Can I shim a synthetic pad?
#1
Member
Thread Starter
Can I shim a synthetic pad?
https://www.grainger.com/product/DIV...rchQuery=4e873
Its going to sit on poured concrete which has a bit of a slope.
Think this could be shimmed properly so the middle doesnt "sag"?
The tank that will sit on top weighs about 1500 pounds.
Looks square in the pics but the pad's dimensions are actually 48"x36"x2"
Its going to sit on poured concrete which has a bit of a slope.
Think this could be shimmed properly so the middle doesnt "sag"?
The tank that will sit on top weighs about 1500 pounds.
Looks square in the pics but the pad's dimensions are actually 48"x36"x2"

#2
Group Moderator
If the pad is totally supported by the concrete pad underneath how will it sag in the middle?
#5
Member
Thread Starter
Its an upright Roth oil tank.
I want the pad to ensure that the tank is clear of any standing water that sometimes accumulates after heavy rain.
#6
Member
Thread Starter
The concrete has a slight slope to it.
If the end of the pad is shimmed, I'm thinking that the middle might sag.
#7
Member
Thread Starter
I believe the bottom of the pad looks like this, not sure if this will present a problem for the mortar.

#8
Member
Thread Starter
I'm also being told that I cant pour a concrete pad on top of already existing concrete because it will have no room to expand.
Can someone confirm?
Can someone confirm?
#9
Forum Topic Moderator
You can pour concrete over old concrete but if the overlayed part is less than 2" there can be bonding issues. When doing that it's best if the new pad is larger than the existing with the edges of the new being 4" thick or so.