraDRAIN just like it's name is a drainage system. Not a waterproof barrier.

How long waterproofing lasts depends on what type. There are many, many different types of waterproofing. Some last longer than others and a lot has to depend on the installation.
 
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Old 04-19-19, 08:10 AM
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I'm trying to make this block foundation last longer it's from the 60s and water is coming thru. So I dunno if I should do complete miradrain ., parge all the way down (it's only 1ft below grade ) or some other type of water proofing ...

Any idea how long some of the water proofing last??

Thx
 
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Old 04-19-19, 10:23 AM
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You have not said what waterproofing you are considering so nobody can comment on how long something unknown will last. If done properly most products could last a human lifetime, some longer. If installed improperly waterproofing might not work right from the beginning. On an older structure a good bit of the work is going to be cleaning and preparing the surface so whatever waterproofing you choose can stick and seal properly.
 
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Old 04-19-19, 12:21 PM
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I dunno which one. I'm a newbie .
 
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Old 04-20-19, 04:49 AM
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Ask around and see what's used in your area. My house has a rubberized tar like coating. It was painted on like thick tar and it cured/dried to a thick rubbery/tar coating. That is the barrier that helps keep water out but it's not a totally impervious barrier. It mostly keeps water out but it won't turn your building into a boat. Water cannot be allowed to accumulate outside the foundation as the water pressure will find a way to force through the barrier.

So, it's important to also have proper drainage to keep water away from the building. Surface grading to have water run away is the first line of defense. Then there is a drainage system around the perimeter of the building. The foundation wall is either wrapped with a dimpled plastic that holds the soil away from the building and creates a hollow space for any water to easily drain down to the drainage pipe. In my area a layer of clean crushed stone is commonly used instead of the dimpled plastic as water can easily percolate through the stone and down to the drainage pipe.
 
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