pouring over an old slab


  #1  
Old 02-17-10, 07:19 AM
S
Member
Thread Starter
Join Date: Feb 2010
Posts: 1
Upvotes: 0
Received 0 Upvotes on 0 Posts
pouring over an old slab

I have some 29.2'x16" bar joist that I want to use to expand my old carport that was poured back in the late 70's. Slab is in good condition about 14x16. I want to expand the size (20x30) and do a complete pour over the old slab (to get more elevation). If I am understanding right, I need to prepare the area and put a vapor barrier over the whole pour area, including the old slab?
 
  #2  
Old 02-17-10, 05:48 PM
P
Temporarily Suspended
Join Date: Jul 2008
Location: NY
Posts: 10,265
Upvotes: 0
Received 0 Upvotes on 0 Posts
Is that a studebaker hawk or a studebaker lark?

I don't know about the vapor barrier. What's more important is how much height do you want to add? As far as I know, you need to go at least 2 or 3 inches higher.
 
  #3  
Old 02-19-10, 07:10 PM
badeyeben's Avatar
Member
Join Date: Dec 2006
Location: Southern ILLINOIS
Posts: 1,182
Received 59 Upvotes on 53 Posts
I think you would need the vapor barrier under the new addition for sure. If the old slab does not draw moisture to the surface now it probably does not need a vapor barrier under it.
But the plastic is cheap and it won't hurt anything for it to be over the old slab. I would put it under the whole thing and be sure you allow for proper drainage on the new addition.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description: