Asphalt in Garage Problem

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  #1  
Old 10-20-18, 08:41 AM
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Asphalt in Garage Problem

Hi all,
When we blacktopped our driveway we had them continue the asphalt through and into the garage. Unfortunately the moisture comes up through the asphalt and makes the garage damp and musty. My first question would be, is there a product other than conventional driveway sealer that would block the moisture better? Second question, if there is no way to keep the moisture out that way, do you think that pouring cement over it would solve the problem and is it even possible?
Thank you in advance for any advice. I'm worried about having this turn into a serious mold problem.
 
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  #2  
Old 10-20-18, 08:56 AM
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One option is to remove the asphalt in the garage. Install a vapor barrier. Then pour a concrete slab on top.
 
  #3  
Old 10-20-18, 09:13 AM
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So it would seem that cement cannot just be poured over the asphalt? Is it possible to lay down a vapor barrier over the asphalt and pour the cement over it?
 
  #4  
Old 10-20-18, 09:34 AM
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Asphalt isn't a suitable base for concrete. Have you tried blacktop sealer to see if it helps any?
 
  #5  
Old 10-20-18, 02:54 PM
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Yes, it's been seal coated but perhaps another coat (thicker) may help. It would be worth a try as tearing up the asphalt would be a nightmare.
Thank you for your input!
 
  #6  
Old 10-21-18, 06:30 AM
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You could try another layer of sealer, but I wouldn't hold out much hope. But sealer is cheap and probably worth a try.

Just an FYI, asphalt is not allowed by code in a garage. It can only be used in a carport open on at least two sides or outside. The reason is that it easily absorbs flammable materials and is a fire hazard.
 
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