pouring concrete over concrete

Posted by on December 10, 2006, 5:34 pm

I have a solid tapering slab that I want to even up. It was designed
to taper, as it is an outside sleeping porch (under the roofline
thuogh) and it has a drain on one side. I want to raise it and frame
it in. SO my question is this:

I'm thinking of putting down about 1 cu yd of concrete (2 inch average
over 150 feet) to even it up. However, I need to taper from 3 inches to
0. If I put down a filler layer of concrete and then self leveler,
first roughing the surface and use a bonding compound, how thin can I
leave the taper on the edges? One inch? two inches?

I then intend to even up the whole thing by pouring self leveler over
the top. however, 1 cu yd of self leveler is way too expensive.

Any suggestions?

Andy

Posted by clintonG on December 11, 2006, 4:50 pm

Hire a mudjacker. They solve these problems all the time and even if you top
off an existing surface you still probably need to mudjack to ensure the
stability of the subsurface or it will just break up the new top. This is
espeically pertinent when the existing surface is already clearly broken or
significantly cracked up. Hire a mudjacker.

<%= Clinton Gallagher
NET csgallagher AT metromilwaukee.com
URL http://clintongallagher.metromilwaukee.com/
MAP http://wikimapia.org/#y=43038073&x=-88043838&z=17&l=0&m=h

>I have a solid tapering slab that I want to even up. It was designed
> to taper, as it is an outside sleeping porch (under the roofline
> thuogh) and it has a drain on one side. I want to raise it and frame
> it in. SO my question is this:
> I'm thinking of putting down about 1 cu yd of concrete (2 inch average
> over 150 feet) to even it up. However, I need to taper from 3 inches to
> 0. If I put down a filler layer of concrete and then self leveler,
> first roughing the surface and use a bonding compound, how thin can I
> leave the taper on the edges? One inch? two inches?
> I then intend to even up the whole thing by pouring self leveler over
> the top. however, 1 cu yd of self leveler is way too expensive.
> Any suggestions?
> Andy
>

Posted by Dan Deckert on December 12, 2006, 1:12 am

Yea, contact Sika.
http://www.sikaconstruction.com/con/con-prod-app-plmsf.htm

Dan

> I have a solid tapering slab that I want to even up. It was designed
> to taper, as it is an outside sleeping porch (under the roofline
> thuogh) and it has a drain on one side. I want to raise it and frame
> it in. SO my question is this:
> I'm thinking of putting down about 1 cu yd of concrete (2 inch average
> over 150 feet) to even it up. However, I need to taper from 3 inches to
> 0. If I put down a filler layer of concrete and then self leveler,
> first roughing the surface and use a bonding compound, how thin can I
> leave the taper on the edges? One inch? two inches?
> I then intend to even up the whole thing by pouring self leveler over
> the top. however, 1 cu yd of self leveler is way too expensive.
> Any suggestions?
> Andy

Posted by Dan Deckert on December 12, 2006, 11:42 pm

> Is the Sika product generally too pricey when a yard or more is needed?

That I can not answer. What I can tell you is, virtually every contractor
and metal building erector I've worked for in the past 15 years has switched
to Sika for products. They're much like Hilti, spendy as all get out, but
the stuff doesn't fail and works as prescribed when properly installed. As
99.9% of my work is in industrial/commercial areas, the contractor can not
afford to do a job twice. I'd surmise you may ask this, do you spend a grand
(in theory) and do the job once or do you spend a grand (or more) and do the
job twice? Time is still money.......................

Dan

> Is the Sika product generally too pricey when a yard or more is needed?
> Bill

> > Yea, contact Sika.
> > http://www.sikaconstruction.com/con/con-prod-app-plmsf.htm
> > Dan

Posted by DanG on December 12, 2006, 10:43 pm

Several issues.

If you are going to close it in and if it is permitted, you will
be pouring a footing around the exterior perimeter.

Is there a way you can raise the high side at least 1" (1 1/2
would be even better) and the outside 4" ? If so, I would be
inclined to use bonding agent and pour a 3/4- concrete cap. You
would have no need for self leveling material. If there are
joints or cracks, they will need to be addressed in the cap slab.
___________________________
Keep the whole world singing. . . .
DanG

>I have a solid tapering slab that I want to even up. It was
>designed
> to taper, as it is an outside sleeping porch (under the roofline
> thuogh) and it has a drain on one side. I want to raise it and
> frame
> it in. SO my question is this:
> I'm thinking of putting down about 1 cu yd of concrete (2 inch
> average
> over 150 feet) to even it up. However, I need to taper from 3
> inches to
> 0. If I put down a filler layer of concrete and then self
> leveler,
> first roughing the surface and use a bonding compound, how thin
> can I
> leave the taper on the edges? One inch? two inches?
> I then intend to even up the whole thing by pouring self leveler
> over
> the top. however, 1 cu yd of self leveler is way too expensive.
> Any suggestions?
> Andy
>

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