Is There A Problem Pouring Concrete Over Existing Bay Slab

[Buzzie8]

I am considering closing in one of may bays at my older wash and do not want the dramatic slope that goes to the pit. I was thinking I could fill the pit in with gravel and pour a few inches of concrete over the existing bay concrete. Is there a problem in doing this?

 

[cantbreak80]

Several operators in my universe have overpoured their bays to install new floor heat tubing.

With good planning, it can save thousands of dollars in demolition and hauling expense.

 

[Ric]

Several operators in my universe have overpoured their bays to install new floor heat tubing.

With good planning, it can save thousands of dollars in demolition and hauling expense.

I did exactly that at one of my washes 20 years ago. It is still going strong and looking good.

 

[chewy007]

Pouring Concrete over existing slab

I have done this in several of our carwash locations to install new floor heat tubing and to create a flatter surface. Use a strong concrete mix 7 bag (5000psi) concrete with fiber mesh in the mix, especially if only pouring 2-3 inches. In the pit make sure to compact your rock in lifts and use a clean crushed stone with no lime.

Good luck

 

[Quinque]

I did this overlay of about 5 inches of concrete in a 5 bay self serve in early 1980's in order to add tubing for floor heat. It is still working OK, but the problem I had was the vehicle rubbing the concrete as it would leave. I had to build up the exit area to remedy this situation.
I know of one other carwash that had the same issue.
Roger

 

[mjwalsh]

I am considering closing in one of may bays at my older wash and do not want the dramatic slope that goes to the pit. I was thinking I could fill the pit in with gravel and pour a few inches of concrete over the existing bay concrete. Is there a problem in doing this?

Buz,

Make sure you avoid any feather edging. We avoided that by cutting away & jackhammering where the concrete meets other concrete

Just a thought & observation ... you will find it more difficult to wash down the bays if you have less slope to the pit.

mike